| A | B |
|---|
| unit | an amount that is used to measure things |
| gram | a unit of mass in the metric system |
| metric system | the units of measurement used by scientists |
| kilogram | 1000 grams |
| mega | one million ( 1, 000, 000) |
| kilo | one thousand ( 1, 000) |
| hecto | one hundred ( 100) |
| deca | ten (10) |
| deci | one tenth (1/10) |
| centi | one hundredth ( 1/100) |
| milli | one thousandth ( 1/1, 000) |
| micro | one millionth ( 1/1,000,000 |
| 10 millimeters | 1 centimeter |
| 1000 millimeters | 1 meter |
| 100 centimeters | 1 meter |
| 1,000 meters | 1 kilometer |
| meter | the unit of length in the meter system |
| Area | length X width |
| Volume | length X width X height |
| Density | heavy for its size |
| observation | a fact about our surrounding to make obtained by using our senses |
| instrument | something that helps our senses make accurate observation |
| hypothesis | a guess based on accurate observations |
| sphere | a ball or globe |
| hydrosphere | the part of the earth's surface covered by water |
| lithosphere | the solid part of the earth |
| atmosphere | the air around us |
| crust | the thin outside layer of the Earth |
| mantle | the thick layer of the earth just under the crust |
| core | the center part of the earth |
| model | something that represents the real thing |
| distorted | not showing correct distance, shape, or direction |
| hemisphere | one half of a globe or sphere |
| map projection | flat map made with the help of a globe |
| parallels | imaginary lines running horizontally around the earth |
| meridians | imaginary lines running from North Pole to South Pole |
| latitude | the number of degrees by which a place on the earth is north or south of the equator |
| longitude | the number of degrees by which a place on earth is east or west of the prime meridian |
| map scale | a map feature that tells how map distances compare to real distances on Earth |
| map symbols | simple drawings used on a map to represent real objects |
| sea level | the average level of water in the oceans |
| elevation | the distance of a point above or below sea level |
| contour | a line on a map showing points having the same elevation |
| topographic | a land map that uses contour lines to show elevations |
| contour interval | the difference in elevation between two neighboring contour lines |
