Pumps, technology and a flood barrier
Answers are for parents and teachers.
1
Draw a shadoof from the description in the lesson. Label the pole, the bucket and the weight.
Check: a long pole balanced on a post, a bucket on one end and a heavy weight on the other.
2
In the decision game you start at 0 and read the cards +4, −2, +5, −3. Where do you finish?
0 + 4 = 4, 4 − 2 = 2, 2 + 5 = 7, 7 − 3 = 4. You finish on space 4.
3
A school collects 6 pieces of paper, 9 of plastic and 2 of metal. Which is most, and how many pieces in all?
Plastic is most. 6 + 9 + 2 = 17 pieces.
4
Write arrow code for a drone to go from the bottom-left square of a 3 × 3 grid to the top-right square in 4 moves.
Any order with 2 ups and 2 rights works, for example: up, up, right, right.
5
Draw an idea for a flood barrier. Label two materials and give one reason it could work.
Answers differ. Check that the labels name materials and the reason makes sense.