The scientific theory that describes the beginning of the universe is called the
expanding universe theory
contracting universe theory
big bang theory
oscillating universe theory

Big Bang Theory

Explanation:

The big bang theory is the theory currently accepted to explain the beginning of the universe. It was developed in 1948 by scientist George Gamow and priest and astronomer Georges Lemaître.

According to this theory, the universe we know emerged as a result of a powerful explosion that released a great energy capable of creating space-time.

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

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