Physical and Chemical Changes

What is true of the solid in this picture?

• the water becomes a solid when the temperature is below 0° C

• The solid will boil at 0 degrees Celsius (0° C)

• The solid will evaporate at 0 degrees Celsius (0° C)

• The solid will melt at 0 degrees Celsius (0° C)

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

I baked a cake for Mrs. Haley's birthday. The cake batter turned from a thick liquid to a spongy solid. Which of the following explains why a chemical change took place?

• water vapor was released when it was in the oven

• I cannot change the baked cake back into raw cake batter

• the cake changed from a liquid to a solid

• some of the cake batter was boiled and released as a gas

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

When ice comes out of the freezer it is being heated because the temperature outside the freezer is warmer than the temperature inside the freezer.

What is happening to the ice as it is being heated?

• It is changing from a liquid to a solid

• it is changing from a solid to a gas

• it is changing from a liquid to a gas

• it is changing from a solid to a liquid

Tags

NGSS.4-PS3-2

My mom told me to put my bike away, but I didn't listen to her. My bike got left out in the rain. What will most likely happen to my bike?

• A chemical change will cause my bike to MELT

• a chemical change will cause my bike to BURN

• A chemical change will cause the surface of my bike to turn red or RUST

• A chemical change will cause my bike to DECAY

Tags

NGSS.MS-PS1-2

My dad and I were making spaghetti together. I was in charge of the noodles. I filled up a pot with water and put it on the stove and turned the burner on high. I walked away to watch my favorite show. What is the most likely thing that I observed when I went back to the stove 20 minutes later?

• The water had turned to solid ice.

• All the water evaporated or turned to a gas and there was no liquid left in the pot.

• The pan melted on the stove.

• The water was colder.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which of these is an example of a physical change?

• cookies baking

• a burning candle

• melted candle wax

• a rusting bike

Which of these is an example of a chemical change?

• melted ice

• water boiling and turning into water vapor

• mixing Kool-Aid into water

• frying an egg

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

My friend makes the coolest paper air planes. When he folds the paper and makes a paper airplane, what kind of change is that?

• Physical change

• chemical change

How can I change a liquid to a gas?

• increase the temperature (make it warmer)

• decrease the temperature (make it colder)

Select 3 examples of PHYSICAL changes

• burning wood

• tearing or ripping paper

• cutting wood

• frying eggs

• evaporating or boiling water