question

statins in stroke therapy

answer

use them they are good for you decrease risk of stroke by 18% with or without CHD

question

type of soil that contains a mixture of sand, silt, clay and humus

answer

loam

question

Englishman who introduced the scientific method

answer

Bacon

question

a muscle that forces air into and out of the lungs

answer

diaphragm

question

a structure that has infinite form and performs a certain function for a body is a _______

answer

tissue

question

the part of a flower from which fruits are formed

answer

ovary

question

the layer of the atmosphere closest to the earth's surface

answer

troposphere

question

evaporation of water from plant leaves is called _______.

answer

transpiration

question

the tiny vessels that supply cells with oxygen and nutrients

answer

capillaries

question

all of the water found in the ocean, land, and atmosphere is known as ______.

answer

hydrosphere

question

organisms that provide the initial source of food in a food chain

answer

producers

question

one thing that makes it almost impossible for men to live in Arctic regions is the____

answer

coldness

question

___ rocks form when molten materials inside the earth hardens

answer

igneous

question

large pits from which blocks of rock are mined are called ____

answer

quarries

question

this part of the body helps keep our balance

answer

semicircular canals

question

it is a piece of land that is level and usually higher than the surrounding land

answer

plateau

question

bean-shaped organ that remove liquid wastes from the blood

answer

kidneys

question

the process by which rocks are broken down into soil

answer

weathering

question

the most common mineral in the earth's crust

answer

quartz

question

___ occurs when a sperm joins an egg cell

answer

fertilization

question

a seedling is a plant that is able to survive without its ____

answer

cotyledons

question

these are tubes that carry urine from the kidneys to the bladder

answer

spleens

question

the best type of soil for growing plants is ___

answer

loam

question

a group of organs that function together to do a specific job for the body

answer

organ system

question

it is the largest internal organ of the body

answer

liver

question

the products of photosynthesis are water, oxygen, and _____

answer

glucose

question

animals that eat meat are called ______

answer

carnivores

question

a ___ is a safety device to prevent fires when an electrical circuit becomes overheated

answer

fuse

question

a relationship in which two organisms benefit from each other

answer

symbiosis

question

___ and sulfur dioxide are the two compounds responsible for the formation of acid rain

answer

nitrogen oxide

question

wind, water and temperature changes cause rocks to break apart in a process called

answer

physical weathering

question

the blending of an animal's color into its surrounding is called _____

answer

protective coloration

question

the color of visible light with the shortest wavelength is ___

answer

violet

question

the color of visible light with the longest wavelength is ___

answer

red

question

the electromagnetic waves that may produce skin cancer are___

answer

ultraviolet rays

question

the tendency of a motionless object to remain at rest and the tendency of a moving object to continue moving

answer

inertia

question

many animals of the seashore do not move around but they have plenty to eat because the ____ bring their food to them

answer

tides

question

when electrons pass from one wire to another at the bare spots, by-passing a planned path and heating the wires, we say there is a _____

answer

short circuit

question

light enters the eye through a hole called the _____

answer

pupil

question

the pupil is surrounded by a colored substance called the ____

answer

iris

question

this is a device for measuring wind speed

answer

anemometer

question

the imaginary line running through the center of the earth from pole to pole is called ____

answer

axis

question

the area that has the widest yearly temperature variations is the ____

answer

taiga

question

the sweat glands are found in the ____

answer

skin

question

the _____ carry blood away from the heart

answer

arteries

question

the ___ stores bile produced by the liver

answer

gallbladder

question

if air is _______, it is holding 100% of the moisture it can hold

answer

saturated

question

an organized way of soling a problem

answer

scientific method

question

the longest day of the year is known as ___

answer

summer solstice

question

rapidly rotating winds that blow around a small area of intense low pressure are called ____

answer

tornadoes

question

the scientist who discovered that heavy and light bodies of the same substance fall at the same speed

