1. Heat from the sun gets to the earth by which process?
Radiation
Conduction
Convection
Evaporation
2. What is the chemical symbol of gold?
Ag
Au
Hg
Cu
3. What is steel?
Alloy
Composite
Element
Molecule
4. Bronze is an alloy made from what two metals?
Copper and zinc
Copper and nickel
Copper and silver
Copper and tin
5. What metal has the chemical symbol of Pb?
Platinum
Palladium
Lead
Tin
6. Which acids do lemons contain?
Tartaric acid
Citric acid
Acetic acid
Acetylsalicylic acid
7. Which acid is found in bee venom?
Ascorbic acid
Carbonic acid
Formic acid
Sulfuric acid
8. What is the main gas found in the air we breathe?
Oxygen
Carbon dioxide
Argon
Nitrogen
9. Olympus Mons is a large volcanic mountain on which planet?
Earth
Mars
Venus
Jupiter
10. What is the name of the substance that gives skin and hair its pigment?
Keratin
Melanin
Hemoglobin
Zeaxanthin
