Which is a binary star?

a]Algol

b]the Sun

c]Alpha Centauri

d]Polaris

e]the Big Dipper

The mysterious Dark Energy is slowing the expansion of the universe. is believed to be the dominant form of energy in the universe. is attributed to the gravitational force of black holes. was suggested by the unexpected rotation speeds of galaxies

The Himalayas in South Asia or an example of what type of plate boundary

How do earths layers effect each other

What is the area where an oceanic plate descends into the upper mantle called?

1. name the three types of plate boundaries (and their subtypes), and give an example where each can be found 2. what are the relations, if any, of volcanoes and earthquakes to plate bound-aries? See"plate tectonics and people" on the website 3.

Describe why a "permanent underclass" has developed in many cities, and the problems that result.

What is a disconformity? A. an intrusion that runs between rock layers B. an intrusion that cuts across another rock C. when a sedimentary rock is deposited on top of an eroded non-sedimentary rock D.

What is the action of unearthing something, especially at an archaeological site

What type of damages can you cause while driving

Which of these is an environmental consequence of the shrinking of the Aral Sea? A. The salt content of the water has increased. B. More nesting birds have come to its beaches. C. Fish populations have increased to unhealthy levels. D.