answer

Newton

question

animals which are active by night are said to be ___

answer

nocturnal

question

____ have flattened bodies with 2 pairs of legs per segment

answer

millipedes

question

these are marine animals covered with spines

answer

echinoderms

question

perpetually frozen ground below the surface is called ___

answer

permafrost

question

a large quantity of air sharing the same characteristics is an ____

answer

air mass

question

the type of front that moves the fastest is the ____

answer

cold front

question

the part of the eye which prevents light from entering the eye is the ___

answer

eyelid

question

the basic cause of all weather is the ___

answer

sun

question

___ is really the weight of all the air about us

answer

air pressure

question

differences in air pressure cause the air to ____

answer

move

question

air pressure, wind, heat and precipitation are things that make up the ___

answer

atmosphere

question

clouds formed from the vertical lifting of warm air are ____

answer

cumulus

question

the changing of liquid molecules to vapor is known as ___

answer

evaporation

question

What is the law which states that volume and temperature are directly related?

answer

Charles Law

question

the largest family of flowering plants in the ____ family

answer

composite

question

the pH number for a neutral substance is ____

answer

seven

question

a person who studies soil

answer

pedologist

question

Boyle's law and Charles's law explain the behavior of ____

answer

gases

question

insects that feed on decaying matter are called ____

answer

scavengers

question

since electricity is able to do work, scientists classify it as one form of ____

answer

energy

question

the earth rotates from ____ to ____

answer

west east

question

_____ is water vapor frozen at ground level

answer

frost

question

the layer of solid unbroken rock in the earth's crust is ____

answer

bedrock

question

the leaves of the cactus plants are called ___

answer

spine

question

lenses which make objects look larger are ___ in the middle

answer

thicker

question

a device for stopping and starting the flow of electricity is a ____

answer

switch

question

____ is the inflammation of the mucous membrane of the trachea and the bronchial tubes

answer

bronchitis

question

the sweet liquid that attracts insects to flowers is ___

answer

nectar

question

these are structures which give form to the body and protect vital organs

answer

bones

question

the _____ is used to indicate acidity and alkalinity

answer

pH scale

question

the number of complete waves that pass a given point in a unit of time is referred to as

answer

frequency

question

_____ is the measure of the gravitational force on an object

answer

weight

question

the atmospheric conditions at a certain time and place are called

answer

weather

question

the energy of position is called ____ energy

answer

potential

question

the leaflike structures that surround the petals of a flower are called

answer

sepals

question

the _____ connect bones to bones

answer

ligaments

question

what name is given to one-celled organisms lacking an organized nucleus?

answer

prokaryotes

question

at high temperatures the wire in a fuse will

answer

melt

question

Who discovered that planets travel in elliptical paths?

answer

Kepler

question

these are invertibrates which have tentacles, stinging cells and bodies like hollow cylinder with a single opening

answer

coelenterates

question

it is a kind of relationship wherein one species is benefited while the other is neither benefited nor harmed

answer

commensalism

question

a tubular sucking organ of the lepidopteran is called ____

answer

proboscis

question

the region near the equator that has practically no wind is the ___

answer

doldrums

question

the purpose of the eyespots on a luna moth's wings is to ____

answer

protect

question

organisms that obtain nourishment from dead organisms are _____

answer

saprophytes

question

organelles in plant cells that enables them to carry on photosynthesis

answer

chloroplasts

question

the principle which explains why airplanes can fly was discovered by

answer

Bernoulli

question

an infection may spread from the throat to the middle ear through the ____

answer

Eustachian tube

question

scientists divide the distance between the boiling and freezing points into equal divisions. these divisions are called

answer

degrees

question

the number of protons an atom contains is indicated by its ___

answer

atomic number

question

the largest order of insects is the order

answer

coleoptera

question

a sachet of coffee granules and a tablespoon of sugar were mixed with a cup of hot water, then stirred. the resulting mixture can be classified as ____

answer

solution

question

a sachet of coffee granules and a tablespoon of sugar were mixed with a cup of hot water, then stirred. the solvent used is ______

answer

hot water

question

a ____ can occur when the moon is between the earth and the sun

answer

solar eclipse

question

in which organ system are eyes and ears most closely associated?

