1. Distinguish between food chain and food web. [3]
2. What is an endangered species? Give two examples of endangered species. [4]
3a. State and explain any two human activities that is a threat to the balance in the ecosystem. [6]
3b. For the human activities you have stated in (3a) above, explain how we can maintain
The balance in the ecosystem. [4]
4. The diagram below shows the Food web of the Forest. Study it carefully and use it to answer the questions that follows:
a. Give an example of a food chain that contains four (4) levels from this food web. [4]
……………………….. …………………………………….. . ……………………………. ……………..
b. How many first consumers (primary consumers) are there in this food web? [2]
c. The green plant on the diagram above is a producer what is a producer? Explain it. [2]
Answers
1.
A food web consists of many food chains.
A food chain only follows just one path as animals find food.
eg: A hawk eats a snake, which has eaten a frog, which has eaten a grasshopper, which has eaten grass.
A food web shows the many different paths plants and animals are connected.
eg: A hawk might also eat a mouse, a squirrel, a frog or some other animal. The snake may eat a beetle, a caterpillar, or some other animal. And so on for all the other animals in the food chain.
A food web is several food chains connected together.
2.
An endangered species is a species (a population) of animals, plants or other organisms that is in danger of becoming extinct. This could happen because there are few of that animal left, its predators have grown in number, or the climate that it lives in is changing, or the places it lives in have been destroyed.
Examples:
1) tiger
2) polar bear
3) Pacific walrus
4) Magellanic penguin
5) mountain gorilla
3a .
Various Human Activities That Affect an Ecosystem
1. Agriculture
2. Plastic production
3. Emission of Carbon Dioxide and other greenhouse gases
4. Destruction of the reefs
5. Production of Black carbon
6. Draining streams/rivers and destruction of critical fresh water aquifer recharge areas
7. Overhunting and overexploitation
8. Genetic modifications
3b.
How humans affect our ecosystem in a good way
Most of the time when you hear pollution being talked about you immediatly think of air pollution because it is the most commonly known form of pollution. Air pollution is caused by cars,factories and different types of gases.That causes the greenhouse effect.
An ecosystem is ... Eco means life.
An ecosystem is a community of plants, animals and smaller organisms that live, feed,reproduce and interact in the same area of environment.
Human impact on the ecosystem is something done by humans and gives the affect at the ecosystem like chopping down forests,and cars burning off greenhouse gases.Humans can effect the ecosystem in a negative way ,by pollution, waste dumping, over hunting of animals,over fishing,industrial gases,energy use and not using biodegradable products.
4 . (a). this answer in the first picture .
(b) this answer in the second picture.
(c) this answer in the third picture.
mate itna bada questions aur itne kam points galat baat hai
and please mark my answer as brainliest.
