What is the chemical formula of table salt?
A. KCl
B. NaCl
C. HCl
D. CaCl2
Which part of the human body produces insulin?
A. Liver
B. Kidney
C. Pancreas
D. Spleen
Which vitamin is produced when skin is exposed to sunlight?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin K
The force that keeps us on the ground is called:
A. Magnetism
B. Friction
C. Gravity
D. Pressure
Blood in arteries is usually:
A. Blue
B. Green
C. Red
D. Yellow
Which gas is released during photosynthesis?
A. Carbon dioxide
B. Nitrogen
C. Oxygen
D. Methane
The largest organ in the human body is:
A. Heart
B. Brain
C. Skin
D. Liver
Water covers approximately what percentage of Earth’s surface?
A. 50%
B. 60%
C. 71%
D. 80%
The process of water changing from liquid to gas is called:
A. Condensation
B. Freezing
C. Evaporation
D. Sublimation
Which part of the human brain controls balance?
A. Cerebrum
B. Cerebellum
C. Medulla
D. Hippocampus