Chemistry
Test Questions
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Chemistry
Test Questions
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| Below are sample questions from the Third International Mathematics and Science Study (TIMSS) achievement tests in Science administered to twenty-six countries. TIMSS is a research project sponsored by the International Association for the Evaluation of Educational Achievement (IEA). These questions may be used in the classroom, as a tool for evaluation, or to provide examples of test-question writing. | ||
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| Grades 7and 8 | ||
| 1. The words cloth, thread, and fiber can be used in the following sentence: cloth consists of threads which are made of fiber. Use the words molecules, atoms, and cells to complete the following sentence: | ||
| _____________ consists of _______________ which are made of ________________. | ||
| Answer: Cells-Molecules-Atoms. | ||
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| 2. Which is an example of a chemical reaction? | ||
| A. The melting of ice | ||
| B. The grinding of salt crystals to powder. | ||
| C. The burning of wood. | ||
| D. The evaporation of water from a puddle. | ||
| Answer: C | ||
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| 3. Animals are made up of many atoms. What happens to the atoms after an animal has died? | ||
| A. The atoms stop moving. | ||
| B. The atoms recycle back into the environment. | ||
| C. The atoms split into simpler parts and then combine to form other atoms. | ||
| D. The atoms no longer exist once the animal has decomposed. | ||
| Answer: B | ||
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| 4. Which gas could cause a glowing splint to burst into flame? | ||
| A. Neon | ||
| B. Oxygen | ||
| C. Nitrogen | ||
| D. Carbon dioxide | ||
| Answer: B | ||
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| 5. Which of the following is NOT a mixture? | ||
| A. Air | ||
| B. Blood | ||
| C. Orange juice | ||
| D. Salt | ||
| Answer: D | ||
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| 6. When oil is burning, the reaction will | ||
| A. only release energy | ||
| B. only absorb energy | ||
| C. neither absorb nor release energy | ||
| D. sometimes release and sometimes absorg energy depending on the oil | ||
| Answer: A | ||
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| 7. Which is a chemical change? | ||
| A. Element 1 is hammered into a thin sheet. | ||
| B. Element 2 is heated and turns to a liquid. | ||
| C. Element 3 turns a greenish color as it sits in air. | ||
| D. Element 4 is ground up into a fine, slippery powder. | ||
| Answer: C | ||
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| 8. If a neutral atom loses an electron, what is formed? | ||
| A. A gas | ||
| B. An ion | ||
| C. An acid | ||
| D. A molecule | ||
| Answer: B | ||
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| 9. A mixture of powdered iron and sulfur is heated. What will be formed? | ||
| A. a single element | ||
| B. two other elements | ||
| C. a solution | ||
| D. an alloy | ||
| E. a compound | ||
| Answer: E | ||
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| 10. Which is NOT an example of a chemical change? | ||
| A. Boiling water | ||
| B. Rusting iron | ||
| C. Burning wood | ||
| D. Baking bread | ||
| Answer: A | ||
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| 11. Carbon dioxide is the active material in some fire extinguishers. How does carbon dioxide extinguish a fire? | ||
| Answer: Should include that carbon dioxide keeps oxygen away, response should include a specific reference to oxygen. | ||
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| 12. It takes 10 painters 2 years to paint a steel bridge from one end to the other. The paint that is used lasts about 2 years, so when the painters have finished painting at one end of the bridge, they go back to the other end and start painting again. | ||
| a. Why MUST steel bridges be painted? | ||
| b. A new paint that lasts 4 years has been developed and costs the same as the old paint. Describe 2 consequences of using the new paint. | ||
| Answer: a. Must include that the bridge should be painted to avoid corrosion. | ||
| Answer: b. Must include that the new paint will be cheaper for the community. | ||