WorksheetsWhat Do You Remember About Thresholds 2 and 3?
Total questions: 10
Worksheet time: 5mins
What is the main distinguishing characteristic (or detail that stands out the most) of threshold 2?
Stars get old and start to die.
Stars begin to appear and light up the universe.
Helium and hydrogen are created.
Gravity and electromagnetism appears.
Choose all the factors that help create stars.
Gravity pulls dust clouds, hydrogen, and helium together.
Temperatures in the dust clouds start to increase a lot!
High temperature in the dust clouds leads to nuclear fusion.
All of the above.
Choose the best answer: The trigger event for stars lighting up would be...
Gravity pulling things together.
The Big Bang
Nuclear fusion
The creation of hydrogen
What are the main distinguishing characteristics (or details that stands out the most) of threshold 3?
Stars getting old and dying.
Stars lighting up.
The Big Bang.
New chemical elements are formed.
Chemical elements are important because they...
make life more interesting.
come from stars.
are valuable (like gold and silver).
are the raw materials that are used to create everything else.
Carbon is an important element because it...
is flexible and helps create many other things such as carbon-based life forms and fossil fuels.
comes from aging and dying stars.
something useful.
helps create supernovas.
In order to create elements that are heavier than iron, we need what?
A supernova.
A lot of gravity.
Goldilocks conditions.
Hydrogen.
Which of the following definitions best describes the term "Goldilocks conditions"?
Ingredients
Things that are just right in order for something important to happen.
A story about a lucky girl and 3 deadly bears.
A major event where the universe can no longer change back.
Which of the following best describes the term "trigger event"?
Stars dying.
Just right conditions.
A big party.
An immediate event that causes something else to happen.
Why is the creation of new elements important to humans?
Everything we use comes from chemical elements.
Chemical elements have helped humans make big progress in history from the Iron Age to the Industrial Revolution.
Chemical elements may also be part of humanity's downfall (global warming and other environmental issues).
All of the above!
