The process by which water, ice, wind, or gravity moves weathered particles of rock and soil
A lake that stores water of human use
The process of restoring land to a more natural, productive state
When saltwater gets into the freshwater aquifers
A stream or river that flows into a larger river
Human-made gases containing chlorine and fluorine (also called CFCs) that are the main cause of ozone depletion
Layers of soil and what's in each
The litter contains dead leaves and grasses. The topsoil contains rock fragments, decaying plant and animal matter, and plant roots. The subsoilcontains more rock fragments but less animal and plant matter. The bedrock contains the rock that makes up the earth's crust.
% of water that's saltwater
97% of water on Earth is saltwater.
Difference between the unsaturated and saturated layers
The unsaturated layer is the layer of rocks and soil above the water table in which the pores contain air as well as water. The saturated layer is the layer of permeable rock or soil in which the cracks and pores are toatlly filled with water.
Difference between permeable & impermeable and examples of each
Permeable is when there are air spaces that are connected so water can seep through easily. Ex: gravel
Impermeable is when water can not easily pass through the layer. Ex: clay
The importance of bacteria
Bacteria helps break down dead animals and plants to help create a natural fertilizer that helps the new plants to grow.
3 factors that contribute to a red tide
Fertilizer, Pesticides, and animal waste can contribute to the red tide.
3 reasons soil management is important
It takes hundreds of years to form new soil. Soil contains the minerals and nutriends that plants need to grow. Soil also absorbs, stores, and fliters water.
3 reasons why wetlands are important
It provides environments to plants and animals. It helps take the toxic chemicals out of the water. They also help control floods by absorbing extra runoff from heavy rains.
Importance of the ozone layer
The ozone layer helps keeps too much radiation to come through our atmosphere.
Process of eutrophication
When some phosphorus, nitrogen, or animal waste goes into a freshwater pond or lake, the algae starts to form a thick layer which blocks the sun. Without the sunlight, all of the underwater plants will die, causing the oxygen level in the water to drop. This kills the fish and they start building up on the bottom of the pond or lake. The bacteria start to break down the fish, but since they are also living things, they end up using up the remaining oxygen that is still in the water.