Solved Questions on Measurements
1. How can you avoid parallax errors when measuring length with a scale?
a) Hold the scale at an angle to the object.
b) Look at the scale from below.
c) Ensure the eye is directly above the measurement point.
d) Use a broken scale for more accurate readings.
Answer: c) To avoid parallax errors when measuring length with a scale, it is important to ensure that the eye is directly above the measurement point. Parallax errors occur when the eye is not aligned with the scale and viewing angle, resulting in an inaccurate measurement.
2. Jake purchased a candy bar weighing 500 grams, while Amy purchased the same candy bar weighing 0.5 kilograms. Who has a greater amount of candy?
a) Jake
b) Amy
c) They have the same amount
d) It cannot be determined from the given information
Answer: c) To compare the amounts, we need to convert both measurements to the same unit. We know that 1 kilogram is equal to 1000 grams.
Jake has 500 grams of the candy bar, which is equivalent to 0.5 kilograms (500 grams / 1000 grams per kilogram = 0.5 kilograms).
Amy has 0.5 kilograms of candy bar.
Both Jake and Amy have the same amount of candy.
3. Which of the following statements accurately describes the measurement of an irregular area?
a) The area of an irregular shape cannot be measured at all.
b) The area of an irregular shape can be measured using graph paper.
c) The area of an irregular shape can only be estimated by guessing.
d) The area of an irregular shape is always equal to the area of a square.
Answer: b) When measuring the area of an irregular shape, one method is to use graph paper. The graph paper provides a grid with squares of known dimensions. By counting the number of squares covered by the irregular shape, an estimation of its area can be obtained.
4. Which of the following represents the correct conversion between units of time?
a) 1 day = 24 minutes
b) 1 year = 365 hours
c) 1 century = 100 years
d) 1 millennium = 1000 centuries
Answer: c) 1 decade = 10 years and 1 century = 10 decades. So,
1 century is equal to 100 years.
5. Match the following measurement units with their corresponding quantities.
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Column I
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Column II
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1. mg
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A) Area
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2. millenium
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B) Temperature
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3. Kelvin
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C) Time
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4. mm
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D) Mass
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5. km²
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E) Length
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a) 1:E, 2:C, 3:B, 4:D, 5:A
b) 1:A, 2:C, 3:B, 4:D, 5:E
c) 1:D, 2:C, 3:B, 4:E, 5:A
d) 1:B, 2:E, 3:A, 4:C, 5:D
Answer: c) mg: Mass
Millennium: Time
Kelvin: Temperature
mm: Length
km²: Area
FAQs
1. What are the fundamental measuring units, and how can we use them to measure things?
Simple measures may be quantified and communicated in standardized ways with the use of basic units, such as meters for length, grams for mass, and seconds for time.
2. How do we measure length, and what are some common tools used for it?
Measurements of length can be taken with tape measures, rulers, or even just by foot. These instruments help us in precisely measuring distance.
3. What is the difference between weight and mass in measurement?
Weight is the force of gravity acting on a thing, whereas mass is the amount of substance in it. Weight is expressed in newtons, whereas mass is expressed in grams or kilograms.
4. How do we measure volume, and what are common units for volume measurement?
Beakers and cylinders with graduated sides are two examples of containers used to measure volume. Depending on the quantity, litres and millilitres are common quantities.
5. How do we measure time, and what are the units used for time measurement?
Devices like stopwatches and clocks are used to measure time. The duration of events can be expressed in standardized ways using units, which include seconds, minutes, and hours.
