Our Environment

1. _________________ are connected to a mainland and usually have water on only three sides.
5. The Midwest and Southeast have the most __________________ areas in the United States (look at the map on p.21).
6. Farmers conserve resources by planting grasses near their crops to prevent _______________ by rain, wind and nearby rivers.
8. Some companies can help _______________ natural resources by using recycled materials to make new products.
10. An ___________________ can shake the Earth and cause landslide and mudslides.
11. The largest landforms on Earth are called ________________ and the Earth has seven of these.
13. ____________________ resources are those that take a long time to replace or cannot be replaced after they are used.
14. People can modify rivers by building _________, which can make electricity and also affect the habitats that animals and plant rely on.
15. Forests and tall grasses are two types of ___________________ found in areas that get plenty of rain.
16. The Northeast and Midwest have the most __________________ resources in the United States (look at the map on p.21)
17. The Mississippi River flows through the Midwest and _______________ regions in the United States.

2. In a city, people can build more roads, train tracks, and __________________, or tall buildings, to adapt to the growth in population.
3. A __________________ is a big storm with strong winds and heavy rainfall which can cause flooding.
4. Two types of ______________ regions found in the United States are temperate and desert.
6. In an _______________, all living things, such as plants and animals interact with each other.
7. A _______________ has eruptions that form mountain chains.
9. The Great Lakes and Rio Grande are physical feature that form country ______________ with Canada and Mexico.
12. The climate of a place affects the plants that grow there. Both the ____________________ and the amount of rainfall determine the types of vegetation that grow.