Quiz #1
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Why do we use only the metric system in science?
If everyone had their own measuring system, it would be very hard to communicate sizes or how far or fast something went
Metric units acronym
King Henry Died by Drinking Chocolate Milk - Kilo, Hecto, Deka, base unit, Deci, Centi, Milli
How do you convert between metric units?
• Move to the right to get smaller, left to get bigger • Move the decimal point the amount of letters between the two units, including the unit you’re converting to but not the one you’re converting from (ex. 50 km = 5,000,000 cm - KhdbdCm)
How do you differentiate deka and deci?
• Deka - “da” • Deci - “d”
Who first developed the metric system and when?
France in the 1750s
What version of the metric system do scientists use today?
International System of Units (SI)
Why are SI units easy to use?
• Base 10, easy to convert • Almost everyone uses it, easy to communicate
What unit would you use to measure the height of a flagpole?
Meters
What unit would you use to measure the length of a strand of spaghetti?
Centimeters
How do you use a triple beam balance?
• Move the 100 gram slider 1st, until the pointer falls below 0, then move it back so the pointer’s above 0 • Repeat for the10s and the 1s until the pointer is on the line • Add the numbers together to get the weight
Read from the _____ of the meniscus
Bottom
How do you find volume by displacement?
Subtract the final volume from the original after adding an irregularly shaped object (ex. a marble)
What are the mass base units?
grams
What are the volume base units?
Liters
What are the length base units?
meters