1) 1. Which subatomic particle has no electric charge? a) A) Proton b) B) Neutron c) C) Electron d) D) Positron 2) 2. What law states that pressure and volume of a gas are inversely proportional (at constant temperature)? a) A) Boyle’s Law b) B) Charles’s Law c) C) Avogadro’s Law d) D) Dalton’s Law 3) 3. The ozone layer is primarily found in which part of Earth’s atmosphere? a) A) Troposphere b) B) Mesosphere c) C) Stratosphere d) D) Thermosphere 4) 4. Which vitamin is synthesized in the human body when exposed to sunlight? a) A) Vitamin A b) B) Vitamin B12 c) C) Vitamin C d) D) Vitamin D 5) 5. In genetics, what does the term “heterozygous” mean? a) A) Having two identical alleles of a gene b) B) Having two different alleles of a gene c) C) Lacking alleles completely d) D) Having three alleles of a gene 6) 6. Which element has the highest electrical conductivity? a) A) Copper b) B) Gold c) C) Silver d) D) Aluminum 7) 7. The first law of thermodynamics is essentially a statement of: a) A) Conservation of mass b) B) Conservation of energy c) C) Increase in entropy d) D) Conservation of momentum 8) 8. Which scientist proposed the uncertainty principle in quantum mechanics? a) A) Albert Einstein b) B) Werner Heisenberg c) C) Niels Bohr d) D) Max Planck 9) 9. In humans, which organ is the main site of detoxification of harmful substances? a) A) Kidney b) B) Liver c) C) Pancreas d) D) Spleen 10) 10. Which chemical bond involves the sharing of electron pairs between atoms? a) A) Ionic bond b) B) Metallic bond c) C) Covalent bond d) D) Hydrogen bond

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