G6 – 5.2 SI Units & Sig Fig Quiz

Why is it important to include units when writing a measurement?

• It makes the number look more professional

• Units provide context and meaning, ensuring clear communication

• Units are only important in science class

• It takes up more space on the page

Which of the following is the correct SI base unit for mass?

• Gram

• Kilogram

• Pound

• Newton

According to the notes, why do scientists use significant figures?

• To make calculations more difficult

• To represent the precision of a measurement

• To ensure all numbers are whole numbers

• To follow a rule that has no real purpose

Which measurement is more reliable and why: 2.0 cm or 2.000 cm?

• 2.0 cm, because it is simpler

• 2.000 cm, because it is more precise

• They are equally reliable

• 2.0 cm, because it has fewer zeros

How many significant figures are in the number 0.0701?

• 5

• 4

• 3

• 2

The SI unit for temperature is the:

• Celsius

• Fahrenheit

• Kelvin

• Mole

Which of the following is NOT an SI base unit?

• Meter

• Liter

• Second

• Ampere

All of the following numbers are significant EXCEPT:

• Nonzero digits

• Zeros between nonzero digits

• Zeros at the beginning of a number before the first nonzero digit

• Zeros at the end of a number after the decimal point

How many significant figures are in 0.00450?

• A) 2

• B) 3

• C) 4

• D) 5

Which of the following is an exact number?

• 12.4 g

• 25.0 mL

• 12 students in a class

• 3.14 seconds