Question

base your answer to questions 10 and 11 on the passage below and on your knowledge of earth science. cosmic microwave background radiation in the 1920s, edwin hubbles discovery of a pattern in the red - shift of light from galaxies moving away from earth led to the theory of an expanding universe. this expansion implies that the universe was smaller, denser, and hotter in the past. in the 1940s, scientists predicted that heat (identified as cosmic microwave background radiation) left over from the big bang would fill the universe. in the 1960s, satellite probes found that cosmic microwave background radiation fills the universe uniformly in every direction, and indicated a temperature of about 3 kelvins (k). this radiation has been cooling as the universe has been expanding. 10)which graph best shows the relationship of the size of the universe to the temperature indicated by the cosmic microwave background radiation?

Explanation:

Step1: Analyze the relationship

The passage states that the universe was smaller, denser, and hotter in the past and the cosmic - microwave background radiation has been cooling as the universe has been expanding. So, as the size of the universe increases, the temperature indicated by the cosmic - microwave background radiation decreases.

Step2: Match the graph

Graph (3) shows a decreasing relationship between the size of the universe (x - axis) and the temperature (y - axis).

Answer:

(3)