Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Biology (P2)
Ecosystems and material cycles
| Question | Answer |
|---|---|
| Give the 4 levels in order of organisation of Ecosystems | Individual, Population, Community, Ecosystem |
| What does individual mean? | A single organism |
| What does population mean? | All the organisms of 1 species in a habitat |
| What does community mean? | All the organisms of different species living in a habitiat |
| What does ecosystem mean? | A community of organisms along with all the non-living conditions |
| How can temperature affect community? | Different species live in different habitats |
| How can light affect community? | As trees grow and give more shade, grasses may be replaced by fungi or mosses |
| How can water affect community? | Some species grow better in slightly damp soils, so if too dry or waterlogged this wouldn't work |
| How can pollutants affect community | Some species cannot survive if air pollutants are too high |
| Give 2 biotic factors that affect community. | Competition and Predation |
| Why is interdependence important in a community? | Organisms depend on each other for food and shelter in order to survive and reproduce |
| What is mutualism? | A relationship between 2 organisms where each benefit |
| What are parasites? | They live closely with a host species, take what they need to survive but the host doesn't benefit |
| How do we use quadrats? | Place it on the ground at a random point, count all organisms in the quadrat, repeat these steps multiple times, work out mean number within first sample area, repeat all steps in a second sample area |
| How do we use belt transects? | Mark out a line, collect data along the line using quadrats, repeat multiple times to find the mean |
| What is bad about fish farms? | In open water they can reduce biodiversity |
| What is bad about introducing non-indigenous species? | Reduce biodiversity by competing or killing indigenous |
| What is bad about Eutrophication? | Too much fertiliser can move into rivers and lakes with rain leading to death of species |
| What are 4 benefits of maintaining biodiversity? | New jobs, Ecotourism, Providing future medicines from plants,, protecting human food supply |
| What is good about conservation schemes? | Prevent a species from dying out: giving a natural habit or providing safe space like a zoo or seed banks for endangered plants |
| What is good about reforestation? | Provide food and shelter for many different species |
| How do different materials cycle through the abiotic and biotic components of an ecosystem? | Living things made of elements that are taken from environment, they turn these elements into the complex compounds, elements are recycled waste products and dead organisms are broken down by decomposers and elements are returned to soil and air |
| Describe the carbon cycle. | Green plants use carbon from CO2 to make carbs, fats and proteins. Eating passes the carbon compounds in the plant along to animals in a food chain. Both plant and animal respiration release CO2 into the air. |
| Describe the next steps involved. | When dead plants or animals decompose they're broken down by microorganisms which release CO2 back into the air. Some useful plant and animal products are burned which releases CO2 |
| Describe the water cycle. | Water evaporates, cools and condenses, water falls from clouds and falls back to the sea |
| How can we use desalination to produce potable water from sea water? | Distillation |
Created by:
user-1956972