Science- Exploring camouflage
LO: Explore camouflage
This week you will need:
- about 2 m of green or brown string or wool cut into 5 cm lengths;
Before you start today’s tasks, hide your short lengths of string or wool in a hedge or in the grass.
Watch this video of the author Isabel Thomas reading her book "Moth: An Evolution Story".
Questions for IMAGE ONE
- Why do you think the ‘speckled, freckled’ wings help the moths to survive?
- Who do you think the ‘hungry eyes’ belong to?
- What do the parents pass on to their children?
Questions for IMAGE TWO
- What has happened here?
- What is the proportion of moths with peppered wings compared with the proportion with charcoal wings?
Questions for IMAGE THREE
- What is the threat to the peppered moths here?
- How do peppered moths survive this threat?
- The moths with which colour wings are more likely to get eaten? Why?
- The moths with which colour wings are more likely to live long enough to breed and have children? Why?
Questions for IMAGE FOUR
What is the threat to the peppered moths here?
How do peppered moths survive against this threat?
The moths with which colour wings are more likely to get eaten? Why?
The moths with which colour of wings are more likely to carry on breeding and have children? Why?
- Cut out a moth shape and decorate it so that it is camouflaged with its background.
- Can you do it so that it is impossible to see?
- What happens if you move it somewhere else?
- What colours and patterns work best in different habitats: woods, grass, pavement, hedgerows?
- Draw a food chain for: blue tit, caterpillar, sparrow hawk, tree
- A blue tit chick can eat as many as 100 caterpillars per day. A blue tit brood can be as large as 10.
- With both mother and father blue tit foraging all day, how many caterpillars do they each need to find every day? (Before they can feed themselves)
- If there are 10 hours of daylight, how many caterpillars do they need to find every hour?
- The brood will typically take 20 days to fledge. How many caterpillars will the parents need to find before the chicks leave the nest?
- Go back to where you hid the green wool. How many can you find in a minute? Would you find enough wooly caterpillars in an hour to feed your chicks?