Physics Practice: Form and Conversion

What is scientific notation and why is it used?

• Scientific notation is a method for measuring temperature.

• Scientific notation is a method of expressing numbers using powers of ten, used for simplifying calculations and representing very large or very small values.

• Scientific notation is used only for whole numbers.

• Scientific notation is a way to write fractions more easily.

Convert 5000 meters to kilometers.

• 500 meters

• 5,000 kilometers

• 50 kilometers

• 5 kilometers

If a mass is 2500 grams, what is its equivalent in kilograms?

• 0.25 kilograms

• 3.0 kilograms

• 2.5 kilograms

• 1.5 kilograms

How many seconds are there in 3 hours?

• 7200

• 5400

• 10800

• 3600

Express the number 0.00045 in scientific notation.

• 4.5 x 10^-4

• 0.45 x 10^-3

• 4.5 x 10^4

• 45 x 10^-5

Convert 1.5 kilometers to meters.

• 15 kilometers

• 1.5 meters

• 1500 meters

• 150 meters

If an object weighs 3.2 kilograms, how many grams does it weigh?

• 3200 grams

• 320 grams

• 3000 grams

• 3500 grams

How many minutes are in 120 seconds?

• 3 minutes

• 60 seconds

• 1 minute

• 2 minutes

Write 6.02 x 10^23 in standard form.

• 602000000000000000000

• 6.02 x 10^22

• 6020000000000000000000

• 602000000000000000000000

• 60200000000000000000

Convert 0.75 meters to centimeters.

• 80 centimeters

• 100 centimeters

• 70 centimeters

• 75 centimeters