Which variable stars have pulsation periods between 1.5 hours and 1.2 days? A. Protostars

B. Cepheid variables

C. RR Lyrae variables

D. Nebulas

How can two regions with the same average yearly temperature have different climate ratios?

5. All of the following can be caused by plate movement except 1 earthquakes 2 tsunamis 3 volcanoes 3 hurricanes

Why do you think that people disagreed about the shape of the Earth?

Scientists have used the fossil record, evidence of change, and mass extinction to develop which of the following time scales? A. Precambrian Time Scale B. Geological Time Scale C. Fossilogical Time Scale D. Earth History Time Scale

What are two ways human activity can lead to eutrophication

Which Old World crop introduced by the Spanish most dramatically increased demand for African slaves in the Caribbean? a. Wheat b. Indigo c. Sugar d. Rice

What do stream terraces represent? Put another way, what were stream terraces before they became a terrace?

The American Revolution inspired the French Revolution. True False

Identify and explain three past or current consequences of the Partitioning of India in 1947.

Why is the black earth region in Russia called Black Earth?