Universe/Solar System Review

Earth's 24 hour day is caused by its _____. 

• revolution around the sun
• rotation on its axis
• moon's orbiting around it
• eclipsing the sun

What is the hottest planet in our solar system (because of its extreme greenhouse effect)?

• Earth
• Mercury
• Venus
• Neptune

What would happen to the gravitational pull between the sun and Earth if Earth were CLOSER to the sun?

• The gravitational pull between these two objects would decrease.
• There would be no change in the gravitational pull. 
• The gravitational pull would no longer exist with any change in distance. 
• The gravitational pull between these two objects would increase.

A ______ is a space rock that burns up in Earth's mesosphere. 

• meteoroid
• meteor
• meteorite
• comet

Which planet contains the Great Red Spot?

• Neptune
• Saturn
• Earth
• Jupiter

What keeps the planets in orbit around the sun?

• Gravity and inertia combined
• Only gravity
• Only inertia
• Gravity, inertia, and acceleration

Which statement is true about a comet?

• Its tail is always present no matter where it is in the solar system. 
• It is smaller than meteor.
• Its tail forms as it approaches the sun and always blows away from the sun.
• Its tail forms in the Oort cloud and always blows towards the sun.

Where is the large collection of asteroids located?

• between Earth and Mercury
• just outside our solar system
• between the orbits of Mars and Jupiter
• beyond the Oort cloud

What is the largest object in our solar system?

• the sun
• Jupiter
• Neptune
• Uranus

A planet's year is created by

• the number of seasons it has.
• its rotation on its axis.
• its revolution around the sun.
• the number of moons it has.