Question

1. what is one major piece of evidence that the big bang theory is correct? * 1 point

a. astronomers have detected leftover radiation from the big bang

b. everything in the universe has remained in the same location for billions of years

c. astronomers have discovered that the universe is no longer expanding

d. astronomers have discovered evidence that the universe will soon begin contracting in a \big crunch\

Explanation:

The cosmic - microwave background radiation is a major piece of evidence for the Big Bang theory. It is the leftover radiation from the early universe when it was extremely hot and dense. Option b is incorrect as objects in the universe are in motion due to gravitational and other forces. Option c is wrong because the universe is still expanding. Option d has no scientific basis as there is no evidence that the universe is about to start contracting in a "Big Crunch".

Answer:

A. Astronomers have detected leftover radiation from the Big Bang