Mrs. wilson’s exam for 6th grade at wilson hall study guide – Flashcards
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What's Volcanoes and Earthquakes?
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Occur at plate boundaries(divergent, spreading, mid-ocean ridges)(convergent, trenches)(transform, sliding, San Andreas)
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What's earth's revoilution
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30km/s
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_____ is always used in science
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metric
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measures work
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joule
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a unit is eather ____, _____, or ______
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meter liter gram
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change
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convert
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the distance the object travels in one unit of time
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speed
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what is the formula for speed
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speed = ___distance___ time
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means a steady pace
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constant speed
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speed and direction of an object
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velocity
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___ _____ ________ must keep very close tracksof the velocity of air craft
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air traffic controler
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have the most stressful job
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air traffic controler
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the hard outer layer of the earth
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lithosphere
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dividing line
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boundary
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a push or pull
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force
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the overall force on an object after all the forces are added together
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net force
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equal forces acting on one object in oppisite directions
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balanced forces
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every object resist any change to its motion, the resistance is called _____
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inertia
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the (SI) unit of mass is the ________
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kilogram
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the amount of matter in an object
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mass
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the kind of stuff that all objects are made out of
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matter
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state newton's first law of motion
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an object at rest will remain at rest and an object that is moving at a constant speed will continue moving at a constant speed unless acted upon by an unbalanced force
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one ______ equal the force required to accelerate one kilogram of mass at 1 meter per second per second
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newton
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1 kilogram weighs about ____
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2.2 pounds
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1 kilometer equals ______
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.6 miles
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a force that pulls down
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gravity
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forces working in oppostite directions
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friction
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a force that causes an obeject to move in a circle
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centripetal force
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any object that travels around another in space
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satellite
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the mass of a substancecontained in a unit of volume
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density
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a substance that can easily change shape
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fluid
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the ability to do work on an object
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energy
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name 3 types of friction
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sliding, rolling, and fluid
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two solid surfaces that slide over each other ; this creates most friction
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sliding friction
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friction that occurs when an object rolls over a surface
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rolling friction
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creates the least amount of friction
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fluid friction
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when the only force acting on a falling object is gravity
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freefall
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state newton's third law of motion
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if one object exerts a force on another object then the second object exerts a force of equal strength in the opposite direction on the first object
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an object that is thrown
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projectile
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state newton's 2nd law of motion
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for every action there is an equal and opposite reaction
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moving away from the center , force pushing an object outward away from the center
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centrifugal force
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the rate at which work is done
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power
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the larger the acre results in ____ downward pressure
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less
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air pressure at sea level is about ______
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10.bn/cm2
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at higher elevations there is ___ air above you
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less
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a break in the earth's crust where slabs of rock slip past each other
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fault
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gas trap
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bubble
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cave
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cavity
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upside down wing
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spoiler
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same bone structure but different function
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homogenous structure
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pencil lead
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graphite
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why does water expand when frozen
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cause it forms a crystal
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______ is less dense than air
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helium
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_____ is less dense than water
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ice
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______ have to travel faster than earth for orbit
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satellites
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the titanic departed from_____ in _______
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england 1912
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takes place of
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displace
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put under water
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submerge
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weight = _______
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gravity
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front of the boat
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bow
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back of the boat
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stern
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change
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convert
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what was wright brother's goal
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to fly a plane heavier than air
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where did they test their odd vechile
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a deserted beach in kitty hawk north carolina
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is a device with which you and do work in a way that is easier or more efficient
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machine
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what is the formula for work
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F times D
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the force you exert on a machine
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input force
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the force exerted by the machine
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output force
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is the output force a machine gives you to make work easier
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mechanical advantage
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compare the input work to the output work
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efficiency of a machine
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a machine who has an efficiency of ____ loses very little work
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95%
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an ideal machine would have efficiency of ___
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100%
