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

Why is the Great Seal important in government?

What issues do economic interest groups focus on?

Which of the following best describes why water use and globalization are closely related A) every country has an independent water supply, so it is up to them to make sure it is clean B) water sources and water pollution exist across boundaries C)

Which seven latin american countries do the andes mountains run

Global warming is melting the ice caps. What is the most likely effect on coastal bird species that nest near the ocean?

The different plants that replace earlier varieties in the wake of a brush fire is an example of A. plant succession. B. photosynthesis. C. soil regeneration. D. plant community.

Would first nation people be for or against the windmills?

Which mineral property describes a mineral's resistance to being scratched A) streak B) fracture C) cleavage D) hardness

How was the great rift valley formed?

Which African crop has come to supply nearly 70 percent of the worlds heroin