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Photosynthesis is important to living organisms because it is the number one source of oxygen in the atmosphere. Without photosynthesis, the carbon cycle could not occur, oxygen-requiring life would not survive and plants would die. The importance of photosynthesis in our life is the oxygen it produces.
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The earth has different layers because as it formed, the lighter parts (like continental crust) floated to the surface, and the really heavy parts (like iron and nickel in the core) sank to the middle. It is just like when you mix oil and water: the oil will float to the surface because it is lighter (or less dense) than the water.
The separation of visible light into its different colors is known as dispersion. It was mentioned in the Light and Color unit that each color is characteristic of a distinct wave frequency; and different frequencies of light waves will bend varying amounts upon passage through a prism.
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<em>Two main types of Tundra:</em>
- Arctic tundra is the tundra region which can be found in the northern hemisphere close to the regions of Alaska, Greenland, Siberia.
- Antarctic tundra is the tundra region found near the Antarctic peninsula.
<em>Biotic factors of Tundra:</em>
Biotic factors can be described as the living components of an ecosystem. The biotic components of the tundra include fungi, mosses, shrubs, insects, fish, birds and mammals.
<em>Abiotic factors of Tundra:</em>
Abiotic factors can be described as the non-living components of an ecosystem. The abiotic components of the tundra include temperature, wind, rain, snow, sunlight, soil, rocks and permafrost.
