Ecosystem

Question 1

What is an ecosystem?

Answer 1

Specific area where living organisms, (biotic components) interact with each other and their nonliving a ( abiotic components) environment .

Question 2

Give different examples of ecosystems

Answer 2

Sky
water
Savannah
rainforest
tropical forest

Question 3

Identify biotic components of an ecosystem

Answer 3

Birds
Penguin
Ants
Plants or flowers
Fish and worms

Question 4

Identify abiotic components in an ecosystem.

Answer 4

Rocks
Sand dirt
Water
Bones of corpses

Question 5

How many characteristics does a organism have to have in order to be classified alive?

Answer 5

7

Question 6

List seven characteristics

Answer 6

Movement
Respiration
Sensitivity
Nutrition
Excretion
Reproduction
Growth

Question 7

Describe the characteristic movement

Answer 7

Action of an organism part of the organism, causing a change in position.

Question 8

Describe the characteristic respiration (4)

Answer 8

Chemical reaction, (taking place in all living cells) that breaks down glucose and releases energy for metabolism.

Question 9

Describe characteristic sensitivity

Answer 9

Ability to detect and respond to changes in the internal and external environment.

Question 10

Describe characteristic nutrition (4)

Answer 10

Taking in materials for energy growth and development.

Question 11

Describe the characteristic excretion

Answer 11

Removal of waste products of metabolism, and substances, in excess to recoverment.

Question 12

Describe the characteristic reproduction

Answer 12

Make more of the same kind of organism.

Question 13

Describe the characteristic growth

Answer 13

Permanent increase in size and dry mass.

Question 14

What is another name for ecosystems?

Answer 14

Biomes

Question 15

Name the different types of biomes found in South Africa (7)

Answer 15

• Savanna
• Succulent Karoo
• Nama Karoo
• Thicket
• Fynbos
• Forest
• Grassland

Question 16

What is a habitat?

Answer 16

Place where organism lives

Question 17

What different habitats exist in ecosystems

• trees
• Ants
• Lion
• ferns
• moss
• jackal
• giraffe

Answer 17

• ground
• ant hill
• savannah
• forest, shady soil
• damp sandy soil
• barrow in the soil
• Savannah

Question 18

What is bioaccumulation?

Answer 18

• toxic substances in the environment, buildup in organisms in a food chain.
• Produces will have less toxic substances than organisms higher up in the food chain.

Question 19

What impact does bioaccumulation have in an ecosystem? (2)

Answer 19

• Organisms can become sick and even die.
• People eating the organisms can also become sick.

Question 20

What are invasive species?

Answer 20

A species that is not native to an (area brought to country by people)

Question 21

Name some invasive species found in Namibia. (2)

Answer 21

Honey mosquito
Water fern

Question 22

How does the introduction of an invasive species in an area affect the rest of ecosystem? (3)

Answer 22

• Invasive species will often outcompete the local organisms for available resources.
• Local organisms will decrease in number.
• Local organisms could become extinct