The environment

Question 1

What is an ecosystem

Answer 1

includes all the living organisms existing together in a particular area .

Question 2

What is biodiversity? how can it be maintained

Answer 2

the range of plants and animals in an environment.

Question 3

What is meant by the term feral

Answer 3

plants and animals that have gone wild

Question 4

describe the carbon-cycle cycle

Answer 4

Plants use carbon dioxide and sunlight to make their own food and grow. The carbon becomes part of the plant. Plants that die and are buried may turn into fossil fuels made of carbon like coal and oil over millions of years. When humans burn fossil fuels, most of the carbon quickly enters the atmosphere as carbon dioxide.

Question 5

What is bioogical contol, give an example

Answer 5

the control of a pest by the introduction of a natural enemy or predator

Question 6

what are pesticides

Answer 6

a substance used for destroying insects or other organisms harmful to cultivated plants or to animals.

Question 7

what is extinction

Answer 7

the process in which groups of organisms die out

Question 8

list three natural diasters

Answer 8

floods, earthqueakes, volcanoes

Question 9

list 3 positive and 3 negative impacts of fires

Answer 9

Positive: 1. fires will open up seeds, 2.encourages regrowth, 3.allows new growtn for food.
Negative: 1. crops and animals will die from sufication, 2. Death occurs, 3. wildlife lost

Question 10

what is transect and how is it used to calculate numbers in a population

Answer 10

a transect is a piece of rope across the ground to mark the amount of plants that are growing within each metre