Extinction & Rapid Change

Question 1

What is the main natural phenomenon that causes the rise and fall of ocean tides on Earth?

Accepted Answer

The gravitational pull of the Moon on Earth's oceans.

Answer

Wind patterns over the ocean surface.

Answer

The gravitational pull of the Sun on Earth's oceans.

Answer

The rotation of the Earth causing centrifugal force.

Question 2

Which of the following is a modern biotechnology that lets scientists directly change an organism’s DNA sequence to create a desired trait?

Accepted Answer

CRISPR‑Cas9 gene editing

Answer

Applying fertilizer to soil

Answer

Selective breeding of crops

Answer

Cloning an animal

Question 3

Which statement correctly describes the cause of a lunar eclipse?

Accepted Answer

It occurs when the Earth comes between the Sun and the Moon, and the Earth's shadow falls on the Moon.

Answer

It occurs when the Moon is on the opposite side of the Earth from the Sun, but the Earth, Moon, and Sun are not aligned.

Answer

It occurs because the Moon passes through the Earth's atmosphere, causing it to appear reddish.

Answer

It occurs when the Moon comes between the Sun and the Earth, and the Moon's shadow falls on the Earth.

Try three questions