ecology

Question 1

what is a habitat

Answer 1

a place where an organism lives

Question 2

what is a population

Answer 2

all the organisms of a certain species that live in the same habitat

Question 3

what is a community

Answer 3

all the populations of a different species that live in the same habitat

Question 4

what is an ecosystem

Answer 4

the interaction of biotic and abiotic parts of the environment

Question 5

give 3 biotic factors

Answer 5

• competition for food
• development of a new disease
• new preditors

Question 6

give 3 abiotic factors

Answer 6

• ph levels of soil
• temperature
• wind intensity/humidity

Question 7

explain the water cycle

Answer 7

1. the energy from the sun evaporates the water from land and the sea. And the water from leaves (transpiration)
2. this water vapour then rises into the clouds, but as it gets cooler the vapour begins to condense into the clouds
3. this water then falls as precipitation, giving the land and sea fresh water

Question 8

what are the three ways to increase biodiversity

Answer 8

breeding programs
adding field margins
recycle

Question 9

what are the problems with increasing biodiversity

Answer 9

• it is expensive
• things like pesticides and fertilisers are needed in order to grow the food we need

Question 10

explain the process of global warming

Answer 10

the gases in the atmosphere act as an insulating layer, they absorb long wavelengths of radiation which have been emitted into space then re-emitted in all directions (including to earth), this then increases the earths temperature

Question 11

what are the affects of global warming

Answer 11

1. ice caps are melting which means sea-levels are rising
2. storms are becoming more severe
3. change in weather patterns

Question 12

what are the three reasons for deforestation

Answer 12

1. making space for buildings
2. making space to grow crops
3. mining