Tables, charts, and graphs · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.
En anglais

Tables, charts, and graphs

Science · Scientific Inquiry · ages 12-13
Name ______________________   Date ____________

  1. A straight fitted line is already drawn. Which pair should you choose to calculate its gradient?

    • Two well-separated points on the fitted line
    • Two nearby observations away from the fitted line
    • The lowest and highest observations anywhere
    • The origin and any observation, whatever the line

  2. A graph has Weight / N horizontally and Spring length / cm vertically. A table row records 3 N and 14 cm. What is the point's x-coordinate?

    Answer: ______________

  3. An upward scatter trend between plant height and leaf number proves that greater height causes more leaves.

    Circle one:   True   False

  4. A time axis has equally spaced ticks at 0, 5, 10 and 15 seconds. What time is halfway between the 5-second and 10-second ticks?

    Answer: ______________

  5. A student records a toy car's total distance travelled every second and wants to connect the readings in time order. Which graph fits?

    • Line graph
    • Bar chart
    • Scatter graph

  6. A student measures length and width for ten different leaves. Which graph best shows whether these measurements are related?

    • A line graph joining leaves in order
    • A bar chart of separate leaf totals
    • A scatter graph of paired values

  7. A cooling graph has Time / min horizontally and Temperature / °C vertically. Its straight fitted line passes through (1, 28) and (5, 20). What is its gradient in °C/min?

    Answer: ______________

  8. A line of best fit passes through the points (2, 4) and (6, 12). What is the gradient?

    Answer: ______________

  9. Measurements cover temperatures from 10 °C to 30 °C. A fitted line predicts a sensor reading at 20 °C and at 45 °C. Neither prediction has been checked. Which conclusion is justified?

    • The 45 °C prediction has stronger support because it extends the line further.
    • Both predictions are exact because they come from the same fitted line.
    • The 20 °C prediction has better support from the measured range.

  10. A line of best fit passes through (0, 3) and (5, 18). What is its gradient?

    Answer: ______________

LightMySky · lightmysky.comW1-mt_YHsUhi4Prc-s1

Answer key

For grown-ups. Fold this page away before handing over the rest.

Tables, charts, and graphs W1-mt_YHsUhi4Prc-s1

  1. Two well-separated points on the fitted line · Both points must lie on the fitted line. Choosing them well apart reduces the effect of coordinate-reading uncertainty.
  2. 3 · The horizontal quantity supplies x. The pair is (3, 14), so x = 3.
  3. False · The graph shows an association, not proof of a cause. Another factor could affect both measurements.
  4. 7.5 · Half the 5-second interval is 2.5 seconds. Adding this to 5 gives 7.5 seconds.
  5. Line graph · A line graph connects distance readings in time order to show change.
  6. A scatter graph of paired values · Each leaf supplies one length-width pair. A scatter graph shows the relationship without joining separate leaves.
  7. -2 · Gradient = (20 - 28) / (5 - 1) = -8 / 4 = -2 °C/min.
  8. 2 · Gradient = change in y / change in x = (12 - 4) / (6 - 2) = 8 / 4 = 2.
  9. The 20 °C prediction has better support from the measured range. · 20 °C lies within the measured range; 45 °C lies outside it. The observed relationship gives better support to the prediction at 20 °C, but does not guarantee it.
  10. 3 · Gradient = (18 - 3) / (5 - 0) = 15 / 5 = 3.
Worksheet · LightMySky