What happens to the balloon when it is placed in hot water?
The balloon swells up.
The balloon shrinks.
The balloon stays the same size.
The balloon pops.
I am ....................learning new words in English class.
unfairly
kindly
unfortunately
constantly
Which statement is true about hot air molecules?
They move closer together.
They take up less space.
They move slowly.
They are more active.
What is true about cool air molecules?
They take up more space.
They are more spread out.
They move slowly.
They are more active.
The amount of an area that is empty or available.
Space
Bottle
Period
Molecule
What happens to air molecules when the temperature gets hotter?
They get bigger in size.
They stay the same and don't change.
They move faster and spread out more.
They move slower and get closer together.
What is special about air molecules?
They are easy to see.
They are very large.
They are constantly moving.
They are always still.
The new bookcase ......................... too much space in my room.
swells up
expands
shrinks
takes up
I need to ............. before I start exercising at the park.
spread
shrink
expand
stretch
How do air molecules behave when the temperature gets colder?
They start to disappear.
They stay the same and don't change.
They move slower and take up less space.
They move faster and take up more space.
I found a .................... kitten hiding under the porch.
tiny
stiff
active
huge
Which of these is true about warmer air molecules?
They stay the same and don't change.
They are less active and closer together.
They are more active and spread out.
They move faster but take up less space.
The sweater ..................... in the dryer and now it's too small.
swelled up
expanded
shrank
stretched
The car is in ................ as it drives down the street
disguise
motion
mixture
competition
Why is air important for living things?
It helps them breathe.
It helps them see.
It helps them move.
It helps them grow.
The cake recipe calls for a ....................of flour and sugar.
motion
mistake
mixture
molecule
Heating air molecules causes them to spread out.
TRUE
FALSE
The balloon started to ................. as the air escaped.
stretch
spread
shrink
expand
What happens to the air molecules when they get colder?
They become more spread out
They move farther apart
They move closer together
They disappear
Air molecules move differently depending on the .............................
size
motion
space
temperature
My ankle began to ....................... after I fell.
swell up
crash into
glare at
point at
.......................is the act or process of moving.
Mixture
Motion
Molecule
Motivation
Can you .................... your arms out as far as you can?
shrink
swell up
stretch
expand
I am ...........................late for school every day.
constantly
simply
differently
slowly
Putting the balloon in hot water makes it shrink.
TRUE
FALSE
The population of the city continues to .................. rapidly.
stretch
challenge
expand
brag