___________ begins at 690 to 1,000 km from the surface, and extends to roughly 10,000 km.
Correct answer: C. Exosphere
- A. Troposphere
- B. Mesosphere
- C. Exosphere
- D. Stratosphere
Explanation
The exosphere is the outermost atmospheric layer, beginning roughly 690 to 1,000 km above Earth and extending thousands of kilometres into space. The troposphere, stratosphere, and mesosphere are much lower layers.
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Environmental science covers ecosystems, food chains and webs, energy flow, biogeochemical cycles, biodiversity, natural resources and population effects. Atmospheric study includes the layers and composition of air, weather and climate, greenhouse gases, global warming, ozone depletion, acid rain and pollution, with climate change distinguished from ordinary weather variation.
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