NCFE - Practice - Earth, Moon, Sun Systems

1. Earth revolves around the Sun, and the Moon revolves around Earth. The Moon’s orbital path is sometimes above and sometimes below the plane of Earth’s orbit, as shown in the diagram below.
What would happen if Earth’s orbit and the Moon’s orbit were in the same plane?

• Eclipses would occur every month.
• The Moon would not have phases.
• All sides of the Moon would be visible from Earth.
• The same side of the Moon would always face the Sun.

Which of the following best explains why the Sun appears to move across the sky every
day?

• The Sun rotates on its axis.
• Earth rotates on its axis.
• The Sun orbits around Earth.
• Earth orbits around the Sun.

If you wanted to be able to look at the stars, the planets, and the Moon more closely, what
should you use?

• Telescope
• Periscope
• Microscope
• Magnifying glass

The Earth's Moon is

• always much closer to the Sun than it is to the Earth
• always much closer to the Earth than it is to the Sun
• about the same distance from the Sun as it is from the Earth
• sometimes closer to the Sun than it is to the Earth and sometimes closer to the
  Earth than it is to the Sun

What property of water is most important for living organisms?

• It is odorless.
• It does not conduct electricity.It is tasteless.
• It does not conduct electricity.
• It is liquid at most temperatures on Earth.

Which planet contains oceans and frozen ice caps?

• Jupiter
• Mars
• Earth
• Neptune

What planet has a very hot surface and is most like Earth in size?

• Venus
• Mars
• Mercury
• Uranus

When the people on Earth cannot see a moon, which phase is the moon in?

• Full Moon
• Waxing Crescent
• New Moon
• Waxing Gibbous

The chemical makeup of the Sun is

• hydrogen & oxygen
• oxygen & helium
• hydrogen & helium
• hydrogen, helium, & sulfate

Which is the eighth planet from the Sun?

• Earth
• Mars
• Jupiter
• Neptune