natural resources/whaling/ air / forests

Question 1

name 6 natural resources

Answer 1

• water
• air
• forests
• soil
• animals
• marine life

Question 2

what is living things

Answer 2

this includes plants and animals that live on land or water in rivers lakes and the sea animals that live in sea are called marine animals

Question 3

give 5 examples of non living things

Answer 3

• Air
• Coal
• Water
• Minerals
• Oil

Question 4

how can natural resources be valuable to us

Answer 4

• helps us to stay alive -we drink water,breathe oxygen and eat fish from rivers
• use as a source of energy - wood and coal we burn
• for building and manufacturing - iron used to make steel, clay used to make bricks
• create work - manufacturing things as well as in tourism

Question 5

explain whaling (8)

Answer 5

whaling was initially only near coastal waters.(1)
early whaling affected the development of cultures as in Norway and Japan.(1)
the basque were first to catch whales commercially.(1)
they dominated the trade for 5 centuries.(1)
the first modern techniques were firstly large spears called harpoons(1)
then they used guns (1)
whales population fell dramatically (1)

Question 6

who is a basque

Answer 6

a group of people living in Spain/France

Question 7

name and explain 3 main whale products

Answer 7

Blubber- fatty tissue keeping whale warm-melted down to make oil for soap,margarine,cooking fat ,candles,cosmetics
Ambergris-wazy substance used to fix scent in perfume
Meat-very popular in Japan

Question 8

explain what happened to the SA whales

Answer 8

South Africa joined many other countries in 1979 by banning whaling .the feeling with all countries involved were that whaling was cruel and unnecessary
products made from whales can also be made from other resources

Question 9

what does the atmosphere do

Answer 9

the atmosphere is a layer of gases, known as air, that surrounds the Earth and is kept in place by the Earths gravity.
the atmosphere of Earth protects life on Earth by absorbing the harmful ultraviolet rays of the sun . This helps to warm the surface of the earth and also ensures that temp extremes between day and night does not occur

Question 10

name all of the layers and how far up they are

Answer 10

• Exosphere 700 to 10 000 km
• Thermosphere 80 to 700 km
• Mesosphere 50 to 80 km
• stratosphere 12 to 50 km
• Troposphere 0 to 12 km

Question 11

what does the air consist of

Answer 11

78 % Nitrogen 
20% Oxygen
Small amount of Argon 
carbon dioxide 
also contains water vapour on average 1 % at sea level and 0.4% in the entire atmosphere

Question 12

TRUE OR FALSE

all layers of the atmosphere is the same pressure

Answer 12

FALSE

Question 13

is there a definite boundary between the atmosphere and outer space

Answer 13

NO

Question 14

why do mountain climbers need oxygen masks when they climb everest

Answer 14

the higher the altitude the thinner the air becomes and the harder it becomes to breathe

Question 15

explain the use and abuse of forests

Answer 15

the destruction of forests have become a major problem .this is revered to DEFORESTATION. Every year 200 000 km2 of tropical rainforests are being destroyed. if this go’s on there will be no tropical rainforests by 2020

Question 16

explain why are forests being destroyed

Answer 16

WOOD
the forests produce the best timber. there is an annual increase of demand for this timber. the tropical countries have earned much needed foreign exchange by selling wood

LAND
Forests have also been destroyed to make land available for agriculture and industry. The growing world population exercises pressure through the increased need for food and all possible areas are utilised for this. The fertility of the the ground in these forests is actually very low and their agricultural production is minimal.

MINNING
deposits of iron ore,gold,silver,nickel,copper is exploited here.this leads to destruction forests. it results i pollution that causes acid rain

INFRASTRUCTURE
the building of roads and railway lines and urbanisation has also led to the destruction of forests. The building of dams has led to flooding that has further destruction of forests. Exhausts fumes from cars has also helped with creating acid rain

Question 17

explain the results of continuing deforestation

Answer 17

shortage of oxygen

forests produce large amount of oxygen. the lungs of earth

reduction in rainfall

forests produce moisture

increased temp on earth

fewer trees in world the levels of co2 . pollution increase

increase of soil erosion

without binding effect of trees and root erosion increases. The agriculture potential decrease. Topsoil settles in dams and the silt fills them

homelessness and poverty

the inhabitants of these forests use the trees, fruits and animals from the forests to survive. They live directly from and in the forests. If all the forests vanish, they will have no recourse

shortage of medicines and healing resources

Medicine developed from plants. 10% of all medicines used in SA hospitals come from here. When forests destroyed stock of medicines will come to end

Question 18

what does conserve mean

Answer 18

to protects from harm or loss

Question 19

what does extinct mean

Answer 19

if a plant or animal species has died out and the effect on biodiversity on earth

Question 20

what does conservation mean

Answer 20

Management of natural recourses and to protect it from humans