Sun, Moon and Earth

What is something all gas planets have?

• atmosphere

• metal core

• rings

• arsenic

The time it takes a planet to revolve 1 time around the sun is called a _____________.

• day

• decade

• month

• year

Ancient Greeks calculated that the stars are _________ than the other planets.

• closer

• farther

• more rocky

• smaller

The major source of energy for this planet (Earth) is _______.

• nuclear power

• fossil fuels

• the sun

• the milky way

The time it takes for a planet to rotate on its axis 1 time is ___.

• a day

• a week

• a month

• a year

Earth, Venus, Mercury and Mars are all considered ________.

• outer

• inner

Why does Earth stay in an orbit around the sun?

• gravity

• speed

• heat

Why does Earth have seasons?

• because the moon moves around the Earth

• because Earth's axis is tilted

• because the Earth gets closer to and then farther from the sun

• because the temperature of the sun changes

How long is 1 moon cycle for Earth?

• 7 days

• 1 day

• 14 days

• 28 days

What causes day and night?

• Earth's rotation on its axis

• the moon

• the tilt of the Earth's axis

• Earth's revolution around the sun