Beginnings of our Universe
Matter in the Universe
100
In science, we call this a thorough explanation that is supported by facts.
What is a scientific theory?
100
True or false:
Matter cannot be created for destroyed.
TRUE!
200
These are some challenges faced by astronomers when studying celestial events.
What are:
- events are very far away (stars, other solar systems/galaxies)
- events happened a long time ago
These things make astronomy hard to study!
200
These are the smallest whole units of matter.
What are atoms?
300
This theory explains the origins of our universe.
What is the Big Bang theory?
300
This state of matter is the most common in the universe.
What is plasma?
400
According to the most widely accepted theory, the universe is this many years old.
What is 13.8 billion years old?
400
These are the names of the 3 subatomic particles.
What are:
- Protons
- Neutrons
- Electrons
500
These 3 specific pieces of evidence support our current understanding of the beginnings of our universe.
What are:
- Cosmic microwave background radiation
- Redshift of galaxies (they are moving away from each other; universe is expanding)
- Abundance of light elements
500
This is the main difference between mass and weight.
What is
- mass is constant
- weight varies with gravity
600
This is the concept of "a singularity" in the theory of the birth of the universe.
What is a point of infinite density and temperature (conventional physics did not apply)
600
The very early universe consisted of only this.
What are:
- subatomic particles
- simplest atoms of periodic table: Hydrogen & Helium (makes up over 99% of the universe!)
