The Sun is composed of -

• helium gas

• hydrogen gas

• solid iron

• molten rock

____________________ was the first man-made satellite.

• Friendship 7

• Apollo 11

• Gemini 2

• Sputnik 1

What force of attraction keeps the Earth in orbit around the Sun?

• revolution

• gravity

• magnetism

• rotation

The Earth _______________ on it's axis. This creates the _______________ cycle.

• rotates; seasons

• revolves; day-night

• rotates; day-night

• revolves; seasons

Which object in our solar system has the greatest gravitational pull?

• Jupiter

• the Milky Way

• Earth

• the Sun

Natural satellites that orbit a planet are called -

• dwarf planets

• moons

• asteroids

• comets

Why does a comet's tail glow?

• the Sun sets it on fire

• it reflects the Sun's light

• it heats up due to friction in the Earth's atmosphere

• it is made of lava

Which objects in our solar system have the most extreme elliptical orbit?

• planets

• moons

• comets

• asteroids

Why would it require more force to launch a rocket from Earth than it would to launch a rocket from the Moon?

• the Moon has more gravitational pull

• the Moon has a more elliptical orbit

• the Earth has a faster rotation

• the Earth has more gravitational pull

Which of the following statements is FALSE?

• the Sun orbits the Earth

• the Moon orbits the Earth

• the Earth orbits the Sun

• the Sun orbits the Milky Way