Chapter 6 Science

What keeps the planets in their orbit around the sun?

• ellipse
• gravity
• gravity and inertia
• gravity

What advice would you give a student who wanted to build an accurate model of the solar system?

• build a model that has an extra planet, just in case
• build a model that has all the stars in our galaxy
• build a model that is straight rather than round
• build a model that is more round than straignt

Which planet has the greatest surface gravity?

• Earth
• Saturn
• Neptune
• Jupiter

Which planet has the right conditions to support life?

• Saturn
• Moon
• Mars
• Earth

What would happen to Pluto's orbit if the Sun's gravity decreased by half?

• It would stay the same
• It would be drawn towards the Sun
• It would move further from the Sun
• It would stop moving

What is the largest body in the solar system?

• asteroid
• Earth's moon
• Sun
• Earth

Which unit of measure would be most appropriate for measuring distances between the Sun and the planets?

• kilometers
• miles
• astronomical units
• cubic miles

What is the difference between a moon and a satellite?

• a satellite is man-made
• The Moon is a small piece of Earth
• They can be the same thing
• Each planet has only one moon

Which of the following are mixtures of frozen gases, ice, dust, and rock that move in an irregular circle around the Sun?

• meteorite
• comet
• planetessimal
• asteroid

Planets keep orbiting around the Sun by

• orbital attraction
• molecular attraction
• magnetic attraction
• gravitational attraction