Practical Science and Experimental Skills

Grade 10 Science — Practical Science and Experimental Skills: 25 practice questions with instant scoring and explanations.

1. In a chemistry lab, the most important safety measure is:
2. Distillation is used to:
3. Crystallization is a technique to:
4. Flame test is used to identify:
5. In a flame test, sodium produces a:
6. Gas test for CO₂ uses:
7. Limewater turns milky because:
8. Gas test for hydrogen uses:
9. Test for chlorine gas uses:
10. In microscopy, the eyepiece (ocular) and objective lens together determine:
11. If eyepiece magnification is 10× and objective is 40×, total magnification is:
12. When observing cells under microscope, to avoid damage, start with:
13. In an electrical circuit experiment, an ammeter is connected in:
14. A voltmeter is connected in:
15. Control variables in an experiment are:
16. The independent variable is:
17. The dependent variable is:
18. Graph axes should be labeled with:
19. Linear graphs show:
20. The slope of a graph represents:
21. Accuracy in measurements refers to:
22. Precision in measurements refers to:
23. Significant figures in 0.0045 L are:
24. Calibration of instruments is important because it:
25. When recording observations in a science experiment, data must be: