Whiteboard Activity Speed, Distance, Time Science KS3

[Pages:5]Whiteboard Activity Speed, Distance, Time Science KS3

National Curriculum Reference: Science Key Stage 3; Physical processes Sc4 2a

Aim: To develop understanding of the equations used to calculate the speed of the different RNLI rescue boats.

Objectives: To determine the speed of a moving object and use the quantitative relationship between speed, distance and time.

Assessment/Success Criteria: Most pupils will find it straightforward to relate the measurement of distance and time to the determination of speed. Others will need more practice.

Teacher Notes: Use the triangle to help pupils remember the equations.

Resources: Internet access to .uk/Shorething/Adults/Downloadable_Resources/default.aspx Worksheet: Distance - Time Worksheet: Speed and Motion

Key Vocabulary: Distance

Speed

Equation

Calculation Solution

.uk/shorething

Whiteboard Activity Speed, Distance, Time Science KS3

Lesson Plan:

Timing 5 mins

Section Introduction

10-15 mins

Whole class activity

Activity Introduce the students to the triangle formula and explain how it works. Distance is in the top corner, speed lower left and time lower right. Give out the worksheet entitled triangle. Explain that to use the triangle effectively pupils should cover the quantity they want to find and then work it out. Explain that if we know the distance travelled and the time taken we can calculate the speed. Speed = distance ? time. To find the Distance = speed x time To find the Time = distance ? speed Give some examples for them to work out e.g. If a boat travels 200 km in 4 hours, how fast was it travelling

Open the whiteboard activity. Explain that in each rescue the pupils have to choose the craft which they think will reach the emergency first. Please point out that these times are hypothetical to make the exercise more interesting.They will need to use a calculator and work out all three times before making their decision. If using stand alone computers you may wish the pupils to work in small groups. Continue to work through the exercise until you feel confident that pupils are showing understanding.

10 mins

Individual work

Give out copies of the worksheet Speed and Motion. Explain that they will need to use the formula to work out each answer.

15 mins 10 mins

Group or paired work activity

Give out a copy of the worksheet entitled Distance - Time and discuss the journey.What do we know about how the bus travelled? At what points was it stationary? At which points did it move at its fastest? After discussing the sheet, ask pupils to work with a partner to develop their own distance ? time graphs with relevant questions. Once complete exchange graphs with another pair and work them out.

Plenary

Assess how pupils choose the correct calculation by looking at different problems e.g. If you walk at a steady pace of 2 metres per second for 30 minutes (30 x 60 = 1800 seconds), calculate the distance. Is the answer?

3600 metres 3800 metres 3400 metres

.uk/shorething

Whiteboard Activity Speed, Distance, Time Science KS3

Speed and Motion Worksheet

Use the triangle to help you remember the equations. Cover the quantity you want to find and the triangle will show you how to work it out.

d s x t

1. A car is travelling at 70 mph. It travels for half an hour. How far has it gone?

2. A car took 20 minutes to travel ten miles.What was its average speed?

3. How long would it take a car to travel 20 miles if its average speed is 60 mph?

4. If a car is travelling at 50 mph how long would it take for the car to travel 12.5 miles?

5. A car travels at 45 mph for 4 hours. How far has it travelled?

6. If a car travels at 15 mph for 20 minutes, how far has it travelled?

7. A motor bike was travelling in heavy traffic at an average speed of 24 mph. How far had it travelled after 10 minutes?

8. A car took 9 minutes to travel 3 miles. How fast was it travelling?

9. Town A is 10 miles away. Town B is 15 miles away. Town C is 20 miles away.

If a car travels at an average of 35 mph, which town or towns could the car visit in 2 hours?

10. How long would it take a car to travel 24 miles if it was averaging 45 mph? Speed and Motion Worksheet Answers

Use the triangle to help you remember the equations. Cover the quantity you want to find and the triangle will show you how to work it out.

.uk/shorething

Whiteboard Activity Speed, Distance, Time Science KS3

1. A car is travelling at 70 mph. It travels for half an hour. How far has it gone? 35 miles

2.A car took 20 minutes to travel ten miles.What was its average speed? 30 mph

3. How long would it take a car to travel 20 miles if its average speed is 60 mph? 20 minutes

4. If a car is travelling at 50 mph how long would it take for the car to travel 12.5 miles? 15 minutes

5. A car travels at 45 mph for 4 hours. How far has it travelled? 180 miles

6. If a car travels at 15 mph for 20 minutes, how far has it travelled? 5 miles

7. A motor bike was travelling in heavy traffic at an average speed of 24 mph. How far had it travelled after 10 minutes? 4 miles

8. A car took 9 minutes to travel 3 miles. How fast was it travelling? 20 mph

9.Town A is 10 miles away. Town B is 15 miles away. Town C is 20 miles away.

If a car travels at an average of 35 mph, which town or towns could the car visit in 2 hours? Towns A & B & C

10. How long would it take a car to travel 24 miles if it was averaging 45 mph? 32 mins

.uk/shorething

Whiteboard Activity Speed, Distance, Time Science KS3

Distance ? Time Graph Worksheet

Look at the graph and answer the questions.

1. Between which points is the car stationary? 2. Between which points does the car travel fastest? 3. How long does the car stop for in total? 4. How long does it take the car to reach point E?

G

165

150

EF

135

120

105

D

90

75

B

C

60

45

30

15

0

A0

20

40

60

80

100 120 140 160 180 200 220 240 260 280 300

Time in minutes

Distance

.uk/shorething

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