Podcast
Questions and Answers
What was the first living thing on Earth?
What was the first living thing on Earth?
- Bacteria (correct)
- Mammals
- Amphibians
- Fish
Approximately how long ago did the dinosaurs go extinct?
Approximately how long ago did the dinosaurs go extinct?
- 13.6 billion years ago
- 4.6 billion years ago
- 65 million years ago (correct)
- 5 billion years ago
What is the estimated age of the universe?
What is the estimated age of the universe?
- 5 billion years
- 4.6 billion years
- 13.6 billion years (correct)
- 65 million years
Which of these organisms evolved after the extinction of the dinosaurs?
Which of these organisms evolved after the extinction of the dinosaurs?
Which of these statements is false?
Which of these statements is false?
Flashcards
Age of the Universe
Age of the Universe
Estimated to be between 13-16 billion years old.
Age of the Sun
Age of the Sun
The Sun is approximately 5 billion years old.
Age of the Earth
Age of the Earth
The Earth is about 4.6 billion years old.
Descent with Modification
Descent with Modification
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Order of Evolution
Order of Evolution
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Study Notes
Age of the Universe, Sun, and Earth
- Universe = 13.6 billion years old
- Sun = 5 billion years old
- Earth = 4.6 billion years old
Order of Evolution
- Primordial Soup: Oceans of organic material (no oxygen) gave rise to amino acids
- Bacteria (3.5 bya): First living thing; began producing oxygen through photosynthesis
- Multicellular Organisms: Simple organisms grouped together
- Invertebrates: Jellyfish, crustaceans, insects, slugs, worms.
- Fish
- Amphibians: Frogs, salamanders
- Reptiles: Dinosaurs (went extinct 65 million years ago)
- Birds
- Mammals
- Mankind (2 million years ago):
- Oldest written record ≈ 6000 years or less
- Modern humans existed for 100,000-200,000 years
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