6.11

The four planets that orbit closest to the Sun are best described as 

• mostly made of gases
• having rings similar to Saturns
• having a rocky and terrestrial surface
• being composed entirely of water

Millions of pieces of rocky material of various sizes orbit the Sun between the orbits of Mars and Jupiter. These objects are known as 

• asteroids
• meteors
• comets
• planets

Galilean moons orbit which planet?

• Earth
• Mars
• Venus
• Jupiter

Which of the following planets could be accurately described as rocky, terrestrial, and relatively close to the Sun? 

• Jupiter
• Neptune
• Mars
• Saturn

Which celestial body is the center of our solar system, around which every object orbits? 

• Earth
• The Sun
• Jupiter
• The asteroid belt

Which of the following governs the motion of our solar system

• Magnetism
• Gravity
• Sunlight
• Friction

The gravitational pull of the Sun affects which of the following properties of the planets in our solar system? 

• Chemical composition
• Speed and shape of orbit
• Formation of land features
• Number of moons

Which two factors affect the strength of the gravitational pull on two objects? 

• Mass and density
• Weight and density
• Weight and distance
• Mass and distance

The orbital paths of objects in our solar system are the result of which of the following?

• the shape of the bodies and their chemical compositions
• the balance between the motion of the bodies and the gravitational forces
• the relative age of the bodies and their chemical compositions
• the frictional forces acting on the bodies when they hit space debris

The international space station is a huge science laboratory that orbits Earth every 92 minutes. Experiments on board the International Space Station can help scientists learn - 

• why Earth rotates on its axis every day
• what substances are found in moon dust
• when the first green plants appeared on Earth
• how to solve problems of living in space