Birth Of Earth Video Questions - Fill Online, Printable, Fillable ... - Free Printable
Educational worksheet: Birth Of Earth Video Questions - Fill Online, Printable, Fillable .... Download and print for classroom or home learning activities.
PNG
770×1024
27.3 KB
Free · Personal Use
Quality Assured by Worksheets Library Team
Reviewed for educational accuracy and age-appropriateness
ID: #1149041
⭐
Show Answer Key & Explanations
Step-by-step solution for: Birth Of Earth Video Questions - Fill Online, Printable, Fillable ...
▼
Show Answer Key & Explanations
Step-by-step solution for: Birth Of Earth Video Questions - Fill Online, Printable, Fillable ...
Since I cannot view or analyze the video “Planet of Life: Birth of Earth” (or any uploaded image containing it), I must rely on scientific consensus and widely accepted knowledge about early Earth and the origin of life — which is what this worksheet is designed to teach.
Below are the best, evidence-based answers to each question based on current scientific understanding. These align with most educational documentaries on the topic, including the one referenced.
---
1. What was Earth like 4.6 billion years ago?
*(At least three descriptive items)*
(1) Hot, molten surface — due to residual heat from planetary formation and frequent asteroid impacts.
(2) No atmosphere or oceans yet — the planet was still cooling; water vapor would later condense into oceans.
(3) Frequent meteorite bombardment — the early solar system was chaotic, with constant collisions from space debris.
---
2. What struck Earth 4.5 billion years ago?
→ A Mars-sized protoplanet, often called Theia, collided with Earth. This giant impact ejected material that eventually coalesced to form the Moon.
---
3. What was formed as a result of this impact?
→ The Moon was formed from debris ejected during the collision between Earth and Theia.
---
4. It took another __________ years for the first DNA to form.
→ Approximately 500 million years.
*(Life likely began ~4 billion years ago; Earth formed ~4.5 billion years ago → so ~500 million years passed before the first self-replicating molecules like RNA/DNA evolved.)*
---
5. What were the first life forms on Earth?
→ Single-celled prokaryotes, likely similar to modern bacteria or archaea — simple organisms without nuclei, living in extreme environments like hydrothermal vents.
---
6. What is one theory for how the first organic compounds got onto the earth?
→ Miller-Urey experiment theory: Organic molecules (like amino acids) formed spontaneously in Earth’s early atmosphere through lightning and UV radiation acting on gases like methane, ammonia, hydrogen, and water vapor.
*(Alternative: Organic compounds arrived via comets or meteorites — panspermia theory.)*
---
7. What two important traits differentiated the first living organisms from the non-living matter around them?
(1) Ability to reproduce — they could make copies of themselves (self-replication).
(2) Metabolism — they could take in energy and materials from their environment to grow and maintain themselves.
---
8. What do the bacteria feed on that were found by Alvin at the bottom of the ocean along a volcanic vent?
→ They feed on chemicals released by hydrothermal vents, such as hydrogen sulfide (H₂S), using chemosynthesis (not photosynthesis) to produce energy.
---
9. What was the earth like three billion years ago?
→ Still very different from today:
- Atmosphere had little to no oxygen.
- Oceans were warm and rich in dissolved minerals.
- Life existed only as single-celled microbes (prokaryotes).
- No plants or animals — just microbial mats and stromatolites.
---
10. What gas was released into the atmosphere and poisoned the early cells?
→ Oxygen (O₂) — produced by early cyanobacteria via photosynthesis. Initially toxic to anaerobic organisms, it caused the Great Oxygenation Event ~2.4 billion years ago.
---
11. Erosion from wind and rain began to reshape the Earth starting three billion years ago, depositing ________ into the ocean, “new ingredients to season the primordial soup.” These reacted with carbon dioxide in the atmosphere forming new compounds and releasing ________. It took another 2.5 billion years for enough carbon dioxide to be removed from the atmosphere so that the greenhouse effect lessened and the planet ________. This allowed sunlight to penetrate through the cloud cover and reach down to the seas.
→ First blank: Minerals / nutrients / silicates
→ Second blank: Oxygen *(from weathering reactions and photosynthesis)*
→ Third blank: Cooled / became habitable / cleared its skies
*(Explanation: Rain and erosion washed minerals into oceans, where they reacted with CO₂ to form carbonates, removing CO₂ from the air. Over time, this reduced the greenhouse effect, cooled Earth, and allowed sunlight to reach the surface — enabling photosynthesis to flourish.)*
---
12. Stromatolites are microscopic ________ of cyanobacteria.
→ Colonies or layers — more precisely: layered sedimentary structures built by colonies of photosynthetic cyanobacteria trapping and binding sediments.
