1. What is one of the important roles of tropical rainforests in the earth's environment? A. making the sun shine brighter
B. increasing the earth's magnetic field
C. providing people with something to destroy
D. absorbing excess carbon dioxide in the atmosphere
2. What will be the result if the trees in rainforests are mostly cut down?
A. better air quality
B. increase in wildlife population
C. abnormal warming of the earth
D. abundance in natural habitats of forest organisms
3. How does kaingin or clearing out of forest areas by burning to convert into agricultural
lands disrupt the cycles in the ecosystem?
A. Cleared out forests turn into new breeding grounds.
B. Agricultural lands become natural habitats for wildlife.
C. Plant and animal population in kaingin areas will increase.
D. Organisms in the converted forest areas will lose their natural habitats.
4. Why is there a need to conserve and protect tropical rainforests?
A. Rainforests maintain earth's gravity.
B. The changing of seasons is caused by forests.
C. Forests produce huge amounts of carbon dioxide.
D. Tropical rainforests have important functions in the ecosystem
5. What could be the result if coral reefs are destroyed? ?
A. more beautiful underwater scenery
B. increase in number of predatory fishes
C. loss of habitat of many marine creatures
D. absence of big waves that hit the coastlines
6. Which human activity could cause destruction of the coral reefs?
A. cleanup drive in beachfronts
B. use of sodium cyanide in fishing
C. observing closed season for fishing
D. quarding municipal waters against illegal fishing activities​