answer

nervous system

question

the ___ tissue is the animal tissue that has a function of protection and support

answer

epithelial

question

the ___ tissue is the animal tissue that has a function of binding and support

answer

connective

question

the ___ tissue is the animal tissue that has a function of conduction and message sending

answer

nervous

question

_____ is the study of fishes

answer

ichthyology

question

_____ is the study of birds

answer

ornithology

question

one way ofeffectively killing a tree is to cut a ring of bark around the trunk of the tree. this method essentially affects the function of what tissue?

answer

phloem

question

____ is the amount of matter in a given space

answer

density

question

_____ is the change of velocity over a given time

answer

acceleration

question

_____ discovered the radioactivity of Uranium

answer

Madame Marie Curie

question

a weather instrument used to measure the relative humidity, using the cooling effect of evaporation

answer

psychrometer

question

____ is a symbiotic association of fungi and roots of plants

answer

mycorrhiza

question

how many significant figures are there in 1.00100?

answer

6

question

_____ is the study of animals

answer

zoology

question

___ is the specific study of insects

answer

entomology

question

the Greek mathematician and astronomer who is known as the first person to accurately measure the size and circumference of the earth

answer

Erastosthenes

question

the formation of a new crust on the ocean is called

answer

sea-floor spreading

question

the ozone layer is known to filter harmful radiations such as UV and gamma rays from entering the earth and causing damage to life forms. In what region of the atmosphere is it mostly located?

answer

stratosphere

question

the largest organ in the human body is the ___

answer

skin

question

the skin belongs to the ____ system

answer

integumentary

question

the hammer, anvil and stirrup are the three smallest bones in the human body and they are found in the _____

answer

ear

question

if the chromosome number of your skin is 46, the number of chromosome in your gametes is ___

answer

23

question

it is during this period of the Mesozoic era when dinosaurs first evolved

answer

Triassic

question

a certain vine plant is symbiotically associated with a certain tree. the vine gets nutrients by piercing through the vascular tissues of the tree. this is a clear example of_______

answer

parasitism

question

plants and animals must take in nitrogen to make proteins, animals get it from the food they eat, while plants get nitrogen from the ____

answer

soil

question

which type of blood vessel generally carry oxygenated blood away from the heart to the different parts of the body?

answer

artery

question

what is the amount of work needed to push a 50 Newton box to a distance of 300 cm?

answer

150Joules

question

the most abundant gas in the earth's atmosphere is _____

answer

nitrogen

question

the most abundant element in the earth's crust is ____

answer

silicon

question

dry ice is solid carbon dioxide and is very cold. when removed from a storage container, the dry ice transforms directly into a gas without melting. this is an example of ____

answer

sublimation

question

if an atom has 4 protons, 5 neutrons and 3 electrons, what is the charge of the atom?

answer

positive 1

question

the process which changes food to a simple, soluble form is called _____

answer

digestion

question

substances which cause chemical changes in foods are called _____

answer

enzymes

question

an important substance which carries on digestion in the small intestine is ___

answer

pancreatic juice

question

the secretion given off by the liver which helps in the digestion of fats is ____

answer

bile

question

the liquid portion of the blood is the ___

answer

plasma

question

all body functions of an individual are coordinated by the ____

answer

nervous system

question

what is the smallest living thing which can cause disease in humans?

answer

bacterium

question

the food-making process in green plants is called ____

answer

photosynthesis

question

a metallic substance capable of attracting iron and certain other materials

answer

magnet

question

metal cans, such as those used to pack foods can be attracted by magnet because the can is made chiefly of ___

answer

tin

question

magnetic lines of force can be demonstrated with a magnet and ____

answer

iron filings

question

a dry cell is safe to use in an experiment because it has a low voltage. the metallic case of a dry cell is made of ____

answer

zinc

question

if the removal of one lamp from a string of christmas tree lights will cause the rest of the lamps to go out, the lamps are connected in ____ circuits

