Chapter 6 Review

1) In space, light travels at a speed of about 300,000,000 m/s. Which expresses that speed correctly in scientific notation?

• 300,000 km/s
• 3 x 10^9 m/s
• 3 x 10^8 m/s
• 3 x 10^7 m/s

Tags

NGSS.HS-PS4-1

2) A star is 9 x 10^12 meters from Earth. What is that number in expanded form?

• 900,000,000,000 m
• 9,000,000,000,000 m
• 90,000,000,000,000 m
• 9.0 x 10^12 m

3) After six months, an astronomer notices that star A moves a greater distance than star B. Which conclusion is correct?

• Star A is closer than star B.
• Star A and star B are equally far away.
• Star A is farther away than star B.
• More observations are necessary to determine which star is farther away.

Tags

NGSS.MS-ESS1-3

4) A star looks like it's located one place in the sky in January and a different place in June. What is this phenomenon called?

• a light-year
• parallax
• refraction
• scientific notation

Tags

NGSS.MS-ESS1-1

5) ___________________________ uses powers of ten to write very large or very small numbers in shorter form.

6) The __________________________ is made up of all of space and everything in it.

7) A light-year is a measure of ______________________.

8) Astronomers use ______________________ to measure the distance to stars that are within several hundred light-years of Earth.

9) The distance light travels through space in a year is one ____________________________.

10) Parallax is the apparent change of _____________________ of an object when you look at it from different places.