1) Which sentence in this selection shows that our Sun is not a part of a star cluster? a) It is so far away from other stars that it does not really interact with them. b) They are so close that their gravity keeps them from drifting away from each other. c) If you can imagine the stars being connected by invisible rods, then you've git the idea. d) Globular and open clusters are different in many other ways, including how they form, what their stars are made of, and where they appear in the universe. 2) In paragraphs 1 and 2, what does the word astronomer mean? a) a designer and maker of telescopes b) an astronaut who travels to different solar systems. c) a writer who creates descriptive names for the stars. d) a scientist who studies stars and other objects in space. 3) What are the main ideas in paragraph 2? a) Gravity holds together star clusters and some star clusters are much larger than others. b) Gravity holds you on the Earth and gravity holds together star clusters. c) Star clusters are made of groups of stars and there are 2 types of star clusters. d) Our sun is a field star, but most stares are in either a globular or open cluster. 4) What claim from the selection does this sentence support? " Only the most powerful telescopes can get a good look at one o them." a) Globular clusters are huge. b) Globular clustes are distant c) Globular clusters are old. d) Globular clusters are spheres. 5) Which of these describes one way in which open clusters and globular clusters are the same? a) Both contain stars that are larger than the Sun. b) Both are impossible to see without a telescope. c) Both are formed through the same process. d) Both contain stars connected by invisible rods. 6) What claim is best supported by this passage? a) Stars occasionally escape from both types of clusters/ b) Stars exist for a longer period of time if they are in open clusters c) People who are not scientist tend to think that all stars are field stars. d) Globular and open clusters are more similar than different. 7) Which detail would be most important to include in a summary of this selection? a) Earth's gravity is what holds people on the planet. b) Globular cluste4rs are spherical, while open clusters can be any shape. c) Even with a good telescope most globular clusters just look like smudges. d) Studying clusters helps scientist learn about the sun.

Star Clusters

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