Some key concepts covered in Unit 9 lesson 1 of Earth Science Semester B include:
1. Earth's atmosphere: the layers of gases that surround the Earth and play a crucial role in maintaining life on our planet.
2. Composition of the atmosphere: the atmosphere is mostly made up of nitrogen (78%) and oxygen (21%), with small amounts of other gases like carbon dioxide and argon.
3. Ozone layer: a region of the stratosphere that contains a high concentration of ozone (O3) molecules, which absorb and block harmful ultraviolet (UV) radiation from the Sun.
4. Greenhouse effect: the process by which certain gases in the atmosphere, such as carbon dioxide and methane, trap heat from the Sun and warm the Earth's surface.
5. Climate change: the long-term alteration of temperature and weather patterns due to changes in the Earth's atmosphere, primarily caused by human activities like burning fossil fuels and deforestation.
6. Global warming: the increase in Earth's average temperature due to the enhanced greenhouse effect, leading to various environmental impacts such as melting ice caps, rising sea levels, and extreme weather events.
These concepts are important for understanding the Earth's atmosphere and the potential consequences of human activities on our planet's climate and environment.
Unit 9 lesson 1 semester b review earth science
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