Physical and Chemical Changes

Lighting a match is a...

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Slicing bread is a...

• Physical Change

• Chemical Change

Some chemical reactions require a substance called a catalyst. The main purpose of a catalyst is...

• To warm up the reaction

• To speed up the reaction

• To create more reactants

• To stop the reaction

Tags

NGSS.HS-PS1-5

Baking a cake is a...

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Ice (solid) can change to a liquid (water). This is a demonstration of a ______________________.

• physical change

• chemical change

• neither

• density

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

How do you know that rusting is a chemical change?

• it changes color

• atoms were rearranged to form a new substance

• we just know

• the rust

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

True or False: All atoms are created or destroyed in a chemical reaction.

• true

• false

• maybe

Tags

NGSS.MS-PS1-5

Sometimes I notice rust on the metal part of the nozzle of my garden hose, how or why scientifically does this happen?

• water running through the nozzle causes it to rust

• rust or corrosion appear on metals over time

• nozzle was damaged and exposed to water

• iron in metal nozzle combined with oxygen in the air to form rust or iron oxide

When we combine baking soda and vinegar, it fizzes and eventually turn into a liquid. What is actually happening?

• baking soda melted into its liquid form

• baking soda combined with the vinegar produced a new substance

• evaporated into the air

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The following are examples of evidence of a chemical reaction....

• ice melting into a liquid

• condensation

• endothermic reaction

• change in color, production of gas bubbles

Tags

NGSS.MS-PS1-2