Outer space

High school (ages 12+)
Space & Astronomy

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/outer-space

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the physiological effects of microgravity?Microgravity in space leads to muscle atrophy and bone loss in humans
2. Why is space called a vacuum?Because it has fewer than one hydrogen atom per cubic meter, so there is almost nothing there to feel or see.
3. Where does space start?The boundary is called the Kármán line, about 100 kilometers (62 miles) above sea level. Crossing that line means you are in outer space.

Interstellar Medium: The matter and radiation that exist in the space between stars within a galaxy.
Intergalactic Medium: The diffuse plasma and matter that exists in the vast regions between galaxies.
Kármán Line: An internationally recognized altitude of 100 km above Earth's surface, defining the conventional boundary of outer space.
Vacuum: A space devoid of matter, characterized by extremely low particle density and pressure.