population - all the living things that belong to the same species and live in the same area., environment - the living and nonliving things that are around an organism., natural resource - A material that people can use that is found in nature., nonrenewable resource - Natural resources that are used up much faster than they are made., fossil fuel - An energy source that formed millions of years ago from the remains of plants and animals., renewable resource - Resources that can be replaced in nature or that simply never run out., alternative energy source - Resources used to fulfill energy needs that are not fossil fuels., pollution - Any harmful substance that affects Earth’s land, air and water., conservation - To protect resources and avoid wasteful and destructive use., recycle - to properly dispose of used resources so they can be reprocessed into new products, natural disaster - catastrophe caused by natural forces, not man-made forces., Wetland - An ecosystem that is wet during some or all of the year, Groundwater - Precipitation that seeps into the ground and is stored in tiny holes, or pores, in soil and rocks., Aquifer - An underground layer of rock or soil filled with water., Estuary - Area where fresh water feeds into salt water., Fossil Fuel Example 1 - Coal, Oil (Petroleum), Natural Gas, Alternative Energy Source Examples - Moving Water, Solar, Wind, Nuclear, Geothermal, Conservation Example - Reduce/Reuse/Recycle, Natural Resource Example - Wood, wool, water, food, tillage - preparation of land for growing crops, crop rotation - rotating crops on the land to increase productivity, acid rain - rainfall made sufficiently acidic by atmospheric pollution that it causes environmental harm,

Unit 3: Human Interactions with Earth Vocabulary

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