Space and Gravity

Question 1

What is gravity?

Answer 1

A force that attracts all masses.

Question 2

What does anything with mass do?

Answer 2

Attract anything else with mass.

Question 3

What keeps everything in orbit?

Answer 3

Gravity

Question 4

What is the correlation between the size of the body and the strength of the gravity?

Answer 4

Positive - the bigger the bodies, the stronger the force.

Question 5

What is the correlation between the distance of the bodies and the strength of the gravity?

Answer 5

Positive - the closer the bodies, the stronger the force.

Question 6

What does gravity give you?

Answer 6

Weight

Question 7

What is the difference between mass and weight?

Answer 7

Mass is how much matter there is in an object, while weight is mass x the gravitational pull.

Question 8

What is the formula for mass?

Answer 8

Mass = Weight x gravitational field strength

Question 8

Is weight the same everywhere?

Answer 8

No, it is dependant on the strength of the gravitational field.

Question 9

Is mass the same everywhere?

Answer 9

Yes

Question 10

What is mass measured in?

Answer 10

kg

Question 11

What is weight measures in?

Answer 11

N

Question 12

What is gravitational field strength measured in?

Answer 12

N/kg

Question 13

What does ‘g’ represent?

Answer 13

The gravitational field strength

Question 14

What is g = to on Earth?

Answer 14

Approx. 10N/kg

Question 15

What is g = to on Mars?

Answer 15

Approx. 3.7N/kg

Question 16

What is a planet?

Answer 16

Something which orbits around a star.

Question 17

What is the sun?

Answer 17

The star at the centre of our solar system.

Question 18

What do all planets move in?

Answer 18

Elliptical orbits (elongated circles)

Question 19

Are planets or stars luminous?

Answer 19

Stars

Question 20

What does the sun do?

Answer 20

Give out energy which is transferred by light.

Question 21

What is a galaxy?

Answer 21

A large collection of stars

Question 22

What is The Universe?

Answer 22

A collection of billions of galaxies.

Question 23

What is the Milky Way?

Answer 23

Our galaxy

Question 24

What is a light year?

Answer 24

A unit of distance - how far light travels in one year

Question 25

When are light years used?

Answer 25

When measuring huge distances, mainly in space.

Question 26

How long does it take for the Earth to do a full rotation?

Answer 26

24 hours

Question 27

What happens while the Earth rotates?

Answer 27

Sometimes it will be facing the sun in parts (daytime) and sometimes it won’t (night-time).

Question 28

How long does the Earth take to make a rotation around the sun?

Answer 28

365.25 days

Question 29

How do hemispheres and seasons correlate?

Answer 29

When it’s summer in one, it’s winter is the other.

Question 30

What is a satellite?

Answer 30

A body that orbits another body

Question 31

Give an example of a satellite?

Answer 31

The moon

Question 32

How long does it take for our moon to orbit us?

Answer 32

27 days

Question 33

Is the moon luminous?

Answer 33

No

Question 34

Why can we see the moon at night?

Answer 34

Because the sun’s light is reflecting off it.

Question 35

What are phases?

Answer 35

When the moon changes shape at different times of the month.

Question 36

Where does the sun appear to rise and set from?

Answer 36

East to West

Question 37

Does the sun move?

Answer 37

No Earth is moving.

Question 38

Where are shadows made? ALways the opposite side from

Answer 38

Always the opposite side from the sun.