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

I mixed sand and iron filings together. I created a mixture, which is a physical change. What is the best way for me to separate the sand from the iron filings?

• pour water over it

• freeze the mixture

• pour the mixture through a mesh screen

• pull a magnet through the mixture

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

I put strawberries, bananas, ice cream, and milk into a blender. I blended it for 60 seconds. I poured it into a glass and then added whipped cream and a cherry to the top! What kind of change is this?

• physical change

• chemical change

Select 3 examples of PHYSICAL changes

• burning wood

• tearing or ripping paper

• cutting wood

• frying eggs

• evaporating or boiling water