Unit 1 Test - Space

What force keeps the solar system together?

• Gravity
• Magnetism
• Solar wind
• Tides

The Sun appears to rise in the east and set in the west because of Earth's:

• Revolution
• Rotation
• Orbit
• Axis tilt

What is the primary reason Earth has seasons?

• The distance from the Sun changes
• Earth's rotation speed changes
• Earth's tilted axis
• The Moon’s gravitational pull

What is the term for the Sun, planets, and other objects orbiting the Sun?

• Universe
• Milky Way
• Solar System
• Nebula

What causes the phases of the Moon?

• Earth's shadow
• The Moon’s rotation
• The Moon’s orbit around Earth
• The Sun’s movement

What is a scientific theory?

• A guess that cannot be proven
• A well-tested explanation based on observations and evidence
• A random idea about how things work
• A fact that cannot be changed

What is a nebula?

• A large cloud of gas and dust in space
• A type of planet
• A star at the end of its life
• A small moon

What happens during a solar eclipse?

• Earth blocks sunlight from reaching the Moon
• The Moon blocks sunlight from reaching Earth
• The Sun disappears for a month
• The Sun moves closer to Earth

How long does it take for Earth to complete one full revolution around the Sun?

• 24 hours
• 30 days
• 365.25 days
• 365 days

Which type of eclipse occurs when Earth casts a shadow on the Moon?

• Solar eclipse
• Lunar eclipse
• Partial eclipse
• Penumbral eclipse