Celestial Objects and Big Bang theory — task. Science State Board, Class 7.

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Choose the best answers.

1. Retrograde motion describes the ___________

uniform circular motion exhibited by the planets.
backward motion of the stars relative to Earth.
irregular speeds at which the planets travel.
backward motion of the planets with respect to the stars.

2. How old is our universe?

14 thousand years
14 billion years
14 million years
14 trillion years

3. Celestial Object's

and

are determined by epicycle model.

Answer variants:

Direction

Axis

Speed

Distance

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