1. what is the most abundant gas in the atmosphere?

nitrogen

2. The form of oxygen that combines three oxygen atoms into each molecule is called? ozone

3. most important weather phenomena occur in the?

troposphere

100% correct.

Which country introduced the concept of ecotourism to the region? a. guatemala b. nicaragua c. costa rica d. el salvador

Which evidence convinced many geologists that the continents were slowly moving? A. the fit of the continents together B. seafloors older than the continents C. alternating symmetrical patterns of paleomagnetism on the seafloor D.

What landform is created when glaciers erode backwards?

Where is the safest place in a house to be when an earthquake occurs?

how can i write an essay that discusses whether you believe that your local power company is doing enough to reduce dependence on nonrenewable energy sources.

The main plant adaptations in the tropical rainforest environment

1. What's the definition for ecological perspective 2. What the definition for spatial perspective

Which of the following terms describes a family structure headed by a woman?

Which of these is a renewable resource? a. coal b. cotton c. copper d. petroleum

What are the classifications for the six major land areas on earth?