A Mark each statement as either true (T) or false (F) according to the reading. 1. ____ Some scientists estimate that half of all species will be extinct in the
next century.
2. ____ The Earth is facing its third mass extinction in history.
3. ____ A higher percentage of bird species face extinction than coniferous trees.
4. ____ Forty percent of all mammals are threatened with extinction.
B Choose the best answer. 1. How many ways does the reading passage indicate that humans harm the
environment?
a.
One
b.
Two
c.
Three
d.
Four
2. Which is NOT an outcome of mass extinction of life on earth?
a. Rising of sea levels
b.
Food
shortages
c. Lack of fresh water
d.
Natural
disasters
3. Which kind of animal is the Nile perch?
a.
amphibian
b.
fish
c.
bird
d.
mammal
C For the next two questions, look for the answers in the passage and write them on the lines provided. 1. Why are rainforests important to the planet?
______________________________________________________
______________________________________________________
2. How can mass extinction of living species lead to the extinction of humans?
______________________________________________________
______________________________________________________
V
ocabulary Extension
S
ummary
57
Here are six words that are related to the topic but are not in the reading. Fill in each blank with the best word from the list. Use each word only once. brink ecosystem magnitude deforestation conserve wildlife
