The Universe

Question 1

What is the shape of most planets orbits?

Answer 1

Ellipses that are close to being circles

Question 2

What is the shape of most comets orbits?

Answer 2

Stretched ellipses with long orbital periods

Question 3

In which direction to comets tails point?

Answer 3

They always point away from the star they are orbiting

Question 4

Are satellites natural or artificial?

Answer 4

Both

Question 5

Name two natural satellites?

Answer 5

Earths moon and one of Jupiters moons Callisto

Question 6

Name two artificial satellites?

Answer 6

International space station and Landsat 7

Question 7

What is the orbital speed equation?

Answer 7

v=2πr/T

Question 8

What does v stand for in the orbital speed equation?

Answer 8

Orbital speed (m/s)

Question 9

What does r stand for in the orbital speed equation?

Answer 9

Orbital radius (m)

Question 10

What does T stand for in the orbital speed equation?

Answer 10

Time period (s)

Question 11

What has a gravitational field?

Answer 11

An object with mass

Question 12

What gives an object a bigger gravitational force?

Answer 12

A bigger mass

Question 13

What is weight?

Answer 13

Weight is the gravitational force between two objects

Question 14

What is the equation for weight?

Answer 14

W=mg

Question 15

What does W stand for in the weight equation?

Answer 15

Weight (N)

Question 16

What does m stand for in the weight equation?

Answer 16

Mass (kg)

Question 17

What does g stand for in the weight equation?

Answer 17

Gravitational field strength (N/kg)

Question 18

What does mass mean?

Answer 18

How much material makes up an object

Question 19

How does your mass differ if you moved from Earth to Jupiter?

Answer 19

It doesn’t

Question 20

How does your weight differ if you moved from Earth to Jupiter?

Answer 20

It gets greater as Jupiters mass is bigger therefore greater gravitational pull