Base units, Prefixes and Standard form

The measure of the amount of matter in an object is called:

• kilogram

• kg

• mass

• mole

• I don't know

What is the SI base unit symbol of time?

• second

• s

• min

• h

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The base unit for current in SI units is the:

• volt

• coulomb

• ampere

• ohm

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The SI base unit for mass is the

• ounce

• gram

• milligram

• kilogram

• I don't know

The prefix "micro" means

• x10^-6

• x10^-9

• x10^3

• x10^-3

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The prefic "nano" means:

• x 1 000

• 1/1 000

• x 1 000 000

• 1/1 000 000 000

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The prefix "mega" means:

• x 1 000 000

• 1/1 000

• 1/1 000 000

• x 1 000

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How many millimetres are in a kilometre?

• 1 000

• 100 000

• 1 000 000

• 1 000 000 000

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Which unit of mass is the smallest?

• milligram

• nanogram

• microgram

• picogram

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How would you write 564,000,000 in scientific notation?

• 5.64 x 10^-7

• 5.64 x 10⁶

• 5.64 x 10⁸

• 56.4 x 10⁷

• I don't know