6. The intersecting lines drawn on maps and globes are

A. latitudes
B. longitudes
C. geographic grids
D. None of the above

7. The light of distant stars is affected by

A. the earth’s atmosphere
B. interstellar dust
C. both (a) and (b)
D. None of the above

8. The landmass of which of the following continents is the least?

A. Africa
B. Asia
C. Australia
D. Europe

9. Without ____ the equator would be much hotter than it is while the poles would be much cooler.

A. latitudinal redistribution of heat
B. cycle of air circulation
C. global wind pattern
D. All are similar terms

10. The habitats valuable for commercially harvested species are called

A. coral reefs
B. seagrass bed
C. hot spots
D. None of the above