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Science 4th Nine Weeks Study Guide 6th Grade
Terms in this set (48)
What is the process by which natural forces move weathered rock and soil from one place to another?
Mass movement is caused by?
Deltas are built by what?
Landslides, mud-flows, slump, and creep are all examples of what?
Wind carrying sand grains deposits the sand when the wind does what?
Slows down or it hits an obstacle
Most beach sand comes from where?
Rivers that carry eroded sediment to the oceans
A stream or river that runs into another stream or river is called a what?
The energy that produces ocean waves comes from where?
What kind of weathering causes the mineral composition of rocks to change?
A rock containing iron becomes soft and crumbly and reddish-brown in color is chemically weathered by what?
The most important factors in determining the rate of weathering are what?
Type of rock and climate
A hot and wet climate causes weathering to take place....?
Soil is valuable resource because it is what?
Important to all living things
Soil that is rich in hummus has high what?
The process that lays down sediment down a slop is called what?
What is the very slow movement of sediment down a slope called?
The stronger the wind, the _____ the particles it erodes....
The loose material on Earth's surface that contains weathered rock particles and humus is called what?
What soil conservation technique to restore soil's fertility involves planting legumes?
The amount of runoff in an area depends on what?
Vegetation, rain, and soil type
Volcanic belts from along where?
What is lava called before it reaches earth's surface?
Where did Hawaiian Islands form?
Over a hot spot
What provides the force that causes magma to erupt to the surface?
If a volcano's magma is high silica, the volcano will erupt how?
Explosively or violently
What is the main hazard of a quiet volcanic eruption?
What is meant by a dormant volcano?
It is sleeping or may erupt in the distant futuer
What type of volcano forms from layers of lava that alternate with layers of ash?
What type of volcano forms from ash, cinders, and bombs?
What is a hot spring?
Groundwater heated by magma that collects in a natural pool
Old Faithful is a example of a what?
Where does magma form?
What helps to determine how easily magma flows?
The amount silica in the magma
What does the viscosity of magma depend on?
Silica content and temperature
Groundwater heated by magma is a source of what?
What do you cal a volcano that is erupting?
What type of boundary do volcanoes form along the mid-ocean ridge?
What kind of flow occurs during an explosive eruption?
What happened to the water level during the last ice age?
How do oceans affect the temperatures of nearby land?
Cause it to be less extreme (milder)
How is Earth's ozone layer beneficial?
It blocks out harmful UV rays
How does increased carbon dioxide cause global warming?
Trapping more heat in the atmosphere
What are clues to ancient climates?
Pollen,tree rings, and fossils
What two major factors are used to classify climates?
Temperature and precipitation
What is the average year-after-year conditions of temper, precipitation, winds, and clouds known as?
An important principle scientists follow to determine ancient climates is if an organism today needs certain condition to live, then ______ organisms that lived in the past needed______ conditions.
The farther you live from the ocean, the more likely you climate will be what?
Summers are caused by what?
Longer days and more direct sunlight
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