answer

series

question

all of the planets move in elliptical orbit in the same direction around the Sun, and they lie in almost the same plane except ____

answer

pluto

question

the earth travels around the Sun once a year. the earth spins on its axis once each ____

answer

day

question

the force that an object exerts on a given unit of area is called _____

answer

pressure

question

an element that is naturally radioactive is _______

answer

radium

question

when sugar dissolved in water, the water is called the ______

answer

solvent

question

a jackscrew is a combination of an inclined plane and a ______

answer

screw

question

the movement of one object over another is slowed down by ____

answer

friction

question

in order to work, some machines use the energy contained in ____

answer

fuel

question

the energy contained in fuel is an example of _____energy

answer

chemical

question

oil is put on the bearing of wheels to reduce ____

answer

friction

question

when coal is burned, stored energy is being released in the form of _____energy

answer

thermal

question

alum is used in the process of water purification called ____

answer

coagulation

question

______ is often used in water purification to kill some harmful bacteria

answer

chlorine

question

the process of ___ is used to produce water that is chemically pure

answer

distillation

question

solids mixed in water can be removed by ____

answer

filtering

question

one way to determine whether water has minerals dissolved in it is to boil the water to see if there is a ____

answer

residue

question

water that has just been boiled will taste flat because ____ has escaped from the water

answer

dissolved air

question

the sense organs found at the side of the papillae are known as ____

answer

taste buds

question

clear water still contains bacteria and other organism. a chemical should be added to sterilize it. the chemical most commonly used is ___

answer

chlorine

question

____ is the source of all water in the world

answer

sea

question

which part of the tongue is sending most messages to the brain when you taste vinegar?

answer

side

question

the process whereby organic matter is broken down and goes back to the soil is called ____

answer

decay

question

in which part of the flower is pollen produced?

answer

anther

question

_____ is the male reproductive part of the flower

answer

stamen

question

fertilization in the flower results in the production of ___

answer

seed

question

when bulbs are connected in ____ circuit, the current in all parts of the circuit is the same

answer

series

question

the appliances used in the house should be connected in _____ circuit with the main supply

answer

parallel

question

if you are going to connect two light bulbs in one battery, which circuit arrangement would be more practical to use?

answer

parallel

question

the gas that plays an important role in the process of burning is ___

answer

oxygen

question

the strongest intermolecular force of attraction exists in ___

answer

solid

question

producers refer to the green plants that make food. fungi and bacteria which feed on dead plants and animals are known as _____

answer

decomposers

question

consumers can be classified as primary, secondary and tertiary according to the type of food they eat. primary consumers feed directly on green plants. they are also known as ____

answer

herbivores

question

any animal that feeds on bird, rabbit, mouse or any other secondary consumer is called ____

answer

tertiary consumer

question

the most abundant element on the earth's crust is ____

answer

oxygen

question

metals are hard, shiny solids, with the exception of the only liquid metal which is ___

answer

mercury

question

the hardest substance known is a non-metal. it is made up of carbon. it is ____

answer

diamond

question

when acid is mixed with a base, salt is produced. this process is called _____

answer

neutralization

question

the chemical name of common salt is ____

answer

sodium chloride

question

sodium hydroxide is an example of a/an ____

answer

base

question

animals with backbones are called ____

answer

vertebrates

question

the backbone is not a single bone. instead it is made up of several bones called ______

answer

vertebrae

question

inside the backbone, the bundle of nerves which connects the brain to other parts of the body is known as ____

answer

spinal cord

question

a magnifying lens contains ____lens which tend to make the objects appear larger

answer

convex

question

a lens that is thinner in its center than at its edges and spreads light apart is called ___ lens

answer

concave

question

bacteria can be classified according to shape. bacteria that are sphere-shaped or globular are called ____

answer

cocci

question

some microorganisms can cause diseases. these are known as ____

answer

pathogens

question

in a transverse wave, the distance from one wave crest to another is known as ____

answer

crest

question

waves that have the longest wavelengths and are used to carry telephone calls, mobile phone transmission and picture signal over long distances are ___

