1. Which of the following poses the greatest safety risk while being heated in a school laboratory?

  • (A) A mixture of iron and sulfur
  • (B) Mercury(II) oxide
  • (C) Sodium chloride
  • (D) Copper(II) sulfate hydrate

2. A piece of paper that appears blue in sunlight is illuminated solely by a red light that is passed through a green fi lter. What color does the paper appear under this illumination?

  • (A) Blue
  • (B) Green
  • (C) Red
  • (D) Black

3. What quantity of oxygen, O2 contains very nearly the same number of molecules as 36.0 grams of water, HO2?

  • (A) 64.0 grams
  • (B) 32.0 grams
  • (C) 16.0 grams
  • (D) 8.0 grams

4. A person heterozygous for the recessive gene for cystic fi brosis marries a person who does not carry or have the trait (homozygous dominant). What is the probability that the couple’s fi rst child will be a carrier?

  • (A) 0.0
  • (B) 0.25
  • (C) 0.50
  • (D) 1.0

5. Which of the following is matched with its correct function?

  • (A) Ovule ….. production of pollen
  • (B) Vascular cambium ….. formation of apical meristem
  • (C) Xylem ….. transport of sugars
  • (D) Guard cell ….. regulation of transpiration rate

6. Scientists believe that a worldwide catastrophic event occurred during the late Cretaceous period. One theory is that this event accounts for which of the following?

  • (A) The movement of aquatic animals onto land
  • (B) The sudden demise of the dinosaurs
  • (C) The emergence of Homo sapiens on the grasslands of Africa
  • (D) The fi rst appearance of mammals

7. The Earth’s seasons can be attributed primarily to which of the following in conjunction with its revolution about the Sun?

  • (A) The tilt of the Earth’s axis of rotation relative to the ecliptic
  • (B) The varying amount of sunspot activity
  • (C) The Earth’s orbit about the Sun as an ellipse rather than a circle
  • (D) The rotation of the Earth during a 24-hour day

8. If each of the following meals provides the same number of calories, which meal requires the most land to produce the food?

  • (A) Red beans and rice
  • (B) Steak and a baked potato
  • (C) Corn tortilla and refried beans
  • (D) Lentil soup and brown bread

9. Which of the following is most likely to cause a rise in the average temperature of the Earth in the future?

  • (A) Atomic warfare
  • (B) CO2
  • (C) Dust clouds from volcanoes
  • (D) Depletion of the Earth’s ozone layer from fossil fuels

10. Which of the following statements is correct about a trophic structure in which a leaf-eating grasshopper is eaten by a frog, which in turn is eaten by a snake?

  • (A) The frog is a herbivore.
  • (B) The snake is a secondary consumer.
  • (C) The grasshopper is a primary consumer.
  • (D) The snakes outnumber the grasshoppers in the community.

11. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?

  • (A) Earthquakes
  • (B) Magnetic reversals
  • (C) Hurricanes
  • (D) Increased deposition of deep-sea sediments

12. Which of the following elements is a metal?

  • (A) S
  • (B) Se
  • (C) I
  • (D) Ga

13. How many moles of HCl must be added to suffi cient water to form 3 liters of a 2 M HCl solution?

  • (A) 1 mol
  • (B) 2 mol
  • (C) 3 mol
  • (D) 6 mol

14. When a gas turns into a liquid, the process is called

  • (A) condensation
  • (B) evaporation
  • (C) deposition
  • (D) sublimation

15. When cool air fl ows from a high mountain region to a region of lower elevation, the air will

  • (A) increase in moisture content
  • (B) become turbulent as fl ow storms develop
  • (C) undergo adiabatic warming
  • (D) undergo adiabatic cooling

16. Animals in which of the following groups may have a backbone and a spinal cord?

  • (A) Mollusks
  • (B) Chordates
  • (C) Invertebrates
  • (D) Echinoderms

17. Polarized sunglasses are used to cut glare from sunlight reflected at a glancing angle off cars, water, and other surfaces. Such sunglasses are a practical application of which of the following physical principles?

  • (A) Brewster’s law
  • (B) Lenz’s law
  • (C) Coulomb’s law
  • (D) Snell’s law

18. Which of the following parts of the Sun is easily visible only during a total solar eclipse?

  • (A) Core
  • (B) Photosphere
  • (C) Sunspots
  • (D) Corona

19. If equal and opposite charges are placed on the two plates of a parallel plate capacitor and the plates are then moved apart, which of the following remain(s) constant?
I. Voltage
II. Capacitance
III. Charge

  • (A) I only
  • (B) II only
  • (C) III only
  • (D) I and II only

20. The true length of a block of wood is 1.010 cm. Three measurements of this block produced the following values: 1.4 cm, 1.2 cm, and 0.9 cm. Which of the following statements is true concerning these measurements?

  • (A) They are precise and accurate.
  • (B) They are precise but not accurate.
  • (C) The are accurate but not precise.
  • (D) They are neither precise nor accurate.

21. Which of the following items will be attracted to the north pole of a permanent magnet by a magnetic force?

  • (A) The north pole of another permanent magnet
  • (B) A piece of iron that is not a permanent magnet
  • (C) A positively charged glass rod
  • (D) A negatively charged rubber rod

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