Sec 1 Chap 6 Quiz

How do tropical forests generate oxygen?

• through photosynthesis

• through infiltration

• through surface runotff

What is photosynthesis?

• Process in which they absorb carbon dioxide, water and sunlight to produce food for own survival and growth

• Process in which they absorb oxygen, water and sunlight to produce food for own survival and growth

• Process in which they absorb carbon dioxide, seawater and sunlight to produce food for own survival and growth

• Process in which they absorb, carbon dioxide, water and moonlight to produce food for own survival and growth

What is carbon storage?

• give out carbon dioxide to the atmosphere during photosynthesis

• absorb oxygen from the atmosphere during photosynthesis

• absorb carbon dioxide from the atmosphere during photosynthesis

Which of the following are correct in showing the steps of how trees contribute to carbon storage?

• Carbon dioxide is absorbed through photosynthesis

• Oxygen is absorbed through photosynthesis

• Fresh leaves fall to the ground and give out carbon

• Absorbed carbon dioxide is stored in solid form in the plants, in their leaves, branches, stems and roots

• Dead leaves and branches that fall to the ground addd carbon to the soil

How much carbon is stored in mangrove forest?

• 0-20 kg per sq km a year

• 20-40 kg per sq km a year

• 40-60kg per sq km a year

• 60-80kg per sq km a year

Why are mangroves effective at storing carbon?

Why are tropical forests rich in biodiversity?

Why will there be more soil erosion if there are no tropical rainforests?

• falling raindrops hit the soil with considerable force, causing soil particles to become detached

• there is little infiltration and percolation of rainwater into the soil,

  leading to high surface runoff

• loosened particles are easily washed away by flowing water, resulting in severe erosion

What will happen to coastal areas if there are no mangroves?

• Loose sediments are easily washed away by waves. currents and tides

• Strong waves do not lose much energy as they travel towards the coast.

• Significant coastal erosion occurs when waves hit the coast with force

How do the Moken people in Southern Myanmar and Thailand use the tropical forest as a habitat?

• hunt for fish in the mangroves as source of food

• trade fish for rice and other necessities

• mangroves provide them with construction material to build houseboats.

• plant rice in the mangroves

• catch birds to eat as food