Question 1

The average time for an atom to decay is called its _________.

Accepted Answer

The average time for an atom to decay is called its half-life, which is the time required for half of the radioactive atoms in a sample to decay.

Question 2

Kant and Laplace proposed this theory of the Solar System formation: _____.

Accepted Answer

Kant and Laplace proposed the solar nebula theory, which suggests that the Solar System formed from the gravitational collapse of a fragment of a giant molecular cloud. This theory explains the formation of the Sun and the planets from a spinning disk of gas and dust.

Question 3

The solar system was born from

Accepted Answer

The solar system formed from the gravitational collapse of a giant interstellar molecular cloud, the solar nebula, not from the capture of planets, collision of stars, or debris from the Sun.

Question 4

The process of big particles sticking together is called __________.

Accepted Answer

The answer of The process of big particles sticking together...

Question 5

Dense materials sinking and light materials floating up cause ______ in the body.

Accepted Answer

The answer of Dense materials sinking and light materials floating...

Question 6

Meteorites are small chunks of asteroids that have landed on the Earth.

Accepted Answer

Meteorites are indeed small pieces of asteroids or sometimes comets that survive their passage through the Earth's atmosphere and land on the Earth's surface.

Question 7

One of the reasons that Mercury has little or no atmosphere is its small mass.

Accepted Answer

Mercury's small mass means it has a weak gravitational pull, making it unable to retain a significant atmosphere against solar radiation and the solar wind.

Quiz 35: The Origin of the Solar System