miss forsythe science the cycles of matter the water cycle the matter (stuff) in your body has been...
TRANSCRIPT
Miss ForsytheScience
The Cycles of Matter
The Water Cycle
• The matter (stuff) in your body has been around for millions of years
• Nature does not always make new matter!
• NATURE RECYCLES!!!!
The Water Cycle
• Water Cycle- The movement of water between the oceans, the land and the atmosphere.
• The same water has been on Earth for millions of years. Nature recycles!
The Water Cycle
• Evaporation- The change of a substance from a liquid to a gas.
• Condensation- The change of substance from a gas to liquid.– Think of a cold can of soda on a hot day!
• Precipitation- Any form of water that falls to the Earth’s surface from the clouds.– EX: rain, snow, sleet – Transpiration: The release of water by the plants into
the atmosphere. (plant sweat)
The Water Cycle
The Water Cycle
WE NEED H20!
• All living things are made from water.
• Water helps transport nutrients and waste within living things.
• Water helps regulate temperature.
• ALL LIVING THINGS NEED WATER!
The Carbon Cycle
• Organic Molecules- Molecules that contain carbon.
• All living things contain carbon. • Carbon is used by all living things and is
recycled in nature through the “Carbon Cycle.”
• Photosynthesis and respiration are the basis for the carbon cycle. (we will discuss this later)
The Carbon Cycle
The Carbon Cycle
The Carbon Cycle
The Carbon Cycle• Decomposition- The breakdown of
substances in to a simpler form.
– Example: dead things are decomposed and their nutrients are returned to the environment.
• Combustion- The burning of a substance.– Example: Burning wood or fossil fuels (gas)
releases carbon dioxide into the
environment.
The Nitrogen Cycle
• Nitrogen is important to living things.
• Organisms need nitrogen to build proteins and is major ingredient in DNA!
• About 78% of the Earth’s atmosphere is nitrogen. (That is the good news)
The Nitrogen Cycle
• Most organisms cannot use nitrogen gas from the atmosphere. ( That is the bad news)
• This is where the Nitrogen Cycle comes in!
• Nitrogen Fixation- Bacteria change (fixing) nitrogen (N2) into a form that can be used by living things. (WAY COOL!)
The Nitrogen Cycle
The Nitrogen Cycle
• Passing it on: Decomposers break down the remains of dead things.– Nitrogen is then released into the soil for use
by plants.