What is the main force that keeps planets pulled toward a star? (This keeps it from continuing out to space in a straight line.)

What term describes an object at rest stays at rest?

The closer a planet is to the Sun, the gravitational force

Early models of the solar system were geocentric, which has the _________________ at the center of the solar system.

After Galileo used a telescope to see Jupiter's orbitting moons, the generally accepted model was called

What motion causes day and night on Earth?

What motion represents one day on Earth?

What motion represents one year on Earth?

As planets are farther from the Sun, the Revolution

What shape is Earth's orbit?

When the northern hemisphere is tilted towards the Sun, what season is it in PA?

When the northern hemisphere is tilted towards the Sun, what season is it in South America?

What two times will be equal daylight and nighttime hours?

(Choose 2)

What time will be the day with the least number of daylight hours?

What time will be the day with the most number of daylight hours?

What two things are necessary to have seasons on Earth? (Choose 2)

How long does it take for the Moon to travel around the Earth?

Why do we always see the same side of the Moon?

What are the dark spots on the Moon called?

What are the light spots on the Moon called?

You weight more on Earth than on the Moon because

Which moon phase is a waxing crescent?

Which moon phase is a waxing gibbous?

Which moon phase is a full moon?

Which phases are waxing?

Which phases are waning?

Light increasing means

Light decreasing means

When the Sun, Earth and Moon are in a straight line, we will have ____________ tides.

When the Sun, Earth and Moon are at a 90 degree angle, we will have ____________ tides.

What moon phases will give us a spring tide? (Choose 2)

What moon phases will give us a neap tide? (Choose 2)

This image is a ________________ eclipse.

Which planet is the hottest due to the Greenhouse Effect?

Which planet can float on water?

Which planet is known for its rings?

Which planet has the goldilocks effect?

Which planet is cratered and closest to the Sun?

Which planet is the largest in our solar system?

Which planet is the red planet?

What planet spins on its side?

What will you find between Mars and Jupiter?

What will you find past Pluto's orbit in the same plane as our solar system?

What is the sphere of comets way past the orbit of Pluto?

What type of star is our Sun?

What is the life cycle of our Sun?

What produces energy in the Sun's core?

Temperature and Luminosity is what we use to compare

Which planets are terrestrial planets?

Which planets are gas giants planets?

What qualities are common in gas giants? (2 answers)