TLS Online TPP Program

#Question id: 9154


The main reason polar regions are cooler than the equator is that ________.

#Unit 9. Diversity of Life Forms
  1. solar radiation strikes the poles at a lower angle and travels through more atmosphere
  2. the poles are farther from the sun than is the equator
  3. the polar atmosphere is thinner and contains fewer greenhouse gases
  4. the poles are permanently tilted away from the sun