Renewable, flow, and non- renewable

 A renewable resource is a resource that can regrow or reproduce as long as it is not overused  We use renewable resources to meet our wants and needs for food, medicine, shelter, and material things such as clothes and furniture.

Soil is an extremely important renewable resource. Without soil, we would not be able to farm, have livestock, or grow trees. All life on this earth would be affected.

 Fish populations reproduce themselves and are considered a renewable resource.  Fish are a valuable source of food for more than 1 billion people  Fish are also used as a source of food for pets and livestock  The demand for fish is increasing around the world as people in many developed countries have begun to replace red meats with fish in their diets.

 Forests are considered a renewable resource because they can regrow  a fully grown tree can be chopped down, used for firewood, processed for lumber, or manufactured into material goods.  Forests are important to local ecosystems  Trees store water that can be released into the atmosphere, keeping moisture in the air, which is an important part of the water cycle.  The roots of trees hold the soil together, stopping erosion, so more trees and other plant life can grow.  Trees absorb carbon dioxide, a major greenhouse gas  Trees provide oxygen, which all life needs to breathe

 Flow resource a resource that must be used up when and where it is found or it is lost  Types of flow resources:  Water  Sunlight  Air  Flow resources also supply us with energy when they are “on the move.” For example, we use the energy created by water when it flows as rivers, ocean currents, and tides.

 A basic need for all living things  The term water footprint describes the amount of fresh water used by individuals, communities, or businesses. It is useful to compare the water footprints of different countries.

 Air is a basic need. Every living thing needs it to survive.  There are 5 layers to the atmosphere  They are called the exosphere, thermosphere, mesosphere, stratosphere, and troposphere.  The layer of atmosphere closest to Earth is the troposphere. It makes up 75 percent of the atmosphere, even though it only extends from Earth’s surface to between 6 to 18 km above Earth. Weather takes place in this thin layer, as does most of life on Earth.  Troposphere the layer of atmosphere closest to Earth

 We need the sun.  The Sun provides us with heat and energy. Without the Sun, nothing could live on Earth. It supplies light and heat, both of which can be transformed into energy.  Plants use the Sun’s energy to make their food  Plants also produce oxygen  Most animals need oxygen, so they depend on plants

 Non-renewable resources are natural resources that take millions of years to form.  Fossil fuels Fossil fuels were formed from ancient plant and animal life. Oil, natural gas, and coal are fossil fuels. Extracting these resources can be difficult  Minerals Minerals are natural solid substances not formed from plant or animal life. They are found in the rocks that make up Earth.

 Fossil fuels are used to produce most of the world’s energy.  Oil and natural gas are refined into other substances. These substances are used to manufacture products, such as plastics, paints, rubber, and cosmetics.  Coal is the most abundant fossil fuel in the world

 Two types:  Metallic Where is it found? usually found in rocks that were molten (made liquid by intense natural heat, such as in volcanoes) and have cooled Examples: aluminum, copper, gold, iron, nickel, zinc  Non-metallic usually found in sedimentary rocks (rocks formed from sediment, which is matter carried by water or wind and deposited on the surface of the land Examples: asbestos, gravel, potash, salt