Basics
Dynamic
something that has been constantly changing since it came to be
What is rate of change?
All events in earth science take time. ROC can be calculated to find comparisons and make conclusions about how long the change in that event took place.
Cold air rises, warm air sinks.
True or False?
False
Warm air rises and cold air sinks due to density differences (hot hair balloon)
What is The Big Bang?
The moment 13.8 billion years ago when the universe began as a tiny, dense, fireball that exploded.
What is a galaxy?
a collection of billions of stars
Name the 5 senses and tools you can use to enhance observations
Sight, hearing, taste, smell and touch
Scale, ruler, microscope, beaker, cylinder, timer
Is Earth a dynamic planet?
A uniform substance always has the same density.
True or False
True
What did the Big Bang cause?
Everything in the universe to move away from each other.
What is gravity?
The force that holds stars together.
What is graphing? What is it used for?
tool used to organize data and show relationships between variables
What are interpretations based on observations?
Inferences
What type of relationship do pressure and density have? (Direct or Indirect?)
Direct relationship, as pressure increases density increases.
The _______ and _______ prove that everything in the universe is expanding.
What is luminosity?
The brightness of a star compared to the brightness of the sun?
Direct Relationship
both variables either increase together or decrease together
True or False?
True
What type of relationship to temperature and density have? Direct or Indirect?
Indirect Relationship. As temperature increases, density decreases.
At what speed are galaxies moving away from each other?
extremely high speeds
What is our galaxy?
The Milky Way (a spiral galaxy)
one variable increased while the other decreases
What does the heliocentric model state?
The sun is the center of our solar system.
Which is more dense? Warm or cold?
Warm is less dense, cold is more dense.
What are two instances of proof of the Big Bang Theory?
The redshift of distance galaxies and cosmic background radiation.
What is nuclear fusion?
The process by which stars create energy. H+H>Helium