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59 Cards in this Set
- Front
- Back
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round like ball |
sphere |
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What is at the top of the globe |
North Pole |
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What is at the bottom of the globe |
South Pole |
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The imaginary line around the earth that is exactly halfway between the North and South Pole |
equator |
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Each half of the earth is called? |
hemisphere |
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What is the diameter of the earth? |
8,000 miles |
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distance around the outside of an object |
circumference |
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straight line through the center of the circle, ending up at a point exactly opposite from where the line begins |
diameter |
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spinning motion of the earth |
rotation |
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imaginary line that the earth rotates on |
axis |
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how long does it take for the earth to rotate |
24 hours |
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The earth rotates in what direction |
west to east |
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what do you call the way the earth moves around the sun |
revolves |
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the pathway the earth makes around the sun |
orbit |
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How long does it take the earth to revolve around the sun |
365 1/4 |
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what keeps the earth rotating around the sun |
gravitiy |
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why do we have seasons |
because as the earth revolves around the sun, its axis remains tilted at an angle |
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largest ocean |
Pacific Ocean |
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deepest ocean |
Pacific Ocean |
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saltiest ocean |
Atlantic Ocean |
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warmest ocean |
Indian Ocean |
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coldest ocean |
Arctic Ocean |
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smallest ocean |
arctic ocean |
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largest areas of dry land that rise out of the oceans |
continents |
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largest continent |
Asia |
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second largest continent |
Africa |
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continent with United States, Canada, Mexico |
North America |
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continent with Brazil, Chili, Peru |
South America |
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only continent where no people except researchers live |
Antarctica |
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continent where the people are from that settled most of North America and South America |
Europe |
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smallest continent |
Australia |
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sometimes called the island contienent |
Australia |
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What 2 things does soil contain |
1. minerals from tiny pieces of weathered rock 2. decayed material from dead plants |
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decayed material in soil |
hummus |
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scientist who study the earth |
minerals |
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characteristics of a mineral |
1. never manmade and is never made of things which were once alive 2. always made up of exactly the same kinds of atoms 3. atoms are always arranged in an orderly pattern |
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substances having smooth, flat surfaces that meet in sharp edges and corners |
crystals |
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very rare and costly minerals such as diamonds, rubies |
gems |
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what mineral is the lead in your pencil |
graphite |
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The upper layer of soil. This is the layer of soil that supports plant life |
topsoil |
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what is made up of coarse particles of rock |
sand |
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what is below the topsoil, it is not fertile |
subsoil |
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below the suboil, it is part of earth's crust |
bedrock |
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solid layer of rock which begins beneath the soil and goes down 5 miles to 25 miles below the earths surface |
crust |
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layer of earth below the crust |
mantle |
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liquid rock |
magma |
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How far does the mantle go down |
1,800 miles |
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what is at the center of the earth |
core |
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using nature's resources wisely |
Conservation |
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material helpful to man which is found in or on the earth |
natural resource |
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massive rivers of ice that move very slowly carrying with them broken rocks and soil |
glaciers |
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matter that settles to the bottom or sides of a body of water |
sediment |
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deposit of sand and soil usually in a trangular shape at the mouth of some rivers |
delta |
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solid material which forms the earths crust |
rocks |
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what are the 3 main groups of rocks |
igneous, sedimentary, metamorphic |
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rocks formed from hot magma |
igneous rock |
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rock formed when sediments are pressed together under the earth so it hardens |
sedimentary rock |
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rock formed when it is changed by heat or pressure |
metamorphic rock |
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