

She has a theory about how the universe began.
A set of ideas intended to explain something.
He proposed a new theory about climate change.
The scientist tested her theory with experiments.
Many people believe in the theory of evolution.
scientific theory
theory of relativity
theory of everything
hypothesis
concept
model
His theory needs more evidence to be accepted.
A guess or hypothesis that is not yet proven.
Her theory explains the strange behavior of the animals.
The scientist proposed a new theory about climate change.
Many people support his theory, but it still needs testing.
scientific theory
theory of evolution
theory and practice
hypothesis
idea
concept