Chapter 2 sections 2 and 3 science test – Flashcards

A ________ change is any change that alters the form or appearance of matter but does not make any substance in the matter into a different substance.

Which of the following is an example of a physical change: a. melting ice b. burning of natural gas c. rusting of an iron fence (oxidation) d. burning candle

A change in matter that produces one or more new substances is a ________ change.

Which of the following is an example of a chemical change? a. sugar dissolved in water b. crushed can c. broken window d. burning candle

True or False. If false, give the true answer. A substance that undergoes a physical change is a DIFFERENT substance after the change.

True or False. If false, give the true answer. A PHYSICAL change produces new substances with properties different from those of the original substances.

The fact that matter is not created or destroyed in any chemical or physical change is called the ____________

What does this illustration demonstrate?

The law of conservation of matter is sometimes called the law of conservation of _______, because ______ measures the amount of matter.

Look at example on handout. Which of the following is formed during methane burning? a. oxygen b. hydrogen c. carbon d. water

Which of the following does NOT describe a chemical change? a. Liquid water freezes and turns to ice b. Methane burns & turns into carbon dioxide & water c. Hydrogen peroxide breaks down into water and oxygen gas d. Iron combines with oxygen to form rust

The law of the conservation of matter states that a. atoms are gained during a chemical reaction b. atoms are lost during a chemical reaction c. atoms are gained and lost during a chemical reaction d. atoms are rearranged during a chemical reaction

______ is the ability to do work or cause change.

True or False. If false, make it true. Every chemical or physical change in matter includes a CHANGE in energy.

______ is anything that has mass and takes up space. Every form of it has two kinds of properties: ______ properties and _____ properties.

A ______ _______ is a characteristic of a pure substance that can be observed without changing it into another substance.

An example of a physical property is: a. flammability b. rust c. baking bread d. flexibility

An _______ is a pure substance that cannot be broken down into any other substances by chemical or physical means.

True or False. If false, fix it. ELEMENTS are the simplest substances.

When atoms combine, they form a _____ _____, which is a force of attraction between two atoms.

The following is an example of three atoms that have chemically bonded to make a water ______.

_________ energy is the total energy of all the particles in an object.

Thermal energy ALWAYS flows from (warmer or colder) matter to (warmer or colder) matter.

True or False Forms of energy related to changes in matter include thermal energy, chemical energy, electromagnetic energy, and electrical energy.

A form of energy that travels through space as _________ is an example of electromagnetic energy.

What chemical changes can give off electromagnetic energy? a. photosynthesis b. light from a wood fire c. melting iceberg d. farts

The energy an object has due to its ________ is called kinetic energy.

True or False Kinetic energy increases as mass increases.

Stored energy that results from the position or shape of an object is called ________ energy.

True or False Potential energy has the potential to do work