Rotation & Revolution of the Earth

What is "Revolution"?

• The movement of a planet around a star.

• When Earth rotates on it's axis.

• The movement of a moon around a planet.

Answer explanation

The word "Revolution" was derived from a Latin word called "revolvere" which meant to revolve or to roll back.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

It takes _________ many days for Earth to complete a revolution around the sun.

Answer explanation

A year is not exactly 365 days... It's actually 365.2564 days.

Which one do you think is more important?

• Revolution

• Rotation

• They are equally important

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS2-6

At what speed does earth circle the sun?

• 29 km a second.

• 107,200 km an hour.

• 66600 miles per hour.

Answer explanation

You may think that earth is really fast, but if you were light's speed, you would take just a little over a second to go from Los Angeles to New York.

It takes______ hours for earth to complete 1 rotation on it's axis.

How long do you think it will take earth to travel 7918 miles?

Answer explanation

The correct answer is 7 minutes.

Draw an example of rotation.

The difference between rotation and revolution is:

• When a planet in in orbit, it is said to be revolving, whereas, a planet turning on it's axis is called rotating.

• There is no difference.

• When a planet is in orbit, it is said to be rotating, whereas, a planet turning on it's axis is called revolving.

Tags

NGSS.MS-ESS2-6

The term _______ is used to describe earth's motion (or orbit) around the sun.

About _____ billion years ago, the days on earth were only 18 hours 41 minutes.

Answer explanation

In a couple of million years, the days will be 25 hours instead of 24.