| Canadian Shield | a huge, rocky region that curves around Hudson Bay like a giant horseshoe. The Shield covers half the land area of Canada. |
| Leduc | On 13 Feb 1947, the Leduc No 1 well, in Alberta, successfully tapped the huge Leduc oil field. By the end of 1947, some 30 wells in the field were producing 3500 barrels of oil a day. |
| Tectonic Movement | belonging to the structure of the earth’s crust and to general changes in it, such as folding or faulting. |
| environment | all of the surrounding things, conditions, and influences affecting the growth or development of living things. |
| minerals | a substance obtained by mining or digging in the earth |
| petroleum | an oily, dark-colored, flammable liquid found in the earth, consisting mainly of a mixture of various hydrocarbons |
| salt | a white substance found in the earth and in seawater; sodium chloride; table salt. Salt is used to season and preserve food and in many industrial processes |
| sedimentary rock | rocks fromed from sediment derived not only from rock fragments but also from plant and animal remains |
Drag corresponding items onto each other to make them disappear.
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