Physical and Chemical Properties, Changes and Reactions

Photosynthesis is an example of a

• physical change

• chemical change

Tags

NGSS.MS-LS1-6

Dissolving sugar in water is an example of a 

• physical change

• chemical change

The melting of wax is an example of a

• chemical change

• physical change

Which is an example of a chemical reaction?

• paper cut into small pieces

• chocolate melting in a pan

• flour and sugar mixed in a bowl

• cookies baking in an oven

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Change in color is a physical change.

• True

• False

Tags

NGSS.MS-PS1-2

Digesting your food is an example of 

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following help a chemical reaction to happen faster?

• Molecule

• Catalyst

• Atom

• Density

Which observation(s) might be used as evidence that a chemical reaction occurred?

• Color change

• Properties change

• Odor change

• All the above

Tags

NGSS.MS-PS1-2

Which is an example of a chemical change?

• Burning wood

• Cooking food

• Rust on a car

• All of the above

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

If you start a chemical reactions with 5 atoms of helium, how many atoms will you have after?

• 4 atoms

• 1 atom

• 10 atoms

• 5 atoms

Tags

NGSS.MS-PS1-5