intro to carbon/oxygen cycle
TRANSCRIPT
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Launch
• What three elements are the building blocks of life?
• How does oxygen play a role in your daily life? How might oxygen be changed in the ecosystem?
• What is the law of conservation of mass?
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1. Julio and Karina were driving up a mountain when they noticed several changes. At the lowest elevation (sea level), they saw green vegetation, many birds, and small mammals. At the highest elevation, they saw bare rock, very little vegetation, and few birds. Which biomes did your classmates most likely pass through while driving from the lowest elevation to the highest elevation of this mountain?
A. Grassland tundra coniferous forestB. Coniferous forest tundra temperate deciduous forestC. Tundra temperate deciduous forest coniferous forestD. Temperate deciduous forest coniferous forest tundra
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2. Many more species of plants and animals live in a tropical forest than live in a savanna. What is the most likely reason for the difference between the tropical forest and the savanna?
A. The savanna contains less water.B. The savanna has less available sunlight.C. The savanna contains soil with sand.D. The savanna has more carbon dioxide in the
atmosphere.
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3. Compared to the trees in coniferous forests, what characteristic do the leaves of deciduous forests have?
A. They lose less water during the summer months.B. They fall off during winter months.C. They absorb less sunlight during the summer
months.D. They stay green year round.
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4. A biome that is marked by low lying shrubs, poor soils and with a climate that is dry in the summer and wet in the winter is known as:
A. Deciduous ForestB. TundraC. Coniferous ForestD. Chaparral
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5. Of the following three biomes, rank them in order from most to least in order of yearly rainfall: desert, rainforest, coniferous forest.
A. Rain Forest, Coniferous Forest, DesertB.Desert, Coniferous Forest, Rain ForestC.Desert, Rain Forest, Coniferous ForestD. Coniferous Forest, Desert, Rain Forest
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Oxygen Cycle
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Oxygen• Commonly referred to as
O2
• 3rd most common molecule in universe
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Photosynthesis• The process by which
plants take in Carbon Dioxide (CO2) and produce sugar and oxygen
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Cellular Respiration• The process by which
organisms take in Oxygen and Glucose and produce water and CO2
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These two processes, Photosynthesis and Carbon Dioxide, depend on each other.