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Science Quiz - Speed 02 (Questions)

Speed tells us how quickly something moves. Scientists use the formula speed = distance ÷ time, making it easy to compare cars, athletes, and even rockets.

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Fascinating Fact:

The fastest train in the world, a maglev in Japan, has reached over 370 miles per hour.

In KS3 Science, students investigate how speed is measured and applied. From sprinting to high-speed vehicles, speed links distance and time to explain how motion can be compared.

Key Terms

Speed: How fast something travels, worked out as distance divided by time.
Relative speed: The speed of one object compared to another, like two cars passing each other.
Uniform motion: Moving at a constant speed without speeding up or slowing down.

Frequently Asked Questions (Click to see answers)

How do you work out average speed in KS3 Science?

Average speed is found by dividing the total distance travelled by the total time taken, even if the speed changes during the journey.

What units are used for speed in science?

In science, speed is usually measured in metres per second (m/s). In everyday life, kilometres per hour (km/h) or miles per hour (mph) are common.

What is the difference between speed and acceleration?

Speed is how fast something moves. Acceleration is how quickly its speed changes, such as a car going from 0 to 60 mph in seconds.

Try These Related Quizzes

1.

If time is measured in seconds, speed in m/s, distance .......

[ ]	is in centimetres
[ ]	is in metres
[ ]	is in kilometres
[ ]	is in miles

2.

If time is measured in hours, speed in km/h, distance .......

[ ]	is in centimetres
[ ]	is in metres
[ ]	is in kilometres
[ ]	is in miles

3.

If time is measured in hours, speed in mph, distance .......

[ ]	is in centimetres
[ ]	is in metres
[ ]	is in kilometres
[ ]	is in miles

4.

A dog runs at 15 m/s for 30 seconds. How far does it travel?

[ ]	45m
[ ]	450m
[ ]	2km
[ ]	4.5km

5.

An athlete runs at 8 m/s for 1 minute. How far do they go?

[ ]	48m
[ ]	80m
[ ]	480m
[ ]	4.8km

6.

A car travels at 50 mph for 2 hours. How far does it go?

[ ]	10 miles
[ ]	50 miles
[ ]	100 miles
[ ]	100 kilometres

7.

A car travels at 40 mph for 60 minutes. How far does it go?

[ ]	40 kilometres
[ ]	40 miles
[ ]	60 miles
[ ]	240 miles

8.

A cyclist has a speed of 10 km/h. She cycles for 2 hours - how far does she go?

[ ]	5 kilometres
[ ]	12 kilometres
[ ]	20 kilometres
[ ]	25 kilometres

9.

A cyclist has a speed of 10 km/h. She cycles for 120 minutes - how far does she go?

[ ]	10 kilometres
[ ]	12 kilometres
[ ]	20 kilometres
[ ]	1,200 kilometres

10.

If a peregrine falcon flies at 90 km/h, how far could it fly in 20 minutes?

[ ]	4.5 kilometres
[ ]	18 kilometres
[ ]	30 kilometres
[ ]	1,800 kilometres

You can find more about this topic by visiting BBC Bitesize - Motion and speed

Science Quiz - Speed 02 (Answers)

1.

If time is measured in seconds, speed in m/s, distance .......

[ ]	is in centimetres
[x]	is in metres
[ ]	is in kilometres
[ ]	is in miles

This is the basic SI unit of distance

2.

If time is measured in hours, speed in km/h, distance .......

[ ]	is in centimetres
[ ]	is in metres
[x]	is in kilometres
[ ]	is in miles

You don't always need to express distance in metres per second, in fact it can sometimes be more helpful to know speeds in more familiar everyday units like km/h

3.

If time is measured in hours, speed in mph, distance .......

[ ]	is in centimetres
[ ]	is in metres
[ ]	is in kilometres
[x]	is in miles

Professional scientists would never use mph as a measure for speed in their experiments

4.

A dog runs at 15 m/s for 30 seconds. How far does it travel?

[ ]	45m
[x]	450m
[ ]	2km
[ ]	4.5km

15 m/s x 30 s = 450 m

5.

An athlete runs at 8 m/s for 1 minute. How far do they go?

[ ]	48m
[ ]	80m
[x]	480m
[ ]	4.8km

1 minute = 60 seconds, so distance = 8 m/s x 60 s = 480 m

6.

A car travels at 50 mph for 2 hours. How far does it go?

[ ]	10 miles
[ ]	50 miles
[x]	100 miles
[ ]	100 kilometres

Distance = 50 mph x 2 h = 100 miles

7.

A car travels at 40 mph for 60 minutes. How far does it go?

[ ]	40 kilometres
[x]	40 miles
[ ]	60 miles
[ ]	240 miles

60 minutes = 1 hour, so distance = 40 mph x 1 h = 40 miles

8.

A cyclist has a speed of 10 km/h. She cycles for 2 hours - how far does she go?

[ ]	5 kilometres
[ ]	12 kilometres
[x]	20 kilometres
[ ]	25 kilometres

Distance = 10 km/h x 2 h = 20 kilometres

9.

A cyclist has a speed of 10 km/h. She cycles for 120 minutes - how far does she go?

[ ]	10 kilometres
[ ]	12 kilometres
[x]	20 kilometres
[ ]	1,200 kilometres

120 minutes = 2 hours, so distance = 10 km/h x 2 h = 20 km

10.

If a peregrine falcon flies at 90 km/h, how far could it fly in 20 minutes?

[ ]	4.5 kilometres
[ ]	18 kilometres
[x]	30 kilometres
[ ]	1,800 kilometres

20 minutes = 20/60 = 1/3 hour, so distance = 1/3 h x 90 km/h = 30 km