Day2, Unit 1 Conversion of Units in Astronomy

Open Ended

Do Now:

What are the two most frequently used units of measurement in astronomy? How does one relate to the other?

Let us practice using our reference tables...

Multiple Choice

How would you write 0.0005 in scientific notation?

• 50 x 10^-5

• 5 x 10^-4

• 5 x 10³

• .5 x 10³

Multiple Choice

Scientific Notation is made up of two number parts. The second part is a power 10.

• True

• False

Multiple Choice

Express the following in scientific notation:

.000457

• 457 x 10⁶

• 457 x 10^-6

• 4.57 x10⁴

• 4.57 x 10^-4

Multiple Choice

Convert to scientific notation:

520,000,000

• 52 x 10⁷

• 5.2 x 10^-7

• 5.2 x 10⁸

• 0.52 x 10⁹

Multiple Choice

1 kilometer is equal to______________.

• 100 m

• 100 000 cm

• 1000 cm

• 1 mile

Multiple Choice

1 hour is equal to ________ seconds

• 60

• 360

• 3600

• 180

Multiple Choice

A car weights 1.2 tons. How much is this in pounds? (1 lb= 0.454 kg) (1 ton=1000 kg)

• 3000 lb

• 2643.17 lb

• 2456.20 lb

• 544.8 lb

Work on the handout

Practice within your groups more conversions between units and Scientific Notation. Hand in before class ends or online.