Reacting quickly
Answers are for parents and teachers.
1
Show a family member the stick test or a simple version: they hold a ruler and you catch it. Record the distance and use the chart.
Answers differ. Distance is converted to time with the chart (5 cm 0.10 s … 30 cm 0.25 s).
2
Find the average of 0.17 s, 0.20 s and 0.20 s.
0.57 ÷ 3 = 0.19 s.
3
Draw the three steps jerboa-style: ears, brain, legs. Use arrows.
The arrows go from ears to brain to leg muscles.
4
Name one reflex you have and when it happens.
Answers differ, for example blinking when dust blows near my eye.
5
Write a claim, evidence and reasoning about the jerboa’s big ears.
Claim: big ears help the jerboa survive. Evidence: it hears an owl and escapes. Reasoning: hearing early gives it time to leap away.