What often happens when a chemical or physicak change occurs?

Which of the following statements best explains why a substance changes from a liquid to a gas when heated?

What kinds of energy are produced by bright fireworks?

A student is making vegetable soup on the stove. He learned in science class that liquids boil at the same temp until they change to a gas. How will what he learned help him cook the soup and save energy?

Students were asked to design an experiment that added or removed energy to a chemical reaction. Which of the following hypothesis would be found in an experiment that tested this?

A bag containing several chemicals is used for sports injuries. When the chemicals are combined, the bag becomes cold. What is this evidence of?

Electromagnetic energy can be found in

The amount of stuff in an object is known as

______________________ is the amount of space that matter occupies.

A characteristic of matter that can be observed without changing the substance into something else is known as what?

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