Q1
An instrument used to observe very small objects is a:
Amicroscope
Bthermometer
Cstopwatch
Dbeam balance
CBSEClass 8 (CBSE)ScienceCh 1 · Topic 2
Tools and Instruments in Science
Learning about common tools and instruments used in scientific investigation.
Core concept
Each instrument is designed for a specific type of measurement — a beam balance measures mass accurately, a stopwatch measures short time intervals, and a pH meter measures acidity or basicity precisely, more accurately than litmus paper alone. Proper use and calibration of instruments is essential, since an uncalibrated or misused instrument can give inaccurate readings, leading to incorrect conclusions in an investigation.
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• A microscope magnifies objects too small to see with the naked eye.
• Thermometers measure temperature; measuring cylinders measure liquid volume.
• Beam balances measure mass; stopwatches measure short time intervals.
• Proper calibration of instruments is essential for accurate results.