Which element is a noble gas?
A. Oxygen
B. Nitrogen
C. Helium
D. Hydrogen
Lightning is a form of:
A. Magnetism
B. Electricity
C. Friction
D. Radiation
The chemical formula of carbon dioxide is:
A. CO
B. C2O
C. CO2
D. C2O3
The layer of air surrounding the Earth is called:
A. Hydrosphere
B. Lithosphere
C. Atmosphere
D. Magnetosphere
The smallest blood vessels in the human body are:
A. Veins
B. Arteries
C. Capillaries
D. Venules
The major component of glass is:
A. Calcium
B. Sodium
C. Silicon dioxide
D. Carbon
Which planet rotates on its side?
A. Earth
B. Jupiter
C. Uranus
D. Saturn
The study of fossils is called:
A. Botany
B. Meteorology
C. Paleontology
D. Zoology
The process by which plants lose water through leaves is called:
A. Respiration
B. Photosynthesis
C. Transpiration
D. Evaporation
Which organ in the human body produces insulin?
A. Liver
B. Pancreas
C. Kidney
D. Heart