#1 Control subjects in a double blind test of a new drug are A informed of what

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#1 Control subjects in a double blind test of a new drug are

      A informed of what drug they are getting.
      B informed of what drug they are getting, but their private physicians are not.
      C given larger doses of the drug.
      D stricken with a different disease than the experimental subjects.
      E not given the experimental drug but are otherwise treated the same as the experimental subjects.

#2 Deductive reasoning is used to make _____ based on a hypothesis.

      A. data
      B. theories
      C. statistical tests
      D. correlations
      E. predictions

#3 How many grams of sugar are in a bottle of fruit punch that has 200 kcal and no fat and no protein?

      A. 50 g
      B. 80 g
      C. 800 g
      D. 0.02 g
      E. 5 g

#4 Which of the following involves a change of state?

      A. Melting ice
      B. Freezing water
      C. Vaporization of alcohol
      D. All of the above
      E. None of the above

#5 Which of the following is an example of kinetic energy?

      A. A roller coaster car at the top of a hill
      B. Water stored in a reservoir
      C. Burning wood
      D. An apple
      E. An unopened soda bottle

#6 Which amount of heat is released when 35.0 g of steam is converted to liquid at 100.0° C?

      A. 540 kcal
      B. 0.0648 kcal
      C. 18,900 kcal
      D. 18.9 kcal
      E. 5.4 kcal

#7 How do you find the mass number of an atom?

      A. Add up the number of protons, electrons, and neutrons in the atom.
      B Add up the number of protons and neutrons in the atom.
      C. It is equal to the number of protons in the atom.
      D. It is equal to the number of neutrons in the atom.
      E. Find the net electrical charge of the atom.

#8 Which of the following is not an example of a pure substance?

      A. NaCl
      B. Water
      C. Black coffee
      D. Aluminum foil
      E. Oxygen

#9 Which of the following statements about the periodic table is correct?

      A. A group is a horizontal row on the periodic table.
      B. A period is a column on the periodic table.
      C. The elements in each group have similar chemical properties.
      D. The B groups contain the representative elements.
      E. The A groups contain the transition elements.

#10 An isotope of chlorine has a mass number of 37. How many neutrons are present in this isotope?

      A. 11
      B. 17
      C. 20
      D. 37
      E. 54

#11

You are watching the sun rise while standing on the beach in North Carolina. The world looks flat. However, you know that that cannot be true. Propose a way to use the scientific method to prove that Earth is round instead of flat. Address all four steps of the scientific method:

#1 Control subjects in a double blind test of a new drug are

      A informed of what drug they are getting.
      B informed of what drug they are getting, but their private physicians are not.
      C given larger doses of the drug.
      D stricken with a different disease than the experimental subjects.
      E not given the experimental drug but are otherwise treated the same as the experimental subjects.

Explanation / Answer

4) D

5) A

7) B

mass number = protons + neutrons

8) C

Black coffee is a composition. So, it is not a pure compound.

9) C

C. The elements in each group have similar chemical properties.

10) C = 20

netrons = mass number - atomic number

= 37-17

= 20

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