An HR diagram plots a star s luminosity and surface temperature.

a. true

b. false

Which layer is a solid made mostly of nickel and iron? a. crust b. astenosphere c. inner core d. none of the above

What human activity uses the most water worldwide? a. industry b. wastewater c. wells d. agriculture

How many african countries does the tropic of capricorn cross

What are perceptual regions

With whom does Borlaug believe he shares the Nobel Prize?

Which sequence of geologic events is in the correct order, from oldest to most recent? (1) oceanic oxygen begins to enter the atmosphere → earliest stromatolites → initial opening of the Iapetus Ocean → dome-like uplift of the Adirondack region

Adante begins to evaluate the expression 3 1/3 x 5 1/4

Most of the energy the Earth receives from the Sun participates in the water cycle. T F

Give three examples how relations between different races in the United States is still an important issue.

Which of the following is the correct classification of plants, animals and bacteria? Limiting Factors Abiotic Factors Biotic Factors Population