I-Check 2 Review

I-Check 2 Review

Multiple Choice

Which option best demonstrates Revolution?

Revolution

• Definition: to travel around something else in a circular path; orbit 

• Earth travels AROUND the Sun in a circular path.

• It takes 365 days (1 year) for Earth to complete one revolution around the Sun.

Multiple Choice

Which option best demonstrates Rotation?

Rotation

• Definition: turning around on an axis 

• Earth spins on its axis once every 24 hours.

• This is why we have a day and a night.

Multiple Choice

How long does it take for the Moon to complete one lunar cycle.

• 2 weeks

• one month

• two months

• one year

Multiple Choice

How long does it take for the shape of the moon to go from a New Moon to a Full Moon?

• 2 weeks

• 1 month

• 2 months

• 1 year

Multiple Choice

What phase of the Moon occurs AFTER a New Moon?

• Waxing Crescent

• Waning Crescent

Multiple Choice

What phase of the Moon occurs AFTER a Full Moon?

• Waxing Gibbous

• Waning Gibbous

The Moon

• It takes the moon ONE MONTH to complete its cycle.

• Waxing (Crescent and Gibbous) means that you are seeing more of the Moon each night. (on way to first quarter and full moon)

• Waning (Crescent and Gibbous) means that you are seeing less of the Moon each night. (on way to third quarter and new moon)

Multiple Choice

Why can you see stars at night and not during the day?

• The Moon is too bright

• The Sun is too bright.

Multiple Choice

Where is Earth in its rotation when we experience night?

• Facing the Sun

• Facing away from the Sun

Multiple Choice

Why do we see different constellations in the winter sky from those we see in the summer sky.

• The stars move

• We see the same constellations all year round.

• We are facing different directions at night at different times of year.

STARS

• We can only see stars at night because the Sun is too bright to see them during the day.

• We see stars at night (when Earth is facing away from the Sun)

• Stars do not move. They seem like they are moving due to Earth's rotation on its axis.

• We see different constellations during the year because of Earth's revolution around the Sun.

Multiple Choice

What keeps Earth in its orbit around the Sun?

• The Sun’s gravity is pulling on Earth, but the Moon’s gravity is also pulling on Earth, so it stays in orbit.

• The magnetic attraction between Earth and the Sun keeps them both moving and at the same distance apart.

• A balance of Earth’s motion forward and the force of gravity between Earth and the Sun keeps Earth in orbit. (1 pt)

• The gravitational pull of Earth on the Moon keeps Earth in orbit around the Sun.

Earth and Gravity

• Remember the Ball and String Video: The hand pulled on the string. The string pulled on the ball. The ball traveled in a circular orbit.

• Gravity: the force of attraction between two objects

• The force of attraction between the Sun and Earth pulls hard enough to keep Earth in its orbit around the Sun.