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

Describe how Hess's theory explains why there is no ocean rock older than 200 million years

Which state has four times as many cows as people?

Individual city-states developed in Greece because the country was divided by Mountains Lakes Rivers

What took place in Nicaragua after a cease fire was agreed to in 1990?

When Americans moved west in the 1800s, they did this for many reasons. Which of the following reasons is an example of a pull factor that encouraged Americans to migrate?

Which best describes Oceania? A. A region with many isolated island nations B. A region united under a central government C. A region with a shared common language D. A region with a strong unified sense of culture

How did our exploration of the moon differ from that of mercury (and the other planets) ?

Which statement about the location of the Baltic states is not true? They have access to trade with large countries. Their remote location has kept out invaders. They have ports on well-traveled sea routes. Their climate is mild due to ocean breezes.

What ocean zone is below the Abyssal Zone?

How much of egypt fertile farmland was located in the nile delta?