Read the article to learn more about spiral galaxies. Spiral Galaxy Why are spiral galaxies so bright?

what do you think the relationship is between the distance of each planet from the sun and its orbital period

Which statement is true regarding the positioning of Africa's climatic zones?

The process by which sediment becomes rock is called A. striation. B. lithification. C. foliation. D. deposition.

Which of these is only part of South America

An archipelago is a narrow strip of land connecting two larger landmasses. a. True b. False

Global climate change will have no impact to life on the earth. true or false.

Physical environments can change the way we live: we may change our behaviors, habits, or traditions based on our surroundings. We also choose physical environments that best fit our needs and our culture.

Charge-coupled devices (CCDs) are used in which of the following gadgets? A. mouse B. keyboard C. monitor D. scanner

A star with a continuous spectrum shines through a cool interstellar cloud composed primarily of hydrogen. The cloud is falling inward toward the star (and away from Earth). Which best describes the spectrum seen by an Earthbound observer

Where does most seismic activity occur?