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Exam1post - Multiple Choice 1-32(1.5 points each Circle the...

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Multiple Choice: 1-32 (1.5 points each). Circle the best answer here and fill in your bubble sheet. This portion of the exam will be graded using the bubble sheets only. 1. According to modern science, the Earth formed ______ years ago and the first fossils appeared __________ years ago. a. 15 billion, 6 thousand c. 4.6 million, 5 million e. 6 thousand, 3 thousand b. 46 million, 35 million d. 4.6 billion, 3.5 billion 2. Approximately what percentage of the Earth's water is salt water? a. 75% c. 3% e. 68.5% b. 25% d. 97% 3. The first atoms formed… a. One second after the big bang c. One billion years after the big bang e. 16 billion years ago b. 300,000 years after the big bang d. Five billion years ago 4. Ozone forms when: a. CO 2 and O 2 combine c. O 3 combines with O 2 e. O and O combine b. O 3 combines with O d. O 2 combines with O 5. The Ozone layer protects the Earth from: a. Ultraviolet radiation c. Heating up e. Too much free Nitrogen b. Sun's magnetic field d. Comets 6. Which subatomic particles are always equal in electrically neutral atoms? a. Electrons and neutrons c. Neutrons and protons e. None of these b. Electrons and neutrinos d. Electrons and protons 7. Potassium has an atomic number of 19, how many electrons does it have in its outermost (third) shell? a. 2 c. 6 e. 9 b. 4 d. 10 8. Isotopes of the same element differ in the number of: a. Electrons c. Protons e. Neutrons b. Protons and neutrons d. Electrons and protons 9. Radioactive elements usually have an excess number of: a. Electrons c. Protons e. Protons and neutrons b. Neutrons d. Ions 10. What is formed when an atom loses or gains an electron? a. New element c. Ion e. Molecule b. Isotope d. Radioisotope 11. Zinc has an Atomic Number of 30 and a Mass Number of 65. How many neutrons are in the nucleus of a Zinc Atom? a. 30 c. 95 e. 60 b. 5 d. 35 12. Consider this chemical equation: H + + HCO 3 - H 2 CO 3 . In this equation, what is HCO 3 - ? a. Acid c. Salt e. R group b. Base d. Isotope
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Name ________________________ Biol 1102 Exam 1 2 13. When you hyperventilate, you could experience which of the following conditions? a. Increasing CO 2 levels c. Too little oxygen e. Respiratory acidosis b. Acidic blood d. Decreasing CO 2 levels 14. Animals store their excess glucose in the form of _______________ , while Plants store their excess glucose in the form of __________ . a. Glycogen, cellulose
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Exam1post - Multiple Choice 1-32(1.5 points each Circle the...

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