Why does the mass of a sealed jar of grass remain unchanged after a week?

• Because of gravity

• Because of thermodynamics

• Because nothing can eat it

• Because mass cannot be created or destroyed

Tags

NGSS.MS-PS1-5

What type of change occurs when a matchstick is lit?

• Chemical Change

• Physical Change

• Biological Change

• Nuclear Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a solution of saltwater, what is the substance that is dissolved?

• Sand

• Sugar

• Salt

• Water

What type of change occurs when an apple is cut into pieces?

• Physical Change

• Biological Change

• Nuclear Change

• Chemical Change

Which describes why crumbling paper is considered a physical change?

• Crumbing paper changes its shape and size but does not change its chemical composition.

• Crumbling paper involves a chemical reaction that releases energy

• Crumbling paper is an irreversible change

• Crumbling paper creates new substances that have different properties.

Is burning wood a chemical or physical change?

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is a physical change?

• sugar added to a cup of coffee

• the iron on a swing becomes covered with rust

Which is a characteristic of a physical change?

• Chemical bonds are broken

• A new substance is formed

• The process can be reversed

• Energy is released

Evidence of a chemical change shows that....

• an interaction between two gases

• a solid has dissolved in a liquid

• a new substance has been formed

• a change in the state of matter

Tags

NGSS.MS-PS1-2

Water melting in ice

• Physical change

• Chemical change

Tags

NGSS.MS-PS1-4