5 Questions
Which planet is about half the size of Earth?
Mars
What is the primary factor that determines the amount of solar radiation a planet receives?
Distance from the Sun
Which planet has a spheroidal shape?
Earth
What is essential for photosynthesis on a planet?
Sunlight
What is important to sustain life on a planet?
Water
Study Notes
Planetary Characteristics
- Mars is about half the size of Earth.
Planetary Energy Input
- The primary factor that determines the amount of solar radiation a planet receives is its distance from the Sun.
Planetary Shape
- All planets have a spheroidal shape.
Photosynthesis
- Water is essential for photosynthesis on a planet.
Sustaining Life
- Water is important to sustain life on a planet.
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