4 Air and WaterA Natural Resource is a material found on Earth that can be used by people.Two types of Natural Resources:Nonrenewable Resource are resources that cannot be replaced.Examples: oil, gas, and coalRenewable Resource are resources that can be replaced or renew itself.Examples: air and water
5 Plants and AnimalsEarth’s plants and animals are important renewable resources.AnimalsGet their energy from plants and other animals.People use animals in a number of ways (food and clothing).PlantsClean and renew the air.People harvest trees to use the wood.Some plants are used in medicine.
6 Water as a ResourceThe water we use comes from the fresh water supply.The Water Cycle renews our supply of fresh water.Water evaporates.Water vapor condenses forming clouds.Water falls back to the Earth in the form of precipitation.
7 Soil and Nutrients Soil is an important resource. Plants need the nutrients in soil to grow.Nutrients need to be replaced in order for soil to be used again.Farmers use crops and fertilizers to help restore lost nutrients.
9 Fossil FuelsA Fossil Fuel is a fuel formed from the remains of once living things.Coal- the most common fossil fuel- Uses: to produce electricity and heatingOil- Uses: fuel for cars, plastics, medicines, and fabricsNatural Gas- Uses: heat for homes, run some appliances
10 Fossil Fuel Benefits (Pros) Fairly easy to remove from the groundEasily transportedCheaper than other forms of energyFossil Fuel Drawbacks (Cons)All fossil fuels are nonrenewableOil and Natural Gas may run out in 100 yearsCause Pollution (adds harmful materials to the air, water, and soil)
11 Other possible energy sources include solar power (sun), hydroelectric power (water), and wind power which are all renewable resources.
12 Layers of Soil A Horizon (Topsoil) B Horizon C Horizon D Horizon a. The upper layer of soil that contains minerals and humus (decayed plant and animal matter)B Horizona. This layer contains minerals but very little humusC Horizona. This layer is mostly broken up, weather rocksD Horizona. This layer is bedrock,the solid rock below the lowest layer of soil
13 Types of SoilSoil is classified by the type of rock bits they contain.Three main types are sand, silt, and clay.Different plants, trees, and crops grow in different soil types.
14 Rocks and MineralsRocks are solid materials that are made up of one or more minerals.a. Examples: granite and marbleMinerals are natural solids found in the Earth’s crust.a. Examples: graphite (lead), calcite (chalk), and halite (salt)Ores are rocks that are mined for the mineral it contains.a. Examples: iron, copper gold, and tin.
16 Tons of Garbage Millions of tons of trash is thrown away each year. Trash that is thrown away is buried or burned.Trash is buried in a landfill or dumpTrash is burned in an incineratorSome of the materials that are thrown away are made with pollutantsa. Pollutants are materials that cause pollution.
17 Good and Bad PracticesConservation is the wise use of natural resources.There are laws in the U.S. that require companies and communities to control pollution.a. These laws help protect natural resources.
18 Reduce, Reuse, RecycleReduce, Reuse, and Recycle are ways to conserve natural resources.Another good practice is to use products that are biodegradable (breaks down easily).
19 Products made from recycled materials Recycling is the process of breaking down materials into a different form that can be used again.a. Materials that can be recycled are newspaper, aluminum cans, glass, and some plastics.Products made from recycled materialsRecycled Paper: new newspaper, packaging, and even furniture.Recycled Plastic: fabric for clothing, CD cases, playground equipment, and ballpoint pens.