Midterm SG #2

Front

What is a physical change?

Back

A physical change is a change in which the matter retains its original identity, meaning no new substances are formed.

Front

What is a chemical change?

Back

A chemical change is a change in matter where the substance changes into other substances with different physical and chemical properties.

Front

What is a solid?

Back

A solid is matter that has a definite shape and a definite volume.

Front

What happens to energy when hot chocolate is placed in cool air?

Back

Energy will transfer from the hot chocolate to the colder air.

Front

What is an example of a physical reaction?

Back

An example of a physical reaction is a change in size.

Front

What is the definition of matter?

Back

Matter is anything that has mass and takes up space.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not alter the identity of the substance, while chemical changes result in the formation of new substances.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter, which is the total energy of all the particles in an object.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is an example of a chemical change?

Back

An example of a chemical change is burning wood, which produces ash and smoke.