Cycles of Matter Life Science (the best class ever)
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Transcript of Cycles of Matter Life Science (the best class ever)
Cycles of Matter
Life Science(the best class ever)
What is a cycle?
Examples: BicycleMotorcycle
Where does matter come from?
The same matter has been around since Earth began.
Matter gets recycled
Water Cycle
Different phases of waterSolid iceLiquid waterGas steam (water vapor)
Water Cycle
Step 1Evaporation
Liquid water changes into steam (water vapor) Caused by heat Example: when you boil water, steam rises When the steam rises (goes up) it mixes with
colder air
Water Cycle
Step 2Condensation
Steam (gas) turns back into drops of water (liquid) When many drops group together in the sky, they
form clouds. Examples: water on the mirror after a shower, dew,
water on car windows in the morning
Water Cycle
Step 3Precipitation
Large drops of water fall as rain (or snow in winter) Step 4
Transpiration Water moves through living things
Water Cycle
GroundwaterWater that stays underground
Lakes, rivers, streams Runoff
Water that moves across the surface of the land
InfiltrationWater soaks (filters) into the ground
Nitrogen Cycle
Organisms need nitrogen to make proteins (muscles, hair, skin)
Plants fix nitrogen so we can use it.Special bacteria on plant roots fix nitrogen. It is called nitrogen fixing bacteria.
Plants use the nitrogen that we fix.
Nitrogen Cycle
Herbivores eat producers (plants). Omnivores and carnivores eat herbivores. Carnivores eat omnivores and carnivores. Animals and plants have nitrogen in them
from the food they have eaten. Animals and plants eventually die.
Nitrogen Cycle
The nitrogen from animals and plants goes back to the soil (dirt, ground) when something dies.
Decomposers break down the dead organism.
There is new nitrogen in the soil for plants to fix.
Carbon Cycle
Organisms give and take carbon and oxygen from air and water.Usually as oxygen gas (oxygen in water for
fish, oxygen in air for us to breathe) orAs carbon dioxide gas
Pop bubbles (makes you burp)
Carbon Cycle
Carbon Cycle = movement of carbon through the ecosystem
2 main processesPhotosynthesisRespiration
Carbon Cycle
PhotosynthesisProducers, plantsH2O + CO2 + energy C6H12O6 + O2
Water + carbon dioxide + sun glucose (food) + oxygen
Carbon dioxide CO2 in, oxygen O2 out
Carbon Cycle
RespirationConsumers, animalsC6H12O6 + O2 H2O + CO2 + energyglucose (food) + oxygen Water + carbon dioxide + energy
Oxygen O2 in, carbon dioxide CO2 out
Breathe – on – your – fingers demo