Unit 7 Our Solar System and Beyond I UNIT TEST

Which forms of alternative energy derive from the energy in sunlight?

• biofuels

• wind

• all of the above

• hydroelectric

What is the first step in converting the energy in sunlight to the energy in fossil fuels?

• Energy in sunlight must be stored as chemical energy in plants.

• Energy in sunlight must be stored as kinetic energy in molten rock.

• Energy in sunlight must be stored as electrical energy in seawater.

• Energy in sunlight must be stored as thermal energy in the atmosphere.

Which form of energy was transformed to the chemical energy stored in fossil fuels?

• sunlight

• motion

• nuclear

• heat

Which energy conversion is primarily responsible for the formation of fossil fuels?

• chemical energy transformed to kinetic energy

• kinetic energy transformed to heat energy

• light energy transformed to chemical energy

• heat energy transformed to chemical energy

What process converted light energy from the sun to the chemical energy stored in plants?

• decay

• compaction

• photosynthesis

• weathering

What form of energy does a hydroelectric generator convert to electrical energy?

• heat energy

• nuclear energy

• kinetic energy

• chemical energy

Sunlight heats Earth's surface and the molecules in air. This eventually gives rise to wind energy. Which sequence of energy changes describes how radiant energy in sunlight becomes energy in wind?

• radiant energy → gravitational potential energy

• radiant energy → thermal energy → kinetic energy

• radiant energy → chemical potential energy → kinetic energy

• radiant energy → chemical potential energy → gravitational potential energy

Which energy transformation results in wind energy?

• heat energy light energy → kinetic energy

• light energy → kinetic energy → heat energy

• kinetic energy → heat energy → light energy

• light energy → heat energy kinetic energy

Sunlight heats water on Earth's surface. The water eventually is changed to vapor in clouds. Which sequence of energy changes best describes how radiant energy in sunlight becomes energy in rainwater?

• radiant energy → thermal energy chemical potential energy kinetic energy

• radiant energy → chemical potential energy → gravitational potential energy

• radiant energy → thermal energy → kinetic energy → gravitational potential energy

The nebular theory is the most widely accepted theory about the formation of the solar system. Look at the tiles below and drag the statements that are in agreement with the nebular theory.

• The force of gravity pulled the particles in the nebula towards one another, forming a rotating disk.

• The sun's great mass formed from the matter pulled in from all parts of the nebular cloud.

• As the nebular particles moved closer together, intense pressure blew them apart.

• A gigantic cloud of gas and dust collapsed.