Taking Scientific Measurements Using a Ruler Flashcards
(10 cards)
What unit should be used when measuring length in science?
Millimeters (mm) or centimeters (cm) for small objects; meters (m) for larger distances.
How can you minimize errors when using a ruler?
Align the object with the zero mark, keep your eye level straight, and avoid parallax errors.
What is a parallax error?
A reading mistake caused by looking at a scale from an angle instead of straight on.
Why should you always use the smallest unit possible when measuring?
To improve accuracy and reduce rounding errors.
What is the correct way to measure an irregularly shaped object?
Use a flexible measuring tape or a string, then measure the string with a ruler.
Why is repeating a measurement multiple times important?
To ensure precision and check for consistent results.
How do you measure the thickness of a very thin object like paper?
Stack multiple sheets, measure the total thickness, and divide by the number of sheets.
What is the smallest division on a standard metric ruler?
1 millimeter (mm).
What is the best method to measure a curved line?
Use a thread or flexible ruler, trace the curve, and then measure the thread’s length.
How does using a digital caliper improve accuracy over a standard ruler?
It provides precise decimal readings and reduces human reading errors.
