Ch 1 Intro to Astronomy - Scale and History

What is the approximate diametre of the earth in km?

• 1280 km

• 12,800 km

• 128,000 km

• 1,280,000 km

Which of the astronomical objects listed is closest to earth?

• Mars

• the sun

• the moon

• Venus

The distance light travels in one year is called a(n) ______________.

• light year

• parsec

• megaparsec

• astronomical unit

What is the approximate distance from Earth to the Sun in km?

• 1 million km

• 93 million km

• 1 billion km

• 150 million km

Tags

NGSS.MS-ESS1-3

One astronomical unit is equivalent to __________________.

• the distance from Earth to the moon

• 1 million km

• the distance from Earth to the sun

• one megaparsec

Tags

NGSS.MS-ESS1-3

3X10⁸ m/s is a the speed of _____________.

• light

• sound

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Which of the following is larger than the Andromeda Galaxy (in diameter)?

• Alpha Centauri

• Ring Nebula

• Pleiades Star Cluster

• Antennae Galaxy

How would you write 0.0005 in scientific notation?

• 50 x 10^-5
• 5 x 10^-4
• 5 x 10^-3
• .5 x 10^-3

Express the following in standard notation:
8.025 x 10^-8

• 0.00000008025
• 0.000000008025
• 802,500,000

Which of the following numbers is the least (smallest)?

• 7 x 10⁸
• 7.1 x 10⁸
• 7 x 10⁹
• 7.1 x 10⁹