Chemistry Unit 1 Test

Which option describes a phase change?

• Air leaking from a tire

• A helium balloon rising into the sky

• Gasoline evaporating into the air

• Plasma erupting from the sun

Which sentence explains why gases can change volume but liquids cannot?

• The forces holding atoms together are stronger in liquids than gas

• Gravity affects liquid atoms more than gas atoms

• Liquid atoms are more like solid atoms than gas atoms

• The forces holding liquid together are more flexible than those in a gas

What does the force of gravity between two objects depend on?

• The masses of the two objects and the distance between them

• Only the mass of the smaller object and its distance from the larger object

• Only the mass of the two objects

• The mass of the smaller object and the speed at which it's moving

Why is the force of gravity greater for an object orbiting Earth than for the same object orbing Pluto?

• Earth has a heavy atmosphere and Pluto doesn't

• Earth has only one moon, Pluto has three

• Earth is more massive than Pluto

• Earth is closer to the sun than Pluto

Which of the following is the energy of motion?

• Nuclear energy

• Chemical potential energy

• Gravitational potential

• Kinetic energy

Which of the following is a form of stored energy?

• Kinetic energy

• Heat energy

• Chemical potential energy

• Sound energy

Which object has stored gravitational potential energy?

• A mouse eating cheese

• A leaf hanging on a tree

• A lightbulb burning

• A car sitting in the driveway

Hands moving on a batter-operated clock is an example of what kind of energy conversion?

• Chemical potential energy being converted to kinetic energy

• Gravitational potential energy being converted to heat energy

• Kinetic energy being converted to chemical potential energy

• Heat energy being converted to gravitation potential energy

Water draining from a water tower is an example of what kind of energy conversion?

• Kinetic energy being converted to heat energy

• Gravitational potential energy being converted to kinetic energy

• Chemical potential energy being converted to heat energy

• Gravitational potential energy being converted into chemical potential energy

Lighting a match is an example of what kind of energy conversion?

• Kinetic energy being converted to chemical potential energy

• Gravitational potential energy being converted to heat energy

• Chemical potential energy being converted to gravitational potential energy

• Chemical potential energy being converted to heat energy