Ch 13 - Our Home: Earth, a Unique Life Sustaining Planet8th Science
Solar System Planets Classification
How are the 8 major planets of our solar system broadly classified based on their size and physical composition?
How are the 8 major planets of our solar system broadly classified based on their size and physical composition?
Inner Planets (Mercury, Venus, Earth, Mars): Relatively small in size, dense, and mostly rocky in composition (terrestrial planets).
Outer Planets (Jupiter, Saturn, Uranus, Neptune): Very large planets mostly made of gases (hydrogen/helium) and ices.
Prism Memory Hook
Inner Rocks, Outer Gases.
Venus: The Hottest Planet
Even though Mercury is physically closer to the Sun, why is Venus the hottest planet in our solar system?
Even though Mercury is physically closer to the Sun, why is Venus the hottest planet in our solar system?
The Cause: Venus has an extremely thick, dense atmosphere made almost entirely of Carbon dioxide ().
The Mechanism: This thick gas layer creates a massive runaway greenhouse effect. It severely traps the Sun's incoming thermal radiation and prevents it from escaping back into space, pushing average surface temperatures to .
Prism Memory Hook
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The Martian Atmosphere
How does the atmosphere of Mars strictly compare to Earth's in terms of density and composition, making it hostile to human life?
How does the atmosphere of Mars strictly compare to Earth's in terms of density and composition, making it hostile to human life?
Density/Thickness: Mars's atmosphere is extremely tenuous, being about 100 times thinner than Earth's.
Composition: It is composed almost entirely of Carbon dioxide ().
Habitability Constraint: Because it is so thin and lacks oxygen, it cannot provide breathable air, cannot maintain sufficient pressure for stable surface liquid water, and offers extremely poor protection from incoming solar radiation.
Prism Memory Hook
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Also in this chapter
27 more cards to study in Prism
- 4ISRO's Mars Mission (MOM)
- 5The Goldilocks Zone
- 6The Ozone Molecule
- 7Importance of Earth's Exact Mass
- 8Origin of Earth's Magnetic Field
- 9The Magnetosphere Shield
- 10The Four Spheres of Earth
- 11The Delicate Life Layer
- 12Geodiversity
- 13Biological Role of Liquid Water
- 14Genes as Instruction Manuals
- 15Asexual Reproduction
- 16Asexual Reproduction Methods
- 17Vegetative Propagation Examples
- 18Gametes: The Special Cells
- 19Sexual Reproduction in Microbes
- 20Male and Female Gametes of a Flower
- 21Post-Fertilisation in Plants
- 22Fertilisation Environments
- 23Embryo Nutrition Strategies
- 24Genetic Variation & Adaptation
- 25The Paris Agreement Goal
- 26Plant Greenhouse vs. Planet Greenhouse
- 27Average Temperatures of Inner Planets
- 28The Triple Planetary Crisis
- 29Global Environmental Treaties
- 30False Colour Satellite Images
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8th Science
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