Chapter 30 Review

Video Review

Key Concept Summary

TA Summary

True/False

Sea level is the lowest elevation to which all streams cut.

True False

In general, groundwater moves very slowly.

True False

Rocks with high permeability allow water to flow easily through them.

True False

If a rock has high porosity, the same rock will have high permeability.

True False

Analysis

The picture was taken near Mona, Utah. Which of the following caused the features in the image to the right? A photo of an alluvial fan.

stream alpine glacier groundwater wind continental glacier

In general, which of the following sources is the most important for fresh water for humans?

Glaciers Groundwater Desalinated ocean water Streams

The most important erosional agent of the hydrological system is which of the following?

Wind Running water Groundwater Glaciers Oceans

Which of the following correctly describes how energy from the sun drives the hydrologic cycle on Earth?

The energy from the sun is transferred uniformly to the Earth’s atmosphere by convection. As the air heats up, it evaporates the water in the oceans. The energy from the sun is absorbed primarily by the land. Convection caused by the absorbed heat evaporates water near the coast. The energy from the sun is transferred by radiation through the atmosphere to the oceans. This radiation is strongest near the equator, and most evaporation occurs there. Energy from the sun is absorbed by glaciers, melting them. This heat is transferred into kinetic energy which in turn evaporates the water from the lakes and streams. Energy from the sun is reflected off of the poles causing convection cells. The winds associated with this convection bring water from the poles towards the equator where temperatures are warmer.

Moraines are associated with which of the following?

Ocean currents Wind Streams Glaciers

The picture below shows a valley in Oregon. Which of the following caused the features in the image? A photo of u-shaped valley.

continental glaciers groundwater streams alpine glaciers wind

Which of the following statements is true concerning streams?

Streams carry more sediment when moving quickly since the stream has more kinetic energy which is used to carry more sediment. Streams carry more sediment when moving slowly since the stream has more kinetic energy which is used to carry more sediment. Streams carry less sediment when moving quickly since the stream has more kinetic energy so the stream has too much energy to carry as much sediment. Streams carry less sediment when moving quickly since the stream since the energy is used to make the water move, so the stream doesn't have enough energy to carry as much sediment.

Streams cut deep valleys as they travel through mountains, but the same streams deposit large amounts of material to form deltas when they reach the ocean. Why?

The material that makes up mountains is softer and easier to erode than the material found near the beaches. Salt water is more dense than fresh water, so it is less able to support the weight of the silt and sand. So, as the stream mixes with ocean water, it drops the material it carried down from the mountains. Ocean water already has the maximum amount of minerals dissolved in it. Any new material carried out to the ocean precipitates out as sand. Streams’ role in the hydrologic cycle is to remove material, while oceans deposit material. When streams are traveling down steep slopes the water picks up material because it has more kinetic energy. When the water reaches the ocean, it slows down and drops that material.

Chapter 30 Review

Video Review

Key Concept Summary

TA Summary

True/False

Analysis

Free Response