7th grade Science REVIEW 1st Semester

Front

What is the relationship between molecules and atoms?

Back

Molecules are made up of two or more atoms.

Tags

NGSS.MS-PS1-1

Front

What does the Law of Conservation of Matter state?

Back

Matter cannot be created or destroyed in a chemical reaction.

Tags

NGSS.MS-PS1-5

Front

How do we know a chemical reaction has occurred at the atomic level?

Back

The hydrogen and oxygen atoms regroup into a new molecule.

Tags

NGSS.MS-PS1-2

Front

What is formed as a result of a chemical reaction?

Back

A new substance with different properties is formed.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object has due to its motion.

Tags

NGSS.MS-PS3-1

Front

Which ball would have the least kinetic energy when rolling down a ramp?

Back

The golf ball.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Tags

NGSS.MS-PS1-1

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Tags

NGSS.MS-PS1-1

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

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

Back

A physical change does not alter the chemical composition, while a chemical change does.

Tags

NGSS.MS-PS1-2