Here are samples of questions asked at different grade levels in
Undated (AP) _ Here are samples of questions asked at different grade levels in the Second IEA Science Study, and the percentage of U.S. students answering them correctly, where comparable data was available:
- Flowers cannot usually produce seeds unless
A-they are visited by insects.
B-they appear in the summer
C-they are on plants growing in good soil
D-they produce nectar.
E-suitable pollen is placed on their stigmas.
Correct answer: E, answered correctly by 28.5 percent in 1986, 33.3 percent in 1983, and 32.5 in 1970.
- When 2 grams of zinc and 1 gram of sulfur are heated together, practically no zinc or sulfur remains after the compound zinc sulfide is formed. What happens if 2 grams of zinc are heated with 2 grams of sulfur?
A-Zinc sulfide containing approximately twice as much sulfur is formed.
B-Approximately 1 gram of sulfur will be left over.
C-Approximately 1 gram of zinc will be left over.
D-Approximately 1 gram of of each will be left over.
E-No reaction will occur.
Correct answer: B, answered correctly by 29.2 percent in 1986, 35.6 percent in 1983, and 33.1 percent in 1970.
A mixture of powdered iron and sulfur is heated. What will be formed?
A-a single element
B-two other elements
Correct answer: E, answered correctly by 70.2 percent in 1986, no comparable data for previous years.
A stone is thrown upward at an angle of 45 degrees. At the highest point reached by the stone, which one of the following is true?
A-Acceleration is zero.
B-Acceleration is at a minimum, but not zero.
C-Total energy is at a maximum.
D-Potential energy is at a minimum.
E-Kinetic energy is at a minimum.
Correct answer: E, answered correctly by 54.3 percent in 1986, no comparable data for previous years.