Science Quiz

What is the main source of energy for life on Earth?

• The Moon

• The Sun

• The Earth’s core

• The oceans

The Moon is a source of light.

• True

• False

How long does it take light from the Sun to reach Earth?

• 8 seconds

• 8 minutes

• 8 hours

• 8 days

What causes day and night?

• The Earth's orbit around the Sun

• The Moon blocking the Sun

• The Earth's rotation on its axis

• The Earth's tilt

What is an equinox?

• The longest day of the year

• The shortest day of the year

• A day when day and night are of equal length

• A day when the Sun is directly overhead at the poles

How long does it take for the Moon to complete one orbit of the Earth (approximately)?

• 7 days

• 14 days

• 28 days

• 365 days

What causes the phases of the Moon?

• The Moon's shadow

• The Earth's shadow on the Moon

• The Moon's position relative to the Earth and Sun

• Changes in the Moon's size

True or False: The Sun is the closest star to Earth.

• True

• False

What is the approximate diameter of the Earth?

• 4,000 km

• 12,700 km

• 20,000 km

• 40,000 km

How long does it take the Earth to orbit the Sun (approximately)?

• 24 hours

• 28 days

• 365 days

• 1000 days