Free Printable CHAPTER 3.2

Worksheets

CHAPTER 3.2

Total questions: 25

Worksheet time: 14mins

Name

Class

Date

Kepler's first law states that the orbits of the planets are oval in shape or

ellipses

perfect circles

Kepler's 2nd Law deals with

the shape of the planets' orbits

the speed/area the planet travels

the length of time it takes the planet to orbit the sun

Planets orbit the Sun in a shape called a(n)

circle

ellipse

focus

perihelion

Where is the planet moving faster

Position A to B

Position B to C

Position H to I

Position I to J

The speed at which any planet moves through space is constantly changing. In a perfectly circular orbit, the orbital radius of the planet would be constant and therefore so would be its observed angular velocity. In elliptical orbits, the velocity varies. In elliptical orbits, the orbital radius of the satellite will vary and therefore so will its velocity. The planet travels "faster" when closer to the Sun, then "slower" at a more distant radius. According to Newton's 2nd Law, what is the underlying force behind this change in velocity?

Friction

Gravity

Mass

Projectile motion

Kepler’s 3rd law states the square of the orbital period is proportional to the cube of the orbital radius. (T²=r³)

If a planet's orbital radius is doubled, what happens to the length of a year on that planet?

It will become twice as long

It will become about 8 times as long

It will become 2.8 times as long

It will remain the same

Kepler’s first law states that planets travel in a(n) orbit.

Circular

Spherical

Elliptical

Triangular

Where is the planet moving faster

Position A to B

Position B to C

Position H to I

Position I to J

Kepler's 2nd Law deals with

the shape of the planets' orbits

the speed/area the planet travels

the length of time it takes the planet to orbit the sun

10.

A planet moves __________ when it is farthest from the sun.

faster

slower

11.

The farther away a planet is from the sun, the _______ it takes it to orbit the sun once.

longer

shorter

12.

The path a planet travels around the sun is called its

orbit

ellipse

barycenter

precession

13.

What are the two factors that influence gravity the most?

Mass and weight

Weight and gravity

Mass and distance

Weight and distance

14.

When do planets move the fastest?

Close to the sun

Far away from the sun

15.

When Earth orbits around the sun, it slows down when it is close to the sun. It speeds up its orbit when it is further from the sun. This is because the sun's gravity is stronger when you are closer to it.

Kepler's 1st law

Kepler's 2nd law

Kepler's 3rd law

Nutation

16.

What did Kepler discover about planets and their orbital speed?

Planets closest to the Sun will orbit with the fastest orbital speed.

Planets with the greatest mass will orbit the Sun with the fastest orbital speed.

Planets furthest from the Sun will orbit with the fastest orbital speed.

Planets with the least mass will orbit the Sun with the fastest orbital speed.

17.

Planets orbit the sun in a shape called an ellipse.

Kepler's 1st Law

Kepler's 2nd Law

Kepler's 3rd Law

18.

Planets travel faster when they are closer to the sun.

Kepler's 1st Law

Kepler's 2nd Law

Kepler's 3rd Law

19.

Kepler's 3rd law tell us that __ would be dependent on __.

orbital period ; distance

distance ; orbital period

20.

The planets in our solar system all have ______________ orbits.

spherical

elliptical

circular

highly eccentric

21.

Which statement best describes Kepler’s 2^nd Law of Planetary Motion?

Planets revolve around the sun over equal areas in equal time intervals.

Planetary orbits are in the shape of an ellipse.

A planet’s orbital period is proportionate to its distance from the sun.

22.

Which statement best describes Kepler’s 2^nd Law of Planetary Motion?

Planets revolve around the sun over equal areas in equal time intervals.

Planetary orbits are in the shape of an ellipse.

A planet’s orbital period is proportionate to its distance from the sun.

23.

An orbital period is the time (in Earth time) a planet _______________ .

to complete one orbit around the sun

revolves around the solar system

Experiences a season

24.

Which statement best describes Kepler’s 3^rd Law of Planetary Motion?

The closer a planet is to the sun, the shorter the orbital period is.

Planetary orbits are in the shape of an ellipse

The closer a planet is to its star, the lesser its orbital velocity.

25.