Human ecology and comparing ecosystems
Answers are for parents and teachers.
1
A student spends 2400 kcal a day. How many kcal are needed in 3 days?
7200
2
Compare the Arctic and tropical adaptive types on two traits.
In the Arctic heat production is strong and the chest broad; in the tropics sweating is high and limbs are long.
3
20 species were found in a desert and 4 in a crop field. Find the ratio.
5
4
What health risk do pesticides pose and what precautions exist?
They are toxic; wear gloves and a mask when using them, do not eat unwashed vegetables, keep children away.
5
Name two physical and two chemical factors affecting health in a city.
Physical: noise, heat; chemical: exhaust gases, toxic substances in dust.