Scientists believe that earth is becoming warmer. this idea will become unacceptable over time if
it is not discussed in a scientific forum
scientific evidence supports a new idea
scientists propose alternative hypothesis
new instruments are invented to measure temperature

Scientific evidence supports a new idea.

Explanation:

Any hypothesis or scientific statement can only be considered valid if it is supported by a evidences and data obtain or produced after the implementation of experimental procedures. The scientific statement or hypothesis can be considered incorrect or false if more valid evidences obtain in future which may be more acceptable.

Therefore, the idea, Scientists believe that Earth is becoming warmer can become unacceptable over time if new ideas which contradict the given idea comes with valid and supportive ideas.

speed

ratio of distance traveled to time interval

net force

vector sum of forces on object

object

source of diverging light rays either luminous or illuminated

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explanation: