Birth of The Stars - Threshold 2

What is Big History?

• A modern scientific story of where we come from

• A religious story of how the Universe started

• The study of humans

What force causes a cloud of dust and gas to come together and form a star ?

• friction

• magnetism

• electromotive

• gravity

Stars form from huge clouds of gas and dust in space called :

• supernova

• nebula

• the Kuiper Belt

• the Oort Cloud

What factor determines how long a star will last ?

• it's mass

• it's composition

• neighboring stars

What is the predicted age of our solar system?

• 10 thousand years

• 10 million years

• 4.5 billion years

• 13.8 billion years

Which piece of evidence supports the Big Bang theory?

• Galaxies are staying in the same places

• Galaxies are moving away from us

• Galaxies are moving towards us

• Galaxies all orbit the center of the universe

What were the original two elements in our universe?

• Lithium and Carbon
• Hydrogen and Neon
• Helium and Chlorine
• Hydrogen and Helium

How is a theory different from a guess? Choose the best answer.

• A theory cannot be disproven; a guess can be

• A theory is backed up by hard evidence; a guess is not

• A theory is agreed upon by scientists; a guess is only agreed on by laypeople

• A theory is usually very old; a guess is usually very new

What is one major piece of evidence that the Big Bang theory is correct?

• Astronomers have detected leftover radiation from the Big Bang

• Everything in the universe has remained in the same location for billions of years

• Astronomers have discovered that the universe is no longer expanding

• Astronomers have discovered evidence that the universe will soon begin contracting in a "Big Crunch"

All stars begin their life as a

• Main Sequence

• Nebula

• Protostar

• Black Dwarf