Describe what has happened to levels of carbon dioxide in the atmosphere over the past 200 years

Proxies are indirect estimates of temperature, ocean salinity, precipitation, and other environmental parameters. a. True b. False

Why are invasive species dangerous to the environment? Check all that apply. A. They outcompete native species for resources. B. They compete for native mates and reproduce slowly. C. They cause harm to property that can cause economic loss. D.

Creole is: A minor language A lingua franca A primary language A taxonomy

Choose three possible pollutants to ground water. fertilizer/chemicals trees animal feces oil/gas spills rocks

To which country does easter island belong?

Organic material porvidrd nitrogen for plants. Which soil component contributes the most nitrogen to plants?

In general, in which direction did the black death spread during the 14th century?

How do icebergs contribute to deep ocean-basin sediments

Crop rotation? a. improves soil fertility b. shortens the growing season c. has only been in use for a few years d. is only worthwhile for small farmers

Cindy takes two pages of notes during each hour of class after attending 17 hours of class how many total pages of notes will Cindy have in her notebook