Peter is burning fossil fuels as he uses his lawn mower. Which greenhouse gases is he generating?

A. nitrous oxide and carbon dioxide

B. CFCs and nitrous oxide

C. methane and CFCs

D. carbon dioxide and methane

How does the Milky Way compare with other galaxies within the universe?

Identity one key similarity and one key difference between societies that developed in central and South America to those that developed in north American.

Which of these spheres deals with animals that live in the water: biosphere atmosphere lithosphere none of these

Which agricultural innovation led to an increase in food production and population in Europe during the medieval period? A) green revolution B) two field rotation C) three field rotation D) introduction of the potato

What is at the center of the Milky Way

4. You should expect each child's development to be O A. exactly the same as for the other children in your setting B. different, including meeting milestones a little early or late, and not progressing in each domain at the same time. C.

Without heat from the Sun, the water cycle would

Which instrument sends back radio signals to Earth about temperature at various heights in the atmosphere? A. weather balloon B. radar C. sunscope D. barometer

Why is Splitting a thick log so hard?

If a person's body has a density of 995 kg/m³, what fraction of the body will be submerged when floating gently in (a) freshwater? (b) In salt water with a density of 1027 kg/m³?