Q: Moving water in a river is considered a renewable resource because it OPTIONS:
- carries dissolved oxygen
- easily erodes sediments
- is made of natural gas
- can be recycled by nature over time
A: can be recycled by nature over time
What is the primary energy source that drives all weather events, including precipitation, hurricanes, and tornados?
OPTIONS:
- the Sun
- the Moon
- Earth's gravity
- Earth's rotation

the Sun
Q: The heart, veins, arteries, and capillaries make up which organ system? ---- OPTIONS:
- reproductive
- muscular
- excretory
- circulatory

A: circulatory
Which sentence best describes the organization of the heart?
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OPTIONS:
- The heart is an organ made up of different types of tissues, each of which has different types of cells.
- The heart is a tissue made up of different types of organs, each of which has different types of cells.
- The heart is a system made up of one type of tissue and identical cells.
- The heart is a tissue made up of one type of organ and identical cells.

The heart is an organ made up of different types of tissues, each of which has different types of cells.
Question:
A scientist studies the remains of two extinct animals to learn more about how they lived. She determines that one animal was a carnivore and the other was an herbivore. Which of the following did the scientist most likely compare to make this conclusion?
OPTIONS:
- the number of bones in the animals
- the size of the animals
- the body covering of the animals
- the skull of the animals
Answer:
the skull of the animals
*Question*: What is the most likely outcome of the Moon moving away from Earth? OPTIONS:
- A lunar day is shorter.
- A lunar eclipse lasts longer.
- Earth moves closer to the Sun.
- Earth's tides decrease in size.
*Answer*:
Earth's tides decrease in size.