Astronomy Homework 8-1 RUE/FALSE. Write T if the statement is true and F\' if th

Question

Astronomy Homework 8-1 RUE/FALSE. Write T if the statement is true and F' if the statement is false. 1) 2) As viewed from above Earth's North Pole, all of the planets orbit the Sun in the same 2) (counterclockwise) direction. 3) The more massive planets in the solar system tend to be less dense than the lower mass planets. 3) 4) Within the frost line, planetesimals were composed entirely of rock and outside the frost line 4) planetesimals were composed entirely of ice 5) Impacts were extremely common in the young solar system but no longer occur today 6) Earth's atmosphere resulted from the impact of icy planetesimals that originated in the outer 5) 6) regions of the Solar System. 7) Based on our theory of how our own solar system formed, we would expect that other sola 7) systems would be quite common. 8) Nebular theory predicts that other solar systems that formed in the same way should also have 8 8) planets

Explanation / Answer

1. Answer: FALSE

Explanation: Every planet in the solar system rotate in the same direction as they orbit the sun except VENUS and URANUS, all the other planets rotate in anticlockwise direction.

2. Answer: FALSE

Explanation: As viewed from above the north pole i.e from WEST to EAST, every planet orbits the sun counterclockwise direction except VENUS and URANUS.

3. Answer: TRUE

Explanation: Let us consider JUPITER which is the largest and massive planet in the solar system, but it has a very lower density compared to other terrestrial planets.

4. Answer: TRUE

Explanation: Frost line or ice line is basically the dividing point between the interior rocky planets and gaseous outer planets. Inside the frost line temperatures are high and outside the frost line temperatures are cooler.

5. Answer: FALSE

Explanation: The statement is false because even in these recent days we encounter impacts. Best example would be Shoemaker Levey 9 which recently impacted Jupiter.

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