SI units, prefixes and converting with unit analysis

Answer Key - Grade 10 Science Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   A grain of rice has a mass of 0.025 g. How many milligrams is that, Esme?

   25 mg

2. Read this first

   SI prefixes (NIST)

   prefix	symbol	factor
   kilo	k	10³
   centi	c	10⁻²
   milli	m	10⁻³
   micro	μ	10⁻⁶
   nano	n	10⁻⁹

3. 2.

   Using the table, how many millimeters are in 1 meter, Jun?

   • 100
   • 1,000,000
   • 1000
4. 3.

   Using the table, what factor does the prefix micro (μ) stand for, Kira?

   • 10⁻³
   • 10⁻⁶
   • 10⁶
5. 4.

   Using the table, how many grams are in 1 kilogram, Luz?

   • 100
   • 1000
   • 10
6. 5.

   What is the SI base unit of mass, Milo?

   • The kilogram
   • The gram
   • The pound
7. 6.

   What is the SI base unit of temperature, Noah?

   • The degree Celsius
   • The kelvin
   • The degree Fahrenheit
8. 7.

   Which SI base unit measures amount of substance, Pia?

   • The mole
   • The liter
   • The newton
9. 8.

   Which unit suits the length of a pencil, Ren?

   • Nanometers
   • Kilometers
   • Centimeters
10. 9.

    Which unit suits the volume of one drop of milk, Tala?

    • Cubic meters
    • Milliliters
    • Kiloliters
11. 10.

    Which unit suits the wavelength of visible light, Zee?

    • Meters
    • Nanometers
    • Kilometers