Camping- Chemical vs Physical Change

A marshmallow is toasted over a fire. It turns a golden brown and caramelizes on the outside. It begins to melt on the inside. What type of change on the outside is the marshmallow undergoing?

• chemical change

• physical change

Tags

NGSS.MS-PS1-4

A marshmallow is toasted over a fire. It turns a golden brown and caramelizes on the outside. It begins to melt on the inside. What type of change on the inside is the marshmallow undergoing?

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which reaction is a chemical change?

(s- solid)

(l- liquid)

(g- gas)

• H₂O (s) ------> H₂O (l)

• 2H₂0 (l) -----> 2H₂ (g) + O₂ (l)

Tags

NGSS.MS-PS1-2

Liam, Charlotte, and Michael are studying chemistry together. They are discussing about physical and chemical changes. Liam says that when ice melts into water, it's a physical change. Which of the following reactions represents Liam's statement?

(s- solid)

(l- liquid)

• CH₄ + 20_{2 ----->} CO₂ + 2H₂O

• CaO + H₂O ----> Ca(OH)₂

• H₂O (s) ------> H₂O (l)

• 2H₂0 -----> 2H₂ + O₂

Tags

NGSS.MS-PS1-4

Which of the following is a chemical reaction?

• painting a chair

• scratching a piece of wood

• boiling water

• a bike rusting

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A chemical change always involves...

• a color change

• a change in shape

• the state of matter changing

• a new substance forming

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a physical change, the _______ does not change.

• temperature

• chemical composition

• state of matter

• mass of material

All physical changes can be identified at the macroscopic level (with your eyes).

• true

• false

After Henry melted a piece of ice into water, the substance still had the same ________.

• chemical properties

• volume

• mass

• state of matter

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Can only chemical changes release heat?

• Only combustion like a camp fire can release heat.

• Both physical and chemical changes can release heat.

Tags

NGSS.MS-PS3-3