Which gas is responsible for the greenhouse effect?
a. Oxygen
b. Nitrogen
c. Carbon dioxide
d. Hydrogen
What is the chemical symbol for water?
a. W
b. H2O
c. O2
d. CO2
Which vitamin is also known as the “sunshine vitamin”?
a. Vitamin A
b. Vitamin C
c. Vitamin D
d. Vitamin E
What is the chemical symbol for gold?
a. Au
b. Ag
c. Fe
d. Cu
What is the largest planet in our solar system?
a. Earth
b. Mars
c. Jupiter
d. Saturn
Which gas do plants absorb during photosynthesis?
a. Oxygen
b. Nitrogen
c. Carbon dioxide
d. Hydrogen
What is the process by which plants make their own food?
a. Respiration
b. Photosynthesis
c. Digestion
d. Transpiration
Which metal is liquid at room temperature?
a. Iron
b. Copper
c. Mercury
d. Aluminum
What is the chemical formula for table salt?
a. NaCl
b. HCl
c. KCl
d. CaCl2
Which gas is responsible for the color of the Earth’s sky?
a. Oxygen
b. Nitrogen
c. Carbon dioxide
d. Oxygen and Nitrogen mixture