A geological fault line that extends along roughly 800 miles of California coast and is the source of many earthquakes is ?
What is the San Andreas fault?
100
A term that refers to the structure or movement of Earth's crust,which is divided into twelve of these. The term is?
What is tectonic?
100
The part of the earth where living organisms such as plants, animals, insects and people are found is? Farmers in the rain forests burn or cut down trees not because they want to, but because they need to feed their families.
What is the biosphere?
100
The three forms of water found on the earth are ?
What are liquid, ice and water vapor?
100
About _______ of the earth's water is fresh water.
What is 2%?
200
Materials that can be replenished and are readily available for use, such as sunlight, water, air, soil, plants and animals are ?
What are renewable resources?
200
An exotic, invasive species that was unintentionally brought to the United States by European ships, which wreaks havoc on freshwater ecosystems is?
What is the Zebra Mussel?
200
The collective mass of water found on, under and over the surface of the earth is?
What is the hydrosphere?
200
The total amount of water on the earth________.
What is "does not change."
200
The four major oceans are the _______, _______, _______ and __________.
What are the Pacific, Atlantic, Indian and Arctic Oceans?
300
Energy resources such as coal, oil or natural gas that are created within the earth from the remains of plants and animals of millions of years ago are ?
What are fossil fuels?
300
The period warming of ocean water in the Eastern Pacific Ocean, which affects natural ecosystems and human-built environments is? Spanish explorers coined the phrase--which refers to the Christ child--and means "the boy"-because the effect hits South America around Christmas.
What is El Nino?
300
The outermost shell of earth,including the crust and the upper part of the mantle is?
What is the lithosphere?
300
The _________ is the movement of water from surfaces of lakes, rivers, and oceans to the air; then to the ground; and then back to the oceans.
What is the water cycle?
300
_________ describes the unpredictable changes in air that occur over a short period of time.
What is weather?
400
An accelerated increase in the surface temperature of the Earth. The best scientific explanation for this theory is the buildup of greenhouse gases, such as carbon dioxide, due to human activity.
What is global warming?
400
The calamitous soil erosion caused by the removal of grasslands and by severe droughts that ruined many farms and farmers in the Great Plains in the 1930s was?
What was the Dust Bowl?
400
Materials that are in limited supply or take a very long time to form, such as fossil fuels like coal, oil or natural gas are?
What are nonrenewable resources?
400
____________ is water that fills tiny cracks and holes in the rock layers below the earth's surface.
What is groundwater?
400
_________ is the usual, predictable pattern of weather in a certain area over a long period of time.
What is climate?
500
Molecules in Earth's atmosphere that absorb energy from the sun and warm Earth's surface. Important ones include carbon dioxide, water vapor and methane. Human activities increase the amount of these gases and are thought to contribute to global warming? What is this?
What are greenhouse gases?
500
A place where communities of living things interact with each other and with nonliving components, such as soil and water is?
What is an ecosystem?
500
A layer of gases-mostly nitrogen and oxygen-that surrounds the Earth and provides the conditions that are favorable for sustaining life is?
What is the atmosphere?
500
________ and _______ hold about 80% of the earth's freshwater.
What are glaciers and polar ice caps?
500
Climate is affected by the _____, wind, ocean currents, _________ and people.