1. In a fair test, which factor is changed on purpose?, A. Result, B. Kept factor, C. Changed factor, 2. Which factor is observed or measured as the result of a test?, A. Control, B. Measured factor, C. Changed condition, 3. Which action helps make a test fair?, A. Keep other factors the same., B. Change several factors together., C. Measure a different result in each trial., 4. A class tests how light affects plant growth. Which plan changes only one factor?, A. Use two pots., B. Change light and soil., C. Change only the hours of light., 5. Why should an investigation include at least three trials?, A. For fun., B. To use more tools., To make the result more reliable and less likely due to chance., 6. Which is the best way to make an accurate data table?, A. Record each measurement with its unit., B. Write only the best result after all trials., C. Replace unusual results with estimated numbers., 7. Equal-sized sheets of different paper-towel brands are tested with the same amount of water. What is the changed factor?, A. Time, B. Towel brand, C. Water volume, D. Sheet size and water, 8. Mia compares seed germination. Which action would make the test unfair?, A. Use the same seeds., B. Give equal amounts of water., C. Change only the amount of light., D. Use different seed kinds and different amounts of water., 9. Leo compares two soaps but changes both the soap and the water temperature. Which evaluation is best?, A. Revise it: change only one factor., B. Accept it because two factors provide more information., C. Accept it if the result agrees with the original prediction., D. Revise it by also changing washing time and the amount of dirt., 10. Which is the best complete plan for comparing two fertilizers?, A. Test two plants., B. Use three similar plants per fertilizer, keep soil, water, and light the same, then measure growth weekly., C. Use one plant per fertilizer, change pot size and water too, then report only the tallest plant after one week., D. Use several unrelated plants, place each in a different location, change watering schedules, and record growth

SCIENCE 6

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