Ch.3.5

Question 1

Biodiversity brings many ______________ to humans.

Answer 1

Benefits

Question 2

Many kinds of living things have died out completely. We say that they are _______________.
Eg. The ____________ and the _______________.

Answer 2

Extinct, dodo, mammoth

Question 3

Living things may become extinct because of natural causes:
1.
2.
3.
But in the past 50 years, the rate of extinction has been much _____________ than the rate caused by natural events. The ___________ reduction in biodiversity is mainly caused by _______________ ______________.

Answer 3

Diseases, climate change, natural disasters
Faster
Rapid, human activities

Question 4

As human _______________ increases, more land is needed to build ___________, ___________ and ______________.

Answer 4

Population

Houses, roads, farms

Question 5

We also need more resources such as:
~wood for
1.
2.
3.
~large areas of farmland are needed to ____________________________________________________________________.
~large areas of forest are cleared to _____________________________________________________________________.

Answer 5

Making paper, building houses, making furniture
Grow food for an increasing human population
Obtain wood and land for human use

Question 6

As a result to the destruction of habitats, many forests and other habitats have been _______________________->the living things in these habitats _______________ _______________.

Answer 6

Destroyed, cannot survive

Question 7

Overexploitation refers to the use of natural resources (eg. _____________ and __________________) ________________________________________________________.

Answer 7

Animals, plants, faster than they can replenish

Question 8

Humans __________ and ______________ wild animals for ______________, ____________, _____________ and other purposes.

Answer 8

Hunt, kill, food, medicine, clothing

Question 9

Some animals are killed faster than __________________________________. Because of this __________________, many wild animals are _______________ rapidly in number and may soon be ________________.

Answer 9

They can reproduce, overhunting, decreasing, extinct

Question 10

The ____________ of elephants are used for making crafts.
The ____________ of tigers are used to make carpets
The ____________ of tigers are used for Chinese medicine
The ____________ of sharks are used for making soup.
The ____________ of rhinoceroses are used for making medicine
The ____________ of crocodiles are used for making handbags or shoes
The ____________ of bluefin tuna is used for making sushi

Answer 10

Teeth, skin, bones, fins, horns, skin, meat

Question 11

Fish are an ______________ source of food for humans. As the __________________________ increases, so does the demand for fish. _____________________________ let us catch fish in large numbers. Fish are being caught faster than ________________________________. Scientists warn that if _________________ continues, there may be no more __________ fish. Some plants are also _______[p]_______. Eg __________________________ is [p] for making incense and medicine.

Answer 11

Important
Human population
Modern fishing methods
They can reproduce
Overfishing
Edible
Overexploited
Aquilaria sinensis

Question 12

Pollution is another cause of the ______________________________. Human activities produce many different kinds of ______[q]_________:
~_____________ ________
~_____________
~_____________ _______
~_____________ __________________
~_____________
~______ _______ from _______ ______________
—which is harmful to _____________ and other marine living things

These [q] damage ____________ and are harmful to living things. Pollution causes the death of __________________________________ around the world each year.

Answer 12

Reduction in biodiversity
* Exhaust gases
* sewage
* chemical waste
* excess fertilisers
* pesticides
* oil spills from oil tankers
Seabirds
Habitats, millions of animals and plants

Question 13

As a result of human activities, some kinds of living things have become _____[g]______. There are more in danger of becoming [g] —they are called _______________ ____________. Today there are more than _____________ of them.

Answer 13

Extinct, endangered species, 21000

Question 14

List 6 examples of endangered species:
1.
2.
3.
4.
5.
6.

Answer 14

• Black-faced spoonbill
• Bluefin tuna
• Green pitcher plant
• Green turtle
• Romer’s tree frog
• Tiger