2nd grade states of matter

Question 1

True or false? Heating can cook food and change it for good.

• A. True
• B. False

Question 2

True or false? Steam turns back into water when it touches something cold.

• A. True
• B. False

Question 3

Which of these is a gas?

• A. water
• B. ice
• C. wood
• D. the air we breathe

Question 4

Changes of state: which statement is true?

• A. The water on the outside of a cold can leaks through the metal.
• B. Water evaporates faster on a warm, windy day.
• C. Melting makes a substance lose mass.
• D. Water only evaporates when it boils.

Question 5

What is the name for a change from liquid to solid?

• A. evaporating (or boiling)
• B. condensing
• C. melting
• D. freezing

Question 6

Is this a solid or a liquid: cooking oil?

• A. solid
• B. liquid

Question 7

Can this change be undone: burning a log on a fire?

• A. can change back
• B. cannot change back

Question 8

How many minutes longer did the ice take to melt on the shady porch than on the sunny windowsill?

Answer min

Question 9

True or false? Liquids can be poured.

• A. True
• B. False

Question 10

What happens when you heat this: water in a kettle?

• A. rises and becomes a spongy solid
• B. boils and turns to steam
• C. burst open and puff up
• D. turns white and firm

Question 11

Honey and water are both liquids. How are they different?

• A. Water cannot be poured.
• B. Honey is a gas.
• C. Honey flows much more slowly (it is thicker).
• D. Honey keeps its shape like a solid.

Question 12

The picture shows the particles in a substance. Is it a solid, a liquid or a gas?

• A. solid
• B. liquid
• C. gas

Question 13

Ice cream is left in the sun and melts. Then it is put back in the freezer. Is it the same as before?

• A. It freezes solid again, though it may be icier and harder than before.
• B. It stays a liquid in the freezer.
• C. It burns.
• D. It turns into milk powder.

Question 14

What happens when this cools down: warm jelly mix in the fridge?

• A. turns into water droplets
• B. sets into a wobbly solid
• C. freezes into ice
• D. turns back into solid wax

Question 15

Three of these changes CAN be undone. Which one is different?

• A. baking a cake
• B. candle wax melting
• C. an ice lolly (popsicle) melting
• D. water freezing into ice cubes

Question 16

Four ice cubes of the same size were put in different places. The chart shows how many minutes each took to melt. Where did the ice last LONGEST?

• A. sunny windowsill
• B. classroom table
• C. shady porch
• D. fridge