Unit 2: Why Life on Earth is Possible
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Questions and Answers

What are the basic things needed for a plant to survive?

Sunlight, air, and water.

What can happen if a plant does not receive enough sunlight and water?

The plant will wilt.

What makes sunlight, air, and water essential for life on Earth?

They are necessary for survival of plants and other organisms.

Is there an infinite supply of sunlight, air, and water?

<p>False</p> Signup and view all the answers

How should one care for a new plant?

<p>Expose it to sunlight and water it daily.</p> Signup and view all the answers

Which theory suggests that the universe started as a singularity?

<p>Big Bang Theory</p> Signup and view all the answers

What does the Nebular Theory explain?

<p>The solar system originated from a nebula.</p> Signup and view all the answers

What describes the Oscillating Universe Theory?

<p>The universe is expanding and will eventually contract.</p> Signup and view all the answers

Match the theories to their descriptions:

<p>Big Bang Theory = Suggests the universe started as a singularity Oscillating Universe Theory = Universe expands and contracts Nebular Theory = Solar system originated from a nebula Encounter Theory = Planets formed from ejected material from the sun</p> Signup and view all the answers

Study Notes

Why Life on Earth is Possible

  • Life on Earth depends on sunlight, air, and water; these are essential for the survival of plants, animals, and humans.
  • Failure to provide these basic needs can lead to the wilting of plants, affecting the organisms that depend on them for survival.

Essential Questions

  • Understanding the necessity of sunlight, air, and water is crucial for the existence of life on Earth.
  • Exploration of whether these resources are infinite and how human activities can impact their availability.
  • Discussion on personal contributions towards the conservation of sunlight, air, and water resources.

Theories on the Origin of the Universe

  • Big Bang Theory: Proposes that the universe began as a singularity with extreme temperature and density.
  • Oscillating Universe Theory: Suggests that the universe goes through cycles of expansion and contraction.
  • Nebular Theory: Claims that the solar system emerged from a nebula composed of dust and ionized particles.
  • Encounter Theory: The formation of planets is due to materials ejected from the sun during interactions with other celestial bodies.

Objectives of Lesson 2.1: The Origin of Planet Earth

  • Explaining Earth’s formation through accretion hypotheses.
  • Differentiating between homogenous and heterogenous accretion hypotheses.

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Description

Explore the intricacies of how life on Earth exists in this comprehensive quiz focused on Unit 2. Delve into the origin of our planet and understand the essential questions and concepts related to Earth's livability. Test your knowledge with various objectives and warm-up exercises!

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