| A | B |
|---|
| glacier | A slow moving mile-thick sheet of ice. |
| peak | the top of a mountain |
| reproduction | a copy of a real item, usually an artifact or something of value |
| democracy | “rule by the people” a government in which people make their own laws and elect their own leaders. |
| canal | A man-made ditch or waterway that often connects other waterways |
| lock | A water elevator used to raise and lower boats |
| skyscraper | A very tall building such as the Empire State Building in NYC |
| mass production | A way of making very large quantities of the same product |
| mill | A factory in which people make products out of raw materials |
| wage | payment of money for work done |
| megalopolis | Great city (refers to a string of big cities so close to one another that they almost make one gigantic city across the Northeast) |
| population density | A measure of how many people live in a given amount of land |
| pollution | Any substance that makes air, water, or soil dirty or unsafe |
