Check in A Review Science Part 2

Front

What happens to the weight of a frozen bottle of water compared to an unfrozen bottle of water?

Back

The unfrozen bottle of water and the frozen bottle of water weigh the same amount.

Front

Who ran the fastest in a 500-meter race among Daniel, Maria, Sally, and Tyler?

Back

Sally ran the fastest.

Front

What is rusting of a cast iron pan an example of?

Back

Chemical change; the rust is new material that formed.

Front

Why do a bike and a truck fall at the same rate when dropped from the same height?

Back

All objects fall to the earth at the same rate.

Front

What happens to the weight of salt water after boiling without a lid?

Back

150 g because some water evaporates into the air surrounding the pot and decreases the total mass.

Front

What is the definition of mass?

Back

Mass is the amount of matter in an object, usually measured in grams or kilograms.

Front

What is the principle of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction; it remains constant.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is gravity?

Back

Gravity is a force that attracts two bodies toward each other, depending on their masses and the distance between them.