answer

radiowaves

question

the highest point of the wave is known as ___

answer

crest

question

_____ waves are transverse waves that carry energy in a way related to electricity and magnetism, examples of which are radiowaves, ultraviolet waves and gamma rays

answer

electromagnetic

question

during germination, the seed enters a state of being very dry. they can remain alive but inactive for a long period of time. this stage is known as ____

answer

dormancy

question

the first part of the embryo to emerge from the seed is called ___

answer

radicle

question

the structure that covers and protects the seed from injury is called ____

answer

seed coat

question

the seed tissue which stores food for the embryo is ____

answer

cotyledon

question

the tube that runs from the mouth to the anus is called the _______

answer

alimentary canal

question

the series of wave-like muscular movements which moves the food down the alimentary canal is known as ____

answer

peristalsis

question

this is a liquid inside the stomach that contains dilute hydrochloric acid and enzymes which aid in digestion

answer

pancreatic juice

question

the process of breaking down food into smaller molecules that can be absorbed by the body is called ___

answer

digestion

question

enzymes are special proteins that hasten chemical reaction; they speed up chemical reactions without themselves getting directly involved. the enzyme found in saliva is ____

answer

amylase

question

if you leave iced water for several minutes, you will see droplets of water form outside the glass. this process is called ____

answer

condensation

question

what type of eclipse occurs when the moon passes between the sun and the earth?

answer

solar eclipse

question

a ___ eclipse occurs when the moon passes into the Earth's shadow

answer

lunar

question

the most abundant gas in the atmosphere which makes up 78% of it is ____

answer

nitrogen

question

energy is transferred from the sun to the earth by ___

answer

radiation

question

the ____ is a layer in the atmosphere which has a beneficial effect of absorbing harmful ultraviolet rays

answer

stratosphere

question

particles or waves given off by atoms undergoing nuclear decay produce ____

answer

radiation

question

similar organisms which are able to produce offspring that can also reproduce are grouped under _____

answer

species

question

animals that are able to keep a constant body temperature are warm-blooded or ____

answer

endothermic

question

invertebrates with six legs and three body parts are _____

answer

insects

question

the remains or traces of an organism that was once alive is a _____

answer

fossil

question

water is a combination of hydrogen and oxygen atoms. it is considered as _____

answer

compound

question

two or more substances mixed together but not joined chemically form a/an _____

answer

mixture

question

the anvil, hammer and ____ make up the bones of the ears

answer

stirrup

question

light travels with a speed of _______ km/s

answer

300,000

question

layers of pollutants in the air caused by exhaust gases from automobiles which reacts in sunlight is called _____

answer

smog

question

wastes that can be broken down by the action of bacteria is _____

answer

biodegradable

question

____ is a part of the topsoil formed by the decay of once living organisms

answer

humus

question

the force that keeps the earth in orbit around the sun is ____

answer

gravity

question

what happens to the oxygen released during photosynthesis?

answer

it is returned to the atmosphere

question

how does the skin protect the body from bacteria?

answer

the skin prevents bacteria from entering the body

question

what happens when a skydiver jumps off from a plane?

answer

he falls with increasing speed

question

Earthquakes frequently occur in Japan because______

answer

Japan is within the Pacific Belt of Fire

question

Atoms of 6C12 and 6C14 has a difference of two _____

answer

neutrons

question

choloroflourocarbon (CFC) is one of the substance known to cause _________ in the stratosphere thus causing global warming

answer

ozone depletion

question

the symbiotic relationship between dog and fleas is called _____

answer

parasitism

question

this is considered to be the largest gland located at the upper part of the body and at the right abdominal cavity

answer

liver

question

the _____ of vertebrates function to excrete unwanted chemicals, including salt

answer

kidneys

question

the spreading out of colors when light shines through a prism is called ___

answer

dispersion

question

which of the heart's chambers receive oxygenated blood from the lungs?

