Flashcards

Energy and the cycles of life

Hamza Ahmed English 20 cards

Cards in this deck (20)

1Energy and the Cycles of LifeHamza Ahmed Year 8
2What is the biosphere?The world-wide ecological system which includes all living beings and there surroundings
3What is the water cycle?Water evaporates from lakes etc, and rises to the atmosphere. It then condenses or cools and becomes clouds. When there's too much water in the clouds it precipitates and rains.
4What are the states of water?
5Why does ice float?It is approximately
9% less dense than liquid water.
6What would happen if ice sinks?It would cause the ocean to freeze and eliminate all life on earth
7Why doesn't water heat up easily?It needs a lot of heat energy to heat it because it can hold a lot of energy.
8Why does hot steam burn more than boiling water?It has a large amount of energy when it changes form gas to liquid.
9Where does the energy needed for the water cycle come from?The sun
10What is the carbon cycle?Circulation of carbon in biosphere
11Why is CO2 important?Plants use it to make sugars and animals and humans get energy from plants
12Why is the the carbon cycle important?It's the key mechanism used to change solar energy to chemical energy so living organisms can use.
13What are decomposing organisms?Organisms that break down dead organisms and return the energy to the soil.
14Give some examples'Funguy' and bacteria, mushrooms
15What are fossil fuels?Natural fuels such as coal or gas, formed in long periods from the remains of living organisms.
16How much nitrogen is in the atmosphere?78% of Earth's atmosphere
17What is fixation?Process of making nitrogen available for living things
18What are the 3 ways nitrogen is fixed?Lightning, biologically and industrially
19What is the phosphorous cycle?The cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.
20What is weathering?Breaking away or eroding parts of the environment around us