1. Energy pyramid: Pyramid of energy states the relationship between the producers and the consumers in an ecosystem in terms of energy flow. It is always upright because energy is lost as heat at each step. 2. Biomass: Organic matter which is derived from living organisms is called biomass. 3. True: Water cycle is the simplest one because most of the water remains chemically unchanged as it moves in the ecosystem. 4. True. Acid rains are primarily caused by sulfur dioxide and nitrogen oxides. Hence overloading of nitrogen and sulfur cycles causes acid rains. When combined with water vapor in the atmosphere nitrogen oxide and sulfur oxide are converted to nitric acid and sulfuric acid respectively causing acid rains. 5. Global warming. Human activities, primarily the burning of fossil fuels and clearing of forests, have intensified the natural greenhouse effect, causing global warming 6. The Green house effect: Greenhouse gases keep the Earth warm through a process called the greenhouse effect. If it were not for greenhouse gases trapping heat in the atmosphere, the Earth would be a very cold place. 7. Carbon dioxide, water vapor, methane, nitrous oxide , are greenhouse gases.The most significant greenhouse gases are water vapor, carbon dioxide, methane and nitrous oxide. While oxygen is the second most abundant gas in our atmosphere, O2 does not absorb thermal infrared radiation. 8. True.Ecological overshoot occurs when human demand exceeds the regenerative capacity of a natural ecosystem. Global overshoot occurs when humanity demands more than what the biosphere can renew 9. True. Conservation biology is the management of nature and of Earth\'s biodiversity. Solution 1. Energy pyramid: Pyramid of energy states the relationship between the producers and the consumers in an ecosystem in terms of energy flow. It is always upright because energy is lost as heat at each step. 2. Biomass: Organic matter which is derived from living organisms is called biomass. 3. True: Water cycle is the simplest one because most of the water remains chemically unchanged as it moves in the ecosystem. 4. True. Acid rains are primarily caused by sulfur dioxide and nitrogen oxides. Hence overloading of nitrogen and sulfur cycles causes acid rains. When combined with water vapor in the atmosphere nitrogen oxide and sulfur oxide are converted to nitric acid and sulfuric acid respectively causing acid rains. 5. Global warming. Human activities, primarily the burning of fossil fuels and clearing of forests, have intensified the natural greenhouse effect, causing global warming 6. The Green house effect: Greenhouse gases keep the Earth warm through a process called the greenhouse effect. If it were not for greenhouse gases trapping heat in the atmosphere, the Earth would be a very cold place. 7. Carbon dioxide, water vapor, methane, nitrous oxide , are greenhouse gases.The most significant greenhouse gases are water vapor, carbon dioxide, methane and nitrous oxide. While.

1. 1. Energy pyramid: Pyramid of energy states the relationship between the producers and the
consumers in an ecosystem in terms of energy flow. It is always upright because energy is lost as
heat at each step.
2. Biomass: Organic matter which is derived from living organisms is called biomass.
3. True: Water cycle is the simplest one because most of the water remains chemically
unchanged as it moves in the ecosystem.
4. True. Acid rains are primarily caused by sulfur dioxide and nitrogen oxides. Hence
overloading of nitrogen and sulfur cycles causes acid rains. When combined with water vapor in
the atmosphere nitrogen oxide and sulfur oxide are converted to nitric acid and sulfuric acid
respectively causing acid rains.
5. Global warming. Human activities, primarily the burning of fossil fuels and clearing of forests,
have intensified the natural greenhouse effect, causing global warming
6. The Green house effect: Greenhouse gases keep the Earth warm through a process called the
greenhouse effect. If it were not for greenhouse gases trapping heat in the atmosphere, the Earth
would be a very cold place.
7. Carbon dioxide, water vapor, methane, nitrous oxide , are greenhouse gases.The most
significant greenhouse gases are water vapor, carbon dioxide, methane and nitrous oxide. While
oxygen is the second most abundant gas in our atmosphere, O2 does not absorb thermal infrared
radiation.
8. True.Ecological overshoot occurs when human demand exceeds the regenerative capacity of a
natural ecosystem. Global overshoot occurs when humanity demands more than what the
biosphere can renew
9. True. Conservation biology is the management of nature and of Earth's biodiversity.
Solution
1. Energy pyramid: Pyramid of energy states the relationship between the producers and the
consumers in an ecosystem in terms of energy flow. It is always upright because energy is lost as
heat at each step.
2. Biomass: Organic matter which is derived from living organisms is called biomass.
3. True: Water cycle is the simplest one because most of the water remains chemically
unchanged as it moves in the ecosystem.
4. True. Acid rains are primarily caused by sulfur dioxide and nitrogen oxides. Hence
overloading of nitrogen and sulfur cycles causes acid rains. When combined with water vapor in
the atmosphere nitrogen oxide and sulfur oxide are converted to nitric acid and sulfuric acid

2. respectively causing acid rains.
5. Global warming. Human activities, primarily the burning of fossil fuels and clearing of forests,
have intensified the natural greenhouse effect, causing global warming
6. The Green house effect: Greenhouse gases keep the Earth warm through a process called the
greenhouse effect. If it were not for greenhouse gases trapping heat in the atmosphere, the Earth
would be a very cold place.
7. Carbon dioxide, water vapor, methane, nitrous oxide , are greenhouse gases.The most
significant greenhouse gases are water vapor, carbon dioxide, methane and nitrous oxide. While
oxygen is the second most abundant gas in our atmosphere, O2 does not absorb thermal infrared
radiation.
8. True.Ecological overshoot occurs when human demand exceeds the regenerative capacity of a
natural ecosystem. Global overshoot occurs when humanity demands more than what the
biosphere can renew
9. True. Conservation biology is the management of nature and of Earth's biodiversity.