Chapter 5 & 6 Test Review 7th Grade Science

Scientists Measure Everything! Catastrophic events such as hurricanes, tornadoes, and earthquakes are classified/measured by their impact on ecosystems. Catastrophic Event Measured By Hurricanes Saffir-Simpson Scale Earthquakes Richter Scale Tornadoes Fujita Scale

All About Hurricanes Storm surges take place and push ocean water higher along the coast. Develop over warm waters. Waves move sand and cause flooding. Wind and waves impact coastal areas when they hit shore.

Tornadoes Have Impact Violent, whirling column/funnel of air Can pick up trees and houses Can pick up entire ponds and rain fish back to Earth Can destroy ecosystems

The True Facts About Tornadoes Can be called a twister Classified using the Fujita Scale Can form during hurricanes and thunderstorms Highly destructive Can pick up houses, cars, and other buildings

Everyone loves Erosion Erosion is the movement of sediment or rock from one area to another. The process of erosion can be slowed by trees and other plants absorbing the water through their roots. Agents of erosion: Wind Water Ice Gravity

Weathering--break it on down! Weathering is chemically or physically breaking down rock. Physical weathering: does not cause the composition of rock to change Examples: Sand, water, frost wedging, animals burrowing. Chemical weathering: causes the composition of rock to change Examples: Rusting, algae, and bacteria

Beware of Floods! Floods are rising bodies of water over normally dry land. The most flood-related deaths each year are caused by cars going through moving water.

Did someone say deposition? Laying down sediment in a new location is called deposition. An example of deposition would be sediment being deposited in the same location and a landform called a delta forms.

Water, water, everywhere! Groundwater is water that is found beneath the surface of the Earth. Examples of surface water: oceans, lakes, streams, ponds, rivers Surface water can become groundwater by sinking or soaking into the ground.

What’s a watershed??? A watershed is an area of land that funnels all of its surface water and groundwater into a body of water such as an ocean or river. A water table is the upper limit of ground water. Wetlands are an area of land that is saturated with water for part or all of the year.

YOU impact surface water! Humans can impact surface water by: Using herbicides Using pesticides Using fertilizers

Ecoregions are everywhere! An ecoregion is a large area of land that has a distinct group of plants, animals, and other species. The Texas Panhandle contains rolling plains and high plains. The Trans Pecos region of Texas receives the least amount of rain each year.