SY25_PGB_Grade 2_Science_Checkpoint 8

Stars can be many different colors. Stars are different colors because their color shows

• how old the star is.

• the size of the star.

• the time of the night they are seen.

• the surface temperature of the star.

Which of the following is an example of a liquid changing to a solid?

• Water freezing

• Wax melting

• Steam rising from boiling water

A force that moves objects away is called a (a)   .

• direction

• push

• gravity

• pull

Keisha is pushing her brother on the swing. What is she using?

• force

• friction

• direction

Which of these lists are the correct states of matter?

• solid, liquid, brick

• solid, liquid, water

• solid, liquid, gas

• jelly, water, solid

Which property of orange juice classifies it as a liquid?

• The juice comes from a fruit.

• The shape does not change.

• The liquid takes the shape of the container it’s in.

The sun is (a)   .

• a hard rocky planet

• just like the moon

• a ball of hot gases that gives off light

The sun provides the earth with (a)   and (b)   .

• movement and liquids

• light and heat

• gravity and friction

What will change a liquid to a gas?

• Adding cold air

• Adding heat energy

• Adding more liquid

Some stars burn hotter and some stars burn colder than others. What does this cause?

• This causes stars to move in the sky.

• This causes stars to be different colors.

• This causes there to be more stars in some places than others.