Space

Question 1

What is a planet?

Answer 1

A spherical object that orbits a star.

Question 2

What is a star?

Answer 2

A very large sphere of burning gas in space.

Question 3

State the name of the star the earth travels around.

Answer 3

The sun

Question 4

What word is used to describe the path an object takes around another object in space?

Answer 4

Orbit

Question 5

What name is given to the planets and other objects that orbit the sun?

Answer 5

The solar system.

Question 6

What shape do most planetary orbits have>

Answer 6

Elliptical.

Question 7

Name the planets in our solar system in order of distance from the sun.

Answer 7

Mercury, Venus, earth, mars, Jupiter, Saturn, Uranus, Neptune.

Question 8

What is an asteroid?

Answer 8

A small rocky object orbiting the sun.

Question 9

What is a comet?

Answer 9

An object made of rock, ice and dust orbiting the sun.

Question 10

What is a galaxy?

Answer 10

A group of billions of stars.

Question 11

What is the universe?

Answer 11

All objects in space together.

Question 12

What is a vacuum>

Answer 12

An area which has no particles.

Question 13

What is a light year?

Answer 13

The distance travelled by light in a year.

Question 14

How is a protostar formed?

Answer 14

The force of gravity pulls the dust and gas together.

Question 15

What word is used to describe the amount of material in an object.

Answer 15

Mass

Question 16

What is the unit and unit symbol for mass.

Answer 16

kilograms, kg.

Question 17

What is a field?

Answer 17

The area around an object where a non-contact force acts.

Question 18

What kind of field causes weight?

Answer 18

Gravitational field.

Question 19

How does mass change in the universe?

Answer 19

It does no change; it remains the same.

Question 20

How does weight change in the universe?

Answer 20

It depend on the gravitational field strength of a location.

Question 21

What type of force is gravity?

Answer 21

Non-contact force.

Question 22

Which two factors affect the weight of an object?

Answer 22

Mass and gravitational field strength.

Question 23

What is gravitational field strength?

Answer 23

How strong a gravitational field is.

Question 24

What is the gravitational field strength on Earth?

Answer 24

9.8N/kg.

Question 25

What is the unit and unit symbol for gravitational field strength?

Answer 25

Newtons per kilogram(N/kg)

Question 26

What is the symbol for weight?

Answer 26

W

Question 27

What is the unit and unit symbol for weight?

Answer 27

Newtons,N.

Question 28

What is the equation that relates to weight, mass and gravitational field strength?

Answer 28

W= m x g

Question 29

In what direction does gravity act?

Answer 29

Towards the centre of objects.

Question 30

What is a satellite?

Answer 30

An object that orbits a larger object in space.

Question 31

How long is a year on Earth in days.

Answer 31

365.25 days.

Question 32

What is the name of the imaginary line that goes vertically through the Earth?

Answer 32

Earth's Axis.

Question 33

What is the name for the imaginary line that goes horizontally through the middle of the Earth?

Answer 33

The equator.

Question 34

What causes day and night?

Answer 34

The earth spinning on it's axis.

Question 35

How long is a day on Earth in hours?

Answer 35

24 hours.

Question 36

What does the equator separate the world into?

Answer 36

North and South hemisphere.

Question 37

How far is the Earth axis tilted by?

Answer 37

23.4 degrees.

Question 38

What causes seasons?

Answer 38

Earth's tilted axis and it's orbit around the sun.

Question 39

Give three factors that are affected by seasons.

Answer 39

Average temperature, length of day, height of the sun in the sky.

Question 40

Explain how the titled axis affects light from the sun?

Answer 40

The more tilted the surfaced, the greater the area light must spread out over.

Question 41

If the North pole is tilted towards the Sun, what season will it be in the Northern hemisphere?

Answer 41

Summer.

Question 42

If the North pole is tilted towards the Sun, what season will it be in the southern hemisphere?

Answer 42

Winter.

Question 43

Why is it hotter in the hemisphere which is pointed to the sun?

Answer 43

The sunlight is concentrated.