Natural Resources
6th Grade Science · 7 lessons
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Lessons
- 1Groundwater and AquifersGroundwater fills spaces between rocks and soil underground. Aquifers are underground layers of rock that hold and transmit water. Many communities depend on wells that tap into aquifers.Experiment
- 2Soil Layers and HorizonsSoil forms slowly from weathered rock mixed with decomposed organic matter. Different layers (horizons) form with topsoil on top, subsoil below, and bedrock at the bottom.Experiment
- 3Renewable and Nonrenewable ResourcesNatural resources include materials from Earth that people use. Renewable resources (trees, solar energy) can be replenished. Nonrenewable resources (coal, oil) are limited.Lesson
- 4What Causes LandslidesLandslides occur when slopes become unstable due to heavy rain, earthquakes, or human activity. Gravity pulls loose rock and soil downhill, sometimes with devastating speed.Experiment
- 5Renewable and Nonrenewable ResourcesA renewable resource is replaced as fast as we use it — timber if forests are replanted, wind and sunlight always. Coal, oil, gas and metal ores are not; once a deposit is worked out, it is gone on any human timescale.Experiment
- 6Mining Has Costs Above GroundGetting metal out of the ground moves enormous quantities of rock, uses a great deal of water and energy, and leaves waste behind. Recycling aluminium uses about a twentieth of the energy of making it from ore.Experiment
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