2nd grade states of matter

Question 1

Glaciers around the world are melting faster than they did 50 years ago. What does the ice race help explain?

• A. Glaciers are made of wax.
• B. Warmer surroundings make ice melt faster.
• C. Ice melts faster in the cold.
• D. Ice melts only at night.

Question 2

Can you turn a fried egg back into a raw egg by putting it in the fridge?

• A. Yes, if you wait a day.
• B. Yes, but only for brown eggs.
• C. Yes, cooling always undoes heating.
• D. No, cooking made a change that cannot be undone.

Question 3

Changes of state: which statement is true?

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

Question 4

You pour juice from a jug into a glass. What happens to its shape and volume?

• A. The shape changes but the volume stays the same
• B. Neither changes
• C. The volume changes but the shape stays the same
• D. Both change

Question 5

Why do ponds freeze on cold winter nights?

• A. The water cools below 0 °C and turns to ice.
• B. The fish make ice.
• C. The Moon cools the water.
• D. Snow falls into the pond and makes it solid all the way down.

Question 6

Which state of matter does this particle picture show?

• A. solid
• B. liquid
• C. gas

Question 7

True or false? Toast can be turned back into bread by cooling it.

• A. True
• B. False

Question 8

Can this change be undone: toasting bread?

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

Question 9

Steam rises from a boiling pot of pasta. What is the steam?

• A. melted metal
• B. smoke from burning pasta
• C. water that has turned into a gas
• D. air that turned white

Question 10

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

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

Question 11

Which change of state is this: a bathroom mirror steaming up?

• A. melting
• B. freezing
• C. evaporating
• D. condensing

Question 12

How many minutes longer did the ice take to melt on the shady porch than on the classroom table?

Answer min

Question 13

True or false? Water gets bigger and hotter when it freezes.

• A. True
• B. False

Question 14

True or false? Pouring milk into a different jug changes how much milk there is.

• A. True
• B. False

Question 15

What happens when you heat this: popcorn kernels in a pan?

• A. melts into a liquid
• B. rises and becomes a spongy solid
• C. burst open and puff up
• D. turns brown and crunchy

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 melt FASTEST?

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