Input: Answer this question:
Which statement best explains Earth's day and night cycle?
OPTIONS:
- Earth rotates once each day on its axis.
- Earth revolves around the Sun each year.
- The Sun is closest to Earth during the day.
- The tilt of Earth changes throughout the year.
Answer: Earth rotates once each day on its axis.
*Question*: Scientists working for a company are testing a new medicine that they think will help heal damaged tissue. In which part of the company are the scientists working? OPTIONS:
- distribution
- mass marketing
- public relations
- research
*Answer*: research
question:
Typically, sedimentary rocks are formed
OPTIONS:
- only in erupting volcanoes.
- only under great pressure and high temperatures.
- below Earth's surface as magma cools and crystallizes.
- from materials that settle.

answer:
from materials that settle.
[Q]: What happens to water molecules during the boiling process?
===
OPTIONS:
- They move faster and move farther apart as they absorb heat.
- They move faster and remain close together as they absorb heat.
- They move more slowly but move farther apart as they lose heat.
- They move faster and move farther apart as they lose heat.
****
[A]: They move faster and move farther apart as they absorb heat.
question below:
Scientists think that dolphins and whales may have evolved from a common ancestor. What evidence supports this hypothesis?
OPTIONS:
- They swim the same way.
- They eat the same food.
- They live in the same area of the ocean.
- They have similar anatomies.
answer below:
They have similar anatomies.
question below:
A scientist finds the bones of a dinosaur. What could help the scientist determine the approximate age of the dinosaur bones?
OPTIONS:
- the birds living in the area of the bones
- the weather conditions in the area of the bones
- the kinds of trees living in the area of the bones
- the index fossils in the area of the bones
answer below:

the index fossils in the area of the bones