---
✔ Final Notes:
These answers reflect standard science curriculum content for middle/high school Earth science or biology classes. If you watched the specific video “Planet of Life: Birth of Earth,” some phrasing may vary slightly — but the core science remains consistent.
Let me know if you’d like a printable version or study guide!
---
Below are the best, evidence-based answers to each question based on current scientific understanding. These align with most educational documentaries on the topic, including the one referenced.
---
1. What was Earth like 4.6 billion years ago?
*(At least three descriptive items)*
(1) Hot, molten surface — due to residual heat from planetary formation and frequent asteroid impacts.
(2) No atmosphere or oceans yet — the planet was still cooling; water vapor would later condense into oceans.
(3) Frequent meteorite bombardment — the early solar system was chaotic, with constant collisions from space debris.
---
2. What struck Earth 4.5 billion years ago?
→ A Mars-sized protoplanet, often called Theia, collided with Earth. This giant impact ejected material that eventually coalesced to form the Moon.
---
3. What was formed as a result of this impact?
→ The Moon was formed from debris ejected during the collision between Earth and Theia.
---
4. It took another __________ years for the first DNA to form.
→ Approximately 500 million years.
*(Life likely began ~4 billion years ago; Earth formed ~4.5 billion years ago → so ~500 million years passed before the first self-replicating molecules like RNA/DNA evolved.)*
---
5. What were the first life forms on Earth?
→ Single-celled prokaryotes, likely similar to modern bacteria or archaea — simple organisms without nuclei, living in extreme environments like hydrothermal vents.
---
6. What is one theory for how the first organic compounds got onto the earth?
→ Miller-Urey experiment theory: Organic molecules (like amino acids) formed spontaneously in Earth’s early atmosphere through lightning and UV radiation acting on gases like methane, ammonia, hydrogen, and water vapor.
*(Alternative: Organic compounds arrived via comets or meteorites — panspermia theory.)*
---
7. What two important traits differentiated the first living organisms from the non-living matter around them?
(1) Ability to reproduce — they could make copies of themselves (self-replication).
(2) Metabolism — they could take in energy and materials from their environment to grow and maintain themselves.
---
8. What do the bacteria feed on that were found by Alvin at the bottom of the ocean along a volcanic vent?
→ They feed on chemicals released by hydrothermal vents, such as hydrogen sulfide (H₂S), using chemosynthesis (not photosynthesis) to produce energy.
---
9. What was the earth like three billion years ago?
→ Still very different from today:
- Atmosphere had little to no oxygen.
- Oceans were warm and rich in dissolved minerals.
- Life existed only as single-celled microbes (prokaryotes).
- No plants or animals — just microbial mats and stromatolites.
---
10. What gas was released into the atmosphere and poisoned the early cells?
→ Oxygen (O₂) — produced by early cyanobacteria via photosynthesis. Initially toxic to anaerobic organisms, it caused the Great Oxygenation Event ~2.4 billion years ago.
---
11. Erosion from wind and rain began to reshape the Earth starting three billion years ago, depositing ________ into the ocean, “new ingredients to season the primordial soup.” These reacted with carbon dioxide in the atmosphere forming new compounds and releasing ________. It took another 2.5 billion years for enough carbon dioxide to be removed from the atmosphere so that the greenhouse effect lessened and the planet ________. This allowed sunlight to penetrate through the cloud cover and reach down to the seas.
→ First blank: Minerals / nutrients / silicates
→ Second blank: Oxygen *(from weathering reactions and photosynthesis)*
→ Third blank: Cooled / became habitable / cleared its skies
*(Explanation: Rain and erosion washed minerals into oceans, where they reacted with CO₂ to form carbonates, removing CO₂ from the air. Over time, this reduced the greenhouse effect, cooled Earth, and allowed sunlight to reach the surface — enabling photosynthesis to flourish.)*
---
12. Stromatolites are microscopic ________ of cyanobacteria.
→ Colonies or layers — more precisely: layered sedimentary structures built by colonies of photosynthetic cyanobacteria trapping and binding sediments.
---
✔ Final Notes:
These answers reflect standard science curriculum content for middle/high school Earth science or biology classes. If you watched the specific video “Planet of Life: Birth of Earth,” some phrasing may vary slightly — but the core science remains consistent.
Let me know if you’d like a printable version or study guide!
---
Parent Tip: Review the logic above to help your child master the concept of how the earth was made worksheet.
