Motion on Earth and Space

Question 1

To find the average speed of an object

Answer 1

Divide the total distance travelled by the time taken to travel the distance

Question 2

On a distance time graph, a horizontal line means…

Answer 2

that the objects is not moving (stationary)

Question 3

On a distance time graph a diagonal straight line means

Answer 3

That the object is moving with constant speed

Question 4

On a distance time graph a steeper line means

Answer 4

faster speed

Question 5

A curved line on a distance time graph means

Answer 5

that an object is speeding up or slowing down

Question 6

Relative speed is

Answer 6

The difference in speed between two moving objects

Question 7

If car A travels at 10m/s and car B overtakes them at 15m/s, what is the relative speed between car A and B

Answer 7

15m/s minus 10m/s = 5m/s relative speed

Question 8

Weight is the force of _________ acting on a mass

Answer 8

gravity

Question 9

Balanced forces mean

Answer 9

the forces acting on a object are equal in size but opposite in direction

Question 10

If forces are unequal in size but act in opposite directions they are called ____________

Answer 10

Unbalanced forces

Question 11

Friction always acts in this direction

Answer 11

opposite to the direction of travel. It opposes motion

Question 12

Examples of drag force

Answer 12

friction, air resistance, water resistance

Question 13

Define streamlined

Answer 13

a way of changing the shape of an object to reduce drag forces from air or water

Question 14

If an object has balanced forces it’s motion will be

Answer 14

Constant, either not moving or a constant speed

Question 15

If an object has unbalanced forces acting it’s motion will be

Answer 15

Changing speed, speeding up or slowing down

Question 16

Forces can be represented by these

Answer 16

Arrows, The size of the arrow tells us the size of the force

Question 17

The Earth takes this long to spin on it’s axis once

Answer 17

24 hours

Question 18

The Earth takes this long to travel once around the Sun

Answer 18

365.25 days

Question 19

Why do we have a leap year

Answer 19

A year is 365 days but it takes 365.25 days to travel around the Sun. Every 4 years we add a day to account for the extra quarter of a day

Question 20

Why do we have seasons?

Answer 20

The Earths axis is tilted at 23 degrees. In summer we are tilted toward the Sun. In winter we are tilted away

Question 21

When we have summer, what are people in the Southern Hemisphere (Australia) having

Answer 21

Winter

Question 22

The Moon takes this long to go around the Earth

Answer 22

28 days

Question 23

We see the moon because

Answer 23

It reflects the Sun’s light toward us

Question 24

The forces that makes the Earth go around the Sun and the Moon go around the earth

Answer 24

Gravity

Question 25

The Sun makes it’s own light. It is called

Answer 25

Luminous

Question 26

The closest Star to us

Answer 26

The Sun

Question 27

the name of the Galaxy we live in

Answer 27

Milky Way

Question 28

The equation to calculate weight from mass

Answer 28

Weight = mass x gravitational constant of the planet

Question 29

Mass and Weight. One of these remains constant even if you are on other planets or in space and one changes which is which?

Answer 29

Mass is always the same

Weight changes as it is how hard gravity pulls you down

Question 30

The reason our days are longer in summer than winter

Answer 30

The Earth’s axis is on a tilt