PRELIMINARY STAGE 2013
Osei Tutu SHS
Yaa Asantewaah SHS
MfantsiMan Girls
ROUND 4 - TRUE OR FALSE
Bird feathers provide insulation for the body.
ANSWER: TRUE
EXPLANATION:
Feathers trap air close to the body, reducing heat loss.
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PRACTICE QUESTIONS
1. QUESTION: Birds are endotherms.
ANSWER: TRUE
EXPLANATION:
They keep a high, steady body temperature.
2. QUESTION: Birds fluff up their feathers in cold weather.
ANSWER: TRUE
EXPLANATION:
This traps a thicker layer of air.
3. QUESTION: Birds cool down by sweating.
ANSWER: FALSE
EXPLANATION:
Birds have no sweat glands; they pant.
4. QUESTION: Some birds cool down by panting.
ANSWER: TRUE
EXPLANATION:
Water evaporates from the airways.
5. QUESTION: Air is a good conductor of heat.
ANSWER: FALSE
EXPLANATION:
Air is a poor conductor, so trapped air insulates.
6. QUESTION: Penguins huddle together to reduce heat loss.
ANSWER: TRUE
EXPLANATION:
Less of each bird's surface is exposed.
7. QUESTION: Mammals use hair for insulation in the same way that birds use feathers.
ANSWER: TRUE
EXPLANATION:
Both trap air.
8. QUESTION: Small birds lose heat more slowly than large birds.
ANSWER: FALSE
EXPLANATION:
Small birds have a larger surface area to volume ratio, so they lose heat faster.
9. QUESTION: Oil from the preen gland helps waterproof feathers.
ANSWER: TRUE
EXPLANATION:
Wet feathers insulate poorly.