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Big History Project
Course: Big History Project > Unit 4
Lesson 1: Earth & the Formation of Our Solar System | 4.0- ACTIVITY: Planet Card Sort
- WATCH: Unit 4 Overview
- ACTIVITY: Unit 4 Vocab Tracking
- WATCH: Threshold 4 — Earth & Solar System
- ACTIVITY: Threshold Card —Threshold 4 Earth & the Solar System
- WATCH: How Did Earth and the Solar System Form?
- READ: How Our Solar System Formed
- READ: The Rocket Scientist - Mary Golda Ross: Graphic Biography
- READ: Gallery — Earth & Solar System
- Quiz: Earth & the Formation of Our Solar System
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ACTIVITY: Threshold Card —Threshold 4 Earth & the Solar System
Each threshold follows a consistent pattern of creating greater complexity in the Universe. Download a PDF of Threshold 4 Earth & the Solar System.
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- Dose Jupiter have a core?(3 votes)
- yes. Jupiter dose have a core(2 votes)
- why is earth the only planet with oxygen(1 vote)
- Free molecular oxygen is a very reactive chemical. It isn't typically found in large amounts unless it is continuously produced. On Earth, life is one major process that is producing significant levels of free oxygen. That is also why it is looked for on other planets as an attempt to find other life.(3 votes)
- do gas planets have crust, mantle, core or just hydrogen and helium?(2 votes)
- Most likely just gas, but nobody knows for absolute sure(1 vote)
- 99% of material in a gas cloud goes into making a star and 0.1% into planets.
Is this because 99% of the material in a gas cloud is hydrogen and helium, which gravity draws into a star?(1 vote) - How did they figure out the pluto couldnt be seen And why?(1 vote)
- Pluto can be seen with a powerful enough telescope.(1 vote)
- is a onther earth going to form(1 vote)
- In this living, expanding universe, new planets are always in the process of forming somewhere or other. Whether any of them are habitable is another matter altogether.(1 vote)
- how did they find evidence on mars that there used to be running water(1 vote)
- also, near the poles, underground, there is evidence of liquid water flowing underneath the surface, from satellite imagery showing drifts of the martian soil.(2 votes)
- how many stars are in the milky way(0 votes)
- We don't know the exact number, but it's estimated there are between 100-400 billion stars in the Milky Way galaxy.(2 votes)
- nah yall alreyd at collage nah bruh(0 votes)
- How come Earth has so much more liquid water than any other planet?(0 votes)
- Goldilocks condition: Earth is not too hot or too cold, not too big or too little, not too near the Sun or too far away, but just right for life to flourish.
it is also theorized that Earth was hit by a large comet of ice.
David's explanations of how the planets are formed is making my understanding of the Big History clearer.(1 vote)