Name these from smallest to biggest

Rivers

Rills

Tributary

Streams

Runoff

Gullies

How is the cross sectional shape of a glacial valley different from a valley formed by stream erosion?

Which of the following does not contribute to increased air quality? A. The Clean Air Act B. Hybrid cars C. Energy-efficient appliances D. Use of CFCs

A thunderstorm with a persistent rotating updraft is called a

During an earthquake, some of the crust can sink under the ocean. -True -False

Which internal energy source is the most important in continuing to heat the terrestrial planets today? a. radioactivity b. accretion c. differentiation d. tidal heating e. all of the above

Which best describes why wind movement is predictable

What did the Europeans call the natives that they first met in the tundra region Canada?

According to the article about coral reefs, which of the following problems is threatening the world's reefs today? A. heavy winds B. freezing air temperatures C. rising sea temperatures D. lower pollution

How does transportation in cities differ from transportation in the country? Check all that apply. A. Streets are generally not designed for pedestrians. B. Travel is exclusively by car. C. There are more public transportation options. D.

There are 51 students going on a field trip. Each van holds 8 students. How many vans are needed?