The table below compares three galaxies.   1 2 3 Type of galaxy Shape Force holding it together Type of matter present Spiral Pinwheel Gravitational Stars, gas, and dust Elliptical Round or oval Electrical Electrons and protons Irregular Undefined Gravitational Stars, gas, and dust The information about galaxies is correct only in (3 points)

One astronomer is studying the nature of an electromagnetic wave emitted by hot gases in the universe. The electromagnetic wave has higher frequency than visible light but lower frequency than gamma rays. What electromagnetic wave is the astronomer most likely studying? (3 points)

Gamma rays are produced by applying (3 points)

Which of these is a part of the geosphere? (2 points)

Infrared radiations are produced when a changing electric field creates a (3 points)

One student made a science model with a balloon having many spots on it. The balloon was blown up gradually as shown below. What is best demonstrated by this model? (3 points)

Which of these is the best method to measure the distance to a star? (3 points)

Based on an experiment, a cosmologist has proposed a new theory to explain the origin of the universe. The theory will be accepted when (3 points)

Which of these waves travel the fastest? (3 points)

NASA’s space shuttle program in Florida will end in 2011. Which of these statements best describes the outcome of this event on the locations near the space center? (3 points)