Magic Matter Unit 1

Front

A metal ball and a wooden cube are the same size, but the ball is heavier. What best explains this difference?

Back

The cube has less mass than the ball.

Front

What happens to the particles inside a balloon as it expands when air is blown into it?

Back

The number of air particles increases, and they push outward.

Front

How can you best explain that gases are matter, even though we cannot physically see them?

Back

Gases have mass and take up space, as shown when inflating a balloon.

Front

When ice cubes melt on a warm day, what phase change is taking place, and how does energy play a role?

Back

Solid to liquid; energy is being added to cause the change.

Front

When water boils and then cools, what phases does it go through and how does energy change in each step?

Back

Heat is added; liquid-gas. heat removed; gas-liquid.

Front

When sugar is stirred into water until it disappears, what kind of mixture is formed, and why?

Back

It is a solution because the sugar disolves completely.

Front

Energy is taken away from water when it _______.

Back

freezes

Front

What is the most efficient way to separate a mixture of sand, salt, and iron filings using their physical characteristics?

Back

Magnet, filter paper, evaporation dish.

Front

Why does sugar dissolve faster in warm water?

Back

Hot water molecules move faster, increasing the rate at which sugar breaks apart.

Front

A balloon filled with gas from a reaction weighs the same before and after. What does this reveal about matter?

Back

Mass is conserved when all substances are measured.