Unit 1: Where are we in the Universe? Part 1

The wavelength of red light is 0.000000625m. What is this length written in standard form (scientific notation)?

• 6.25x10^-7

• 6.25x10⁷

• 625x10⁹

• 0.625x10⁶

The diameter of The Sun is 1,392,000,000m. What is the diameter in standard form (scientific notation)?

• 1.392x10⁹

• 1.392x10^-9

• 1,392x10⁶

• 0.1392x10¹⁰

What is the product of 1.2x10³ x 3.0x10⁶ =

• 4.0x10⁹

• 3.6x10⁹

• 3.6x10^-3

• 4.0x10^-3

• 2.3x10⁴

• 9.2x10⁰

• 2.3x10^-4

• 9.2x10^-4

A bag of apples weighs 2.5kg. What does the k mean in kg?

• x10

• x100

• x1000

• x10,000

A typical 1,000 megawatt nuclear facility in the United States needs a little more than 1 square mile to operate. How much is 1 megawatt?

• 1 watt

• 1,000 watts

• 1,000,000,000 watts

• 1,000,000 watts

Radio waves have the longest wavelengths in the electromagnetic spectrum. These waves can range from 1 millimeter to greater than 100 meters. What does the prefix milli- stand for?

• 10^-1

• 10^-2

• 10^-3

• 10^-4

Violet light has a wavelength of 380 nm (nanometers). How much is 1 nm in standard form (scientific notation)?

• 1x10^-3

• 1x10^-6

• 1x10^-9

• 1x10^-12

Which of the following are fundamental particles? (check all of the correct answers)

• quark

• proton

• neutron

• electron

A (a)   particle is one which cannot be split up into smaller parts