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The human body is made of atoms. Air and water are made of atoms, too. Atoms are so small that millions of them would fit on the head of a pin. Atoms are made of even smaller particles. The center of an atom is called the nucleus. The nucleus is made up of particles called protons and neutrons. Electrons spin around the nucleus in shells.
Greenhouse gases in the atmosphere, including water vapour, carbon dioxide, methane, and nitrous oxide, act to make the surface much warmer than this because they absorb and emit heat energy in all directions (including downwards), keeping Earth’s surface and lower atmosphere warm [Figure B1].
25 Μαρ 2021 · On Earth, natural and human-caused processes affect the amount of energy received as well as emitted back to space. This study filters out variations in Earth’s energy budget due to feedback processes, revealing the energy changes caused by aerosols and greenhouse gas emissions.
5 Αυγ 2019 · Scientists know that the warming climate is caused by human activities because: They understand how heat-trapping gases like carbon dioxide work in the atmosphere. They know why those gases are increasing in the atmosphere. They have ruled out other possible explanations.
Light energy from the Sun is transferred into electrical energy (another form of energy) by a solar panel. Heat energy from a hot water bottle is transfers to a bed (another object)....
Where does the energy that makes life possible come from? Humans obtain energy from three classes of fuel molecules: carbohydrates, lipids, and proteins.
After reading this module, students should be able to: explain the concept of a biogeochemical cycle, incorporating the terms “pool” and “flux”. describe the natural cycles of carbon, water, and nitrogen. name some of the important ways human activity disrupts those cycles.
