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Interview… Interview 2 of your peers using the following
question:
How could the local drinking water become polluted or contaminated?
Human or Animal wastePesticidesToxic run-off from manufacturing
plants
The Water Cycle Where can water be found? Lakes, rivers, streams, oceans, vapor, in
the ground.
When you open a new bottle of water do you think it is brand new water?
The movement of water between these reservoirs is known as the water cycle.
The Water Cycle Made up of 3 Processes…
1. Evaporation- adds water as vapor to the atmosphere How does this happen?
The Water Cycle 2. Transpiration- the process when water
evaporates from the leaves of plants in terrestrial ecosystems.
The Water Cycle 3. Precipitation- the process by which
water leaves the atmosphere and abiotic factors play a role.
Time for Questions… What is the main power source behind
the water cycle?
What does the water cycle have to do with the weather?
Carbon Cycle Photosynthesis- plants and other
autotrophs use carbon dioxide, solar energy, and water to make carbohydrates.
Carbon Cycle Cellular Respiration- processes that
takes place in the cells and tissues during which energy is released and carbon dioxide is produced.
Organisms use the oxygen released to help breakdown carbohydrates.
Carbon Cycle Decomposition- decomposers release
carbon dioxide back into the atmosphere when they break down organic material.
Nitrogen Cycle The way nitrogen flows through the ecosystem. Where can nitrogen be found? Nitrogen Gas- 78% of the atmosphere Plants can only use nitrogen in the form of nitrate. Nitrogen Fixation- process of converting nitrogen
gas into nitrate. Nitrogen Fixing Bacteria- convert nitrogen gas into
usable form. Live in the soil Inside swellings on the roots of plants: beans, peas Plant provide Carbohydrates and the bacteria
provide the usable nitrogen. Example: Farmers plant legumes
Nitrogen Cycle Decomposers- break down dead plants
and animals that contain nitrogen. Dung and Urine also contain nitrogen
that are decomposed, releasing Carbon Dioxide back into the atmosphere.
Time for Questions… Identify the role of bacteria in the
Nitrogen Cycle and tell their role.
What are the mutual benefits in the association between nitrogen-fixing bacteria and the plants they inhabit.
Water Trivia Game Only 3% of Earth’s water is fresh water. 97% of the water on Earth is salt
water. The water found at the Earth’s surface in lakes, rivers, streams, ponds, and
swamps makes up only 0.3% of the world’s fresh water. 68.7% of the fresh water on Earth is trapped in glaciers. 30% of fresh water is in the ground. More than 25% of bottled water comes from a municipal water supply, the
same place that tap water comes from. A ten meter rise in sea levels due to melting glaciers would flood 25% of the
population of the United States. There is more fresh water in the atmosphere than in all of the rivers on the
planet combined. If all of the water vapor in the Earth’s atmosphere fell at once, distributed
evenly, it would only cover the earth with about an inch of water. Approximately 400 billion gallons of water are used in the United States per
day. It takes six and a half years for the average American residence to use the
amount of water required to fill an Olympic-sized swimming pool (660,000 gallons).
American residents use about 100 gallons of water per day. Americans use more water each day by flushing the toilet than they do by
showering or any other activity.[ii]