11 million takeover day
classwork
This will help you find out if your class has been paying attention!
Ask your class to answer some questions. You can write the answers down as people call them out if you want to talk about the answers further. It would be helpful if you know some of the answers, but hopefully your class will come up with a few surprises!You may run out of time so keep an eye on the clock and leave a couple of minutes to give out your homework sheets. If you have raced through and have time left at the end, you can hand out the homework sheets and let the class get to work immediately. Answers will be available the next day, so you can mark the homework then!
Question 1
What animals would need a layer of fat or blubber to help them stay warm?
Your class may come up with some of these...
Polar bear
Penguin - all species have blubber
Seal - all species have blubber
Whale - all species have blubber
Walrus
Dolphins
You'll notice that these animals all enter the water. Animals that live in the Arctic that do not go in the water tend to have thick fur or feathers which keep them warm in air. The polar bear has both.
Question 2
Where around the home might you find insulators, keeping hot things hot or cold things cold? What materials are these insulators made from, and why is it a good idea to insulate the objects?
Your class may come up with some of these...
Oven gloves
- thick cotton with some air - prevents burning hands
Hot water tank
- thick fabric with lots of air - stops heat loss from water and saves energy
Thermos flasks
- shiny metal and a vacuum (no air!) - keeps drinks warm for a long time
Loft insulation
- thick fabric with lots of air - keeps heat in a house.
Clothes
- fabric with air - keeps us warm
Duvets
- fabric and lots of air - keeps us warm
Tea cosy
- fabric and air - keeps teapot warm
Cool bags and lunch boxes
- plastic or polystyrene and air keeps food cool and fresh
Fridge
- plastic and air - keeps heat out from cold fridge and freezer
Oven
- air and glass - keeps heat in a reduces risk of burns
Answer for homework
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| f | p | o | l | a | r | b | e | a | r | a | l | f | a | q |
| m | k | d | b | l | a | t | h | r | o | q | b | l | r | p |
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