Measurements

Convert 920 mm to km.

• 920,000 km

• 0.000920 km

• 9.20 km

• 9,200 km

What is the basic unit of length?

• gram

• meter

• liter

• joule

Numbers that are reliable and absolutely necessary to indicate the quantity of something.

• Scientific notation

• Density

• Significant figures

How many significant figures? 5.670

• 1

• 3

• 2

• 4

How many significant figures will the answer have? 35.0/22.45

• 4

• 3

• 2

• 7

Density is equal to the mass of an object divided by the (a)   .

Used to make writing numbers more efficient by writing them in short form.

• Scientific notation

• Significant figures

• Density

Convert 0.0078 hg into cg.

• 78 cg

• 7.8 cg

• 0.078 cg

• 78,000 cg

If there is a decimal in the number, you should start counting from the (a)   in order to count the correct number of significant figures.

(a)   is the amount of mass in a given space.