4. Which of the following is a chemical change?

1. condensation

2. evaporation

3. solidifcation

4. rotting of food

Explain the environmental consequences of agricultural practices

Which region includes the most states

Why was racism a factor in the colonization of the African continent? A. Most of the world believed that Africans were superior, and the Europeans wanted to compete. B.

Why do you think the conservation of wildlife is essential

If gasoline produces only carbon dioxide and water when it burns completely, why is automobile exhaust a source of air pollution even before it begins to react with other chemicals in the air?

What should a farmer do who wants to keep his soil as productive as possible

1. Describe the most important diagnostic properties in igneous rocks. 2. What minerals would you expect to form in basalt? (Hint: Consider composition and Bowen's reaction series). Explain your answer.

What is the most important role of the ecosystems of the Andes? A. Keep the environment stable and reduces air pollution B. Reduce the chance of floods, desertification, and landslides C. Regulate the availability of freshwater D. All of the above

All of the following are examples of thematic maps except:

Which is used by scientists as evidence that Earth's inner core is solid? O A. S waves cannot travel through the inner core, creating a shadow zone. O B. Seismic waves change speed when they go from the inner core to the outer core. O C.