answer

left atrium

question

an object which is white ______ all light

answer

reflects

question

the amount of energy in living systems _____ as one goes higher in the energy pyramid

answer

decreases

question

a sea water plant was exposed to increasing light intensities, after some time, formation of bubbles was observed, this means that the plant undergoes _____

answer

respiration

question

sound waves can only travel through a medium. it travels fastest in ______

answer

solid

question

the bending of light is called ______

answer

refraction

question

if you place a moth ball in your dresser, it will get smaller after some time. this is because it'll undergo the process of ____

answer

sublimation

question

in what medium will the speed of light be the fastest?

answer

vacuum

question

dstance is measured by multiplying the speed and the ____

answer

time

question

a falling stone hits the ground. what happens to its kinetic energy?

answer

it is converted to potential energy

question

the main product of combustion is ____

answer

carbon dioxide

question

the instrument used to measure atmospheric pressure is ______

answer

barometer

question

the process whereby acid and base are combined is called _____

answer

neutralization

question

air is a mixture, solution or compound?

answer

solution

question

the state of matter that exists only at very high temperature and consists of electrically charged particles is _______

answer

plasma

question

the condition which occurs when the atmospheric pressure is equal to the vapor pressure

answer

boiling

question

the measure of the average kinetic energy of the particles in matter is ____

answer

temperature

question

as heat is added to a material, the kinetic energy of its particles increases thus volume increases and the material ____

answer

expands

question

a substance that does not allow heat and electricity to pass through is called ______

answer

insulator

question

a magnet that holds its magnetic properties over a period of years is callled a _______. it is made up of either iron, cobalt or nickle

answer

permanent magnet

question

the radioactive element that is used for measuring the age of very old rocks

answer

carbon-14

question

the main cause of tides is____

answer

the pull of the moon and the sun on the earth

question

the river deposit at the mouth of a river in a lake or ocean is called ____

answer

delta

question

in the water cycle, at which point is water most pure?

answer

in rain

question

the sun heats the sea and some of the water becomes vapor. The vapor collects as clouds. When these are blown over high ground they release water as rain in the process known as ______

answer

precipitation

question

th four main kinds of taste are____

answer

sweet, sour, salty and bitter

question

in freezing, liquid changes to solid. what happens in condensation?

answer

gas changes to liquid

question

if your hand touches a hot object, you will pull it away immediately. This action is known as ____

answer

reflex action

question

majority of bacteria are harmless and some are even beneficial to man. The bacterium commonly known to help is proper food digestion is _____

answer

lactobacillus

question

________ is a fatal disease caused by a bacteria known as vibrio cholerae

answer

cholera

question

why does copper sink in water while oak wood floats?

answer

an object with higher density than water sinks while an objects with lower density than water floats

question

why is it easier to float in the sea than in a lake?

answer

sea water is denser than fresh water

question

why does ice float in water?

answer

ice has lower density than water

question

there are two types of solar eclipse. It is __________ when the face of the sun appears to be completely covered or eclipse by the moon.

answer

total eclipse

question

the four most important gases in the atmosphere are _____

answer

oxygen, carbon dioxide, nitrogen and argon

question

a small, hot planet will most likely have ____

answer

no atmosphere

question

a ______ is a symbiotic association of fungi and algae

answer

lichen

question

carbon monoxide exuded by vehicles is dangerous when inhaled in great amount because _____

answer

it competes with oxygen for binding with red blood cells

question

refining metal ore using heat is an example of _____ change

answer

chemical

question

a seed planted upside down so that its root end is facing up & its shoot end is facing down, but after germination the root grows downward & the shoot grows upward. this is an example of what process?

answer

phototropism and geotropism

question

the correct sequence of biological organization from lowest to highest

answer

molecules > cell > organ > population > community

question

density is the amount of matter in a given space. which has greater density, a lake full of water or a cupful of lake water?

answer

both have the same density

question

in a _____ relationship, the two organisms live closely to each other

answer

symbiotic

question

objects seem to be heavier on earth than the moon because _____

answer

earth has stronger gravitational pull than the moon

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