Science Quiz 1

Water has been left in a pot on a hot stove. Bubbles form throughout the liquid and rise to the top. Which type of change is this?

• evaporation

• Boiling

• Melting

• Condensation

Temperature is a measure of ____ of the particles in an object.

• the difference between the potential energy and kinetic energy

• the sum of the potential energy and kinetic energy

• the average potential energy

• the average kinetic energy

When a substance is heated, the particles gain energy and move apart, increasing the volume. The mass of the substance being heated _______.

• increase

• decrease

• stays the same

• varies unpredictably

Bars of different metals are all heated to 100°C to determine how their volume and length would be affected. Which statement describes the most likely outcome of this experiment?

• All of the volumes change and so do their lengths

• All of the volumes change, but the lengths remain the same.

• The volumes and lengths do not change.

• All of the volumes change the same amount and the lengths remain constant.

A liquid thermometer works because liquid ____ when warmed.

• expands

• contracts

• solidifies

• condenses

Which of the following would cause the particles to spread out faster in the  liquid?

• freezing the mixture

• removing heat energy

• adding heat energy

• decreasing the temprature

When particles move faster they bump into each other and need more space. This is called ____.

• Random motion

• diffusion

• thermal expansion

• thermal contraction

The movement of substances from an area of high concentration to an area of low concentration.......

• diffusion

• particles

• kinetic energy

• temperature

Most highway bridges are built with expansion joints that can move back and forth. What is the reason for this?

• expansion joints are cheaper than stationary joints

• there is no real good reason to use expansion joints

• the materials that make up the bridge will expand and contract with changes in temperature

• all of the above

What happens to particles when heat is removed from them?

• They slow down and get closer together

• They speed up and spread out

• They stop moving

• They move closer together and speed up