Science 8 · Unit 3: Forces and energy · Cambridge Lower Secondary Science Stage 8

Questions

1. 1. What can be worked out from a distance/time graph?

   • its mass
   • the speed of an object
   • its weight
   • the force on it
   Check

2. 2. What does a horizontal line on a distance/time graph show?

   • The object is moving fast.
   • The object is stationary.
   • The object is speeding up.
   • The object is going backwards.
   Check

3. 3. What does a straight line sloping upwards show?

   • slowing down
   • stationary
   • moving away at a constant speed
   • speeding up
   Check

4. 4. Two lines slope upwards. Which shows the faster object?

   • the flat line
   • the steeper line
   • the less steep line
   • the lower line always
   Check

5. 5. What does a straight line sloping downwards show (distance from start)?

   • moving away faster
   • moving back towards the start at constant speed
   • stationary
   • going underground
   Check

6. 6. Sofia walks slowly, stops to talk, then walks faster. What does her graph look like?

   • a flat line only
   • a downward slope only
   • a gentle slope, a flat part, then a steeper slope
   • a steep slope, then a gentle slope
   Check

7. 7. A plane flies 3600 km in 4.5 hours. What is its speed?

   • 3604.5 km/h
   • 900 km/h
   • 800 km/h
   • 16 200 km/h
   Check

8. 8. The return flight of 3600 km takes 4.0 hours. What is the speed?

   • 450 km/h
   • 900 km/h
   • 800 km/h
   • 14 400 km/h
   Check

9. 9. The plane flies 4.5 h, waits 1.5 h and returns in 4.0 h. What is the total time?

   • 8.5 hours
   • 10 hours
   • 9 hours
   • 6 hours
   Check

10. 10. The graph shows a plane flying from airport A to airport B and back. What is the plane doing between 4.5 and 6 hours?

    • flying to airport B
    • flying at its fastest speed
    • flying back to airport A
    • waiting at airport B
    Check

11. 11. Marcus cycles to a friend's house, stays, then cycles back at the same speed. What shape is his graph?

    • up, flat, then down with the same steepness
    • down, flat, then up
    • flat the whole time
    • up, then up again
    Check

12. 12. What does the gradient of a distance/time graph tell you?

    • the temperature
    • the mass
    • the force
    • the speed
    Check

13. 13. Which axis shows time on a distance/time graph?

    • the horizontal (x) axis
    • neither axis
    • the vertical (y) axis
    • both axes
    Check

14. 14. An object covers 20 m every 4 s. What is its speed?

    • 0.2 m/s
    • 5 m/s
    • 24 m/s
    • 80 m/s
    Check

15. 15. Look at the graph. Which part of the journey was faster, A to B or B back to A?

    • A to B
    • both the same
    • B back to A
    Check

16. 16. A train travels 2000 m from station P to station R in 200 s. What is its speed?

    • 20 m/s
    • 10 m/s
    • 400 000 m/s
    • 0.1 m/s
    Check

17. 17. The train comes back the 2000 m from R to P in 100 s. Which part of its distance–time graph is steeper?

    • the journey back from R to P
    • both are equally steep
    • the journey from P to R
    • the stop at R
    Check