1 / 19

Life On Earth

Life On Earth. Why does Life Exist on Earth?. Essential Standard. 6.E. 1 Understand the earth/moon/ sun system , and the properties, structures and predictable motions of celestial bodies in the Universe. Clarifying Objective.

evette
Download Presentation

Life On Earth

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Life On Earth Why does Life Exist on Earth?

  2. Essential Standard • 6.E.1 Understand the earth/moon/sun system, and the properties, structures and predictable motions of celestial bodies in the Universe.

  3. Clarifying Objective • 6.E.1.2 Explain why Earth sustains life while other planets do not based on their properties (including types of surface, atmosphere and gravitational force) and location to the Sun.

  4. Essential Questions • What are the conditions needed for life on Earth? • What conditions on other planets make it unsuitable for life?

  5. Earth • The Earth is the 3rd planet from the sun • It contains both landmasses & oceans • It is the ONLY PLANET that is known that CAN SUPPORT LIFE • This is why

  6. Location from the Sun • Earth is the only planet that is the CORRECT LOCATION from the SUN to have life • Earth’s location from the sun is the reason that conditions for life are possible • If the planet were closer to the sun life would be impossible as it would be if it were further from the sun

  7. 6 Conditions for Life • For any planet or moon or anything to support life (anything from bacteria to humans) you have to have 5 conditions • Water • Atmosphere (Oxygen) • Correct Temperature • Light • Correct Gravity • Types of Surfaces

  8. Water • The first ingredient you need to sustain life is WATER • Water must exist in liquid form or have the ability to become liquid • Water is the breeding ground for chemical reactions essential to life • On earth you can find water in all three medium forms (solids, liquids, gasses) • http://www.youtube.com/watch?v=3eSTQ1KYKIE • http://www.youtube.com/watch?v=FOmoO6Xj1sw

  9. Atmosphere • The second key ingredient is the RIGHT kind of Atmosphere • An ATMOSPHERE that can sustain life MUST contain high amounts of OXYGEN • Oxygen is the key in the atmosphere for life to exist • http://www.youtube.com/watch?v=muwCjTJHrUI

  10. Correct Temperature • The third ingredient is having the CORRECT TEMPERATURE for life to exist • The earth is one of two planets (Mars) to have the correct temperature for life to exist • The temperature has to be between 30-180 degrees • Other planets are either too close (hot) or too far (cold) to sustain life

  11. Light • The fourth ingredient is LIGHT • To sustain life a planet must have light • Light gives all living things energy and it starts the food cycle • Light is the key to starting photosynthesis which is how plants make their food • http://www.youtube.com/watch?v=4fYLEhqYGIU

  12. Food Chain

  13. Correct Gravity • The 5th ingredient is the CORRECT amount of GRAVITY on the planet • Remember gravity is the force that holds you to the ground and controls weight • All planets have a gravitational pull to the sun • http://www.youtube.com/watch?v=tIn_EvuNEh4

  14. Correct Gravity • The closer the planet to the sun the more gravity they have • The further from the sun