Investigation 2 Review

Investigation 2 Review

Here are the things we learned how to do in this unit:

• 5.ESS1.1-  Support an argument with evidence that differences in the apparent brightness of the sun compared to other stars is due to their relative distances from Earth.

• 5.ESS1.2- Represent data in graphical displays to reveal patterns in the different positions of the sun, moon, and stars at different times of the day, month, and year.

• 5.PS2.1- Support an argument, with evidence, that Earth's gravitational force pulls objects downward towards the center of the earth.

Rotation and Revolution

• Rotation is the motion of spinning on an axis.

• Revolution is the motion of one object moving around another object.

• An ORBIT is the path an object follows as it revolves around something else

What does this picture show?

Multiple Choice

What does this picture show?

• Rotation

• Revolution

• Orbit

This picture shows rotation.

This shows that the Earth spins on its axis, causing day and night.

What does this picture show?

Multiple Choice

What does this picture show?

• Rotation

• Revolution

• Orbit

This picture shows revolution.

The arrows show the Earth moving around the Sun.

Multiple Choice

Why do the Sun, moon, and stars all appear to move across the sky?

• The Sun revolves around the Earth.

• The Earth, moon, and stars all revolve around the Sun.

• The Earth rotates on its axis, making it look like they are moving.

• The Sun, moon, and stars stay in the same position in the sky all the time.

The Earth's rotation makes it LOOK like the Sun, moon, and stars are moving across the sky,

but they are actually staying in about the same place.

Multiple Choice

About how long does it take for the moon to complete one revolution around the Earth?

• 1 day

• 1 week

• 1 month

• 1 year

It takes about 1 month to get through all of the moon's phases.

It takes about 2 weeks to get through each half of the cycle.

Multiple Choice

What holds planets and other objects in orbit around the Sun?

• The spinning motion of the planets makes them orbit 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.

• Objects in space naturally move in big circles.

• A balance of Earth’s motion forward and the force of gravity between Earth and the

  Sun keeps Earth in orbit.

Gravity is a pulling force that exists between two objects.

Because the Earth is moving, it would fly away from the Sun if the Sun's gravity didn't balance out our motion.

Multiple Choice

Why does the Sun appear so much brighter than the moon and other stars?

• The Sun is bigger than all other stars.

• The Sun is closer than all other stars.

• The Sun. is hotter than all other stars.

• The Sun steals light from other stars.

Our Sun is just an average star.

It appears bigger and brighter than other stars because it is so much closer to us.

The moon does not have any light of its own. It just reflects light from the Sun.

Multiple Choice

TRUE or FALSE:

We can see the Moon only at night because it is on the other side of the Sun during the day.

• TRUE

• FALSE

We are only able to see the side of the moon that is lit up by the Sun. This is easiest to see at night, but sometimes we see it in the day as well.

Multiple Choice

Which motion best explains why we see different stars in the winter sky than we do in the summer sky?

• The rotation of Earth on its axis.

• The revolution of the moon around Earth.

• The rotation of our entire galaxy.

• The revolution of Earth around the Sun.

As Earth revolves around the Sun, the night side of Earth faces different directions.

The stars that we see in different seasons are on different sides of the Sun.