Show:
What are you making?
Where are we?
How did that happen?
What's going on?
When did that happen?
100
This began as a single point of energy which "exploded" and formed all of the forces and matter that we have today.
What is the universe?
100
This layer is solid. The most abundant chemicals are iron (Fe) and nickel (Ni).
What is the inner core?
100
How did the young Earth grow larger?
What is bombardment/collision with asteroids/meteors.
100
True or False: The Big Bang theory can't explain 90% of the source of gravity.
What is true?
100
Which came first, the first photochemical reactions between methane and ammonia or the escape of hydrogen into space?
Photochemical reactions
200
This forms from the condensation of gas clouds. They are unstable and collapse to form planets.
What is a star?
200
This layer is a semi-solid (solid but squishy and able to flow).
What is the mantle?
200
Why is the ocean salty? How did that stuff get there?
Dissolved minerals which got into the ocean through run-off and evaporation/deposition.
200
What two gases were the main components of Earth's early atmosphere? What is the main component of the Earth's atmosphere today?
What is methane and ammonia? nitrogen?
200
Which came first, the initial escape of hydrogen into the atmosphere or the decomposition of water vapor?
Initial escape of hydrogen
300
This is formed when gas clouds become ultra-dense and begin nuclear reactions.
What is a galaxy?
300
This layer is gaseous. The most abundant elements are hydrogen (H) and helium (He)
What is the thermosphere/exosphere?
300
How were the early oceans on Earth able to grow larger?
The planet cooled allowing water vapor to condense and rain.
300
What were the first two elements formed?
What are hydrogen and helium?
300
Which came first, the decomposition of water vapor or the appearance of photosynthetic organisms?
Decomposition of water vapor
400
Gas clouds contract to form a protostar. The protostar collapses forming this.
What is a solar system?
400
This gaseous layer is where meteors burn.
What is the mesosphere/ionosphere?
400
What two events formed the first oceans on Earth?
What are outgassing and bombardment by meteors/asteroids.
400
As the universe expanded, its temperature ___________.
What is decreased?
400
What effect did the appearance of photosynthetic organisms have on the oxygen and carbon dioxide levels in the atmosphere?
Decrease in amount of carbon dioxide, increase in the amount of oxygen
500
The collision of which two celestial bodies formed the moon?
What are Earth and Theia?
500
These layers have life present. One is solid and the other is gas. Identify the two layers and the corresponding state of matter (tell the layer and if it's solid or gas).
What are the crust (solid) and troposphere (gas).
500
How is the sun like other stars? How is it different?
Similarities: star, hot, mostly H and He Differences: temperature (some are cooler, some hotter), size, color (related to temperature)
500
What is one similarity between Earth and Venus? Earth and Mars?
Earth/Venus: terrestrial planets (have solid ground), gaseous atmosphere, gaseous carbon dioxide present. Earth/Mars: terrestrial planets, carbon dioxide present (as a gas on Earth and as a solid on Mars). *Differences: life present on Earth, Mars is colder than Earth, Venus is hotter than Earth, no water present on Venus, frozen water found on Mars
500
The last step in the formation of Earth's atmosphere was the leveling off of which two gases?
What are oxygen and carbon dioxide?