Which planet has the fastest orbit around the Sun?
A. Venus
B. Earth
C. Mercury
D. Mars
Which vitamin is produced in the skin with sunlight?
A. Vitamin A
B. Vitamin B
C. Vitamin D
D. Vitamin K
The study of insects is called:
A. Botany
B. Herpetology
C. Ornithology
D. Entomology
The primary gas in natural gas is:
A. Oxygen
B. Hydrogen
C. Methane
D. Carbon dioxide
Which planet is closest to the Sun?
A. Venus
B. Earth
C. Mars
D. Mercury
What type of celestial body is the Sun?
A. Planet
B. Star
C. Moon
D. Asteroid
The force that opposes motion is called:
A. Gravity
B. Tension
C. Magnetic
D. Friction
The process of water turning into vapor is called:
A. Freezing
B. Condensation
C. Evaporation
D. Sublimation
The smallest unit of an element is:
A. Molecule
B. Atom
C. Cell
D. Particle
The largest planet in the solar system is:
A. Earth
B. Jupiter
C. Saturn
D. Uranus