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Questions and Answers
What is the total number of millimeters in 8 meters?
Which of the following is the SI unit for measuring temperature?
How many seconds are there in one day?
What is the relationship between kilometers and meters?
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If a thermometer measures temperature in Fahrenheit, what is the equivalent of 32°F in Celsius?
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Which conversion is correct concerning time measurement?
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What is the correct conversion for centimeters to millimeters?
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Which of these methods is correct for measuring time?
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Which unit would you use for measuring a distance of 500 meters?
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What is the converted time duration of 2 days in hours?
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Study Notes
Measurement Overview
- Measurement determines the magnitude of a quantity against an agreed standard.
- Indigenous and modern methods exist for measurement practices.
Indigenous Methods of Measurement
- Practices have been localized and passed through generations.
- Focuses on measuring length, mass, and time.
Length Measurement
- Length measures the distance between two points.
- Indigenous units of length in Ethiopia include:
- Hand-span: Distance from the tip of the little finger to the thumb tip.
- Digit: Width of an adult fingertip.
- Cubit: Distance from elbow tip to middle finger tip when extended.
- Foot: Distance from heel to big toe tip.
- Pace: Distance of one normal walking step.
- Arm Span: Distance from fingertip of one hand to the other when arms are stretched.
Mass Measurement
- Local mass measurement tools include:
- Quntal: Equivalent to 100 kilograms, used for grains.
- Feresula: Measures pepper and coffee, equivalent to 17 kilograms.
Time Measurement
- Time is the measure of an interval's duration.
- Indigenous method uses the shadow of a tree to tell time based on the Sun's position.
- Historical time measuring devices:
- Sundial, Sand Clock, and Water Clock.
Volume Measurement
- Volume measures the space an object occupies.
- Common tools in Addis Ababa markets for measuring volume:
- Jog: Plastic cup for liquids.
- Tassa: Can for cereals and liquids.
- Sini: Ceramic cup for coffee and spices.
- Birchiko: Glass for measuring various items.
SI Units and Conversions
-
Length: SI unit is meter (m).
- Conversions:
- 1 km = 1000 m
- 1 m = 100 cm
- 1 cm = 10 mm
- Conversions:
-
Time: SI unit is second (s).
- Time conversions:
- 1 hour = 60 minutes = 3600 seconds
- 1 day = 24 hours
- 1 week = 7 days
- 1 year = 365 or 366 days
- Time conversions:
Temperature Measurement
- Devices used: Thermometers (analog or digital).
- SI unit of temperature is Kelvin; other units include °C and °F.
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Description
This quiz explores the various methods of measurement as discussed in the Grade 8 General Science textbook. Students will learn to differentiate between indigenous and modern measurement techniques and their applications. Get ready to test your understanding of measuring quantities accurately!
