Siegel Review Questions

Front

Is salt (NaCl) a compound or an element?

Back

Compound

Front

How many atoms of oxygen are in the compound NaCl?

Back

0 (NaCl contains no oxygen atoms; it contains sodium and chlorine atoms only.)

Front

What is defined as anything that has mass and takes up space?

Back

Matter

Front

What is an example of a physical change in the digestive system?

Back

Teeth grinding an almond into smaller pieces in the mouth.

Front

What kind of change occurs when a new substance is formed?

Back

Chemical change.

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in the formation of new substances.

Front

What is an example of a chemical change?

Back

Burning wood, which produces ash and smoke.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.