Which planet in the solar system has the most moons?
Hydrogen has the atomic number 1. This means that hydrogen has:
Which U.S. space program is responsible for putting 12 men on the moon?
Organisms that eat other organisms are called:
Unlike most other fish, sharks have no:
What human organ is responsible for cleaning the blood?
Kinetic energy is the energy that:
The brainstem controls:
What element is the most abundant one in the atmosphere?
Minerals are necessary for:
How many planets in the solar system have rings?
The temperature at which a solid becomes a liquid is its:
The surface of the earth is called the:
Not counting the sun, the closest star to the Earth is:
The ovaries produce:
An earthquake that measures 4 on the Richter Scale would be how many times stronge...
Absolute zero is:
What does the term forensic mean?
Which of the following statements is not true?
A lunar eclipse occurs when: