OLN.B Quiz

To take the quiz, click on the best answer for each question. You’ll need to finish the quiz with at least an 80% score to move on to Play a Game (which is optional), or to mark the Lesson complete and move on to the next.

Once you’ve passed the quiz, choose the button to play a game, or mark this page complete and go back to the Lesson to find the link to the next material. Don’t worry if you don’t pass the first time – you can take the quiz over again, and you can go back to the Lesson to re-read or double check anything you aren’t sure of before you do.

OLN.B Quiz
What are the main elements of the Earth’s core?
Which color is NOT used to describe Earth in the quote at the top of the lesson?
Which layer is made of hot magma and other semi-solid rocks and minerals?
When was the RemoveDebris Spacecraft launched?
What is the outermost layer of Earth called?
How big are the pieces of space junk that NASA is tracking?
How many pieces of space junk is NASA tracking?
How fast is space debris traveling?
What is the most common element in Earth’s atmosphere?
Who was the first human in space?