Chemical and Physical Changes Review

Front

What does the atomic number tell us about an atom?

Back

The atomic number indicates the number of protons in an atom.

Front

Is burning wood a chemical or physical change?

Back

Burning wood is a chemical change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

When balancing the equation 2Na + Cl2 → ___NaCl, what coefficient should be placed in front of NaCl?

Back

The coefficient that should be placed in front of NaCl is 2.

Tags

NGSS.MS-PS1-5

Front

What is an example of a chemical change?

Back

An example of a chemical change is rusting of iron.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What term best describes the process of a metal degrading/corroding over time in a humid environment?

Back

The process is called corrosion.

Tags

NGSS.MS-PS1-5

Front

What is a physical change?

Back

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

Tags

NGSS.MS-PS1-4

Front

What is a chemical change?

Back

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

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What happens to the mass of a substance during a chemical change?

Back

The mass of a substance is conserved during a chemical change, according to the law of conservation of mass.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Tags

NGSS.MS-PS1-1

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.

Tags

NGSS.MS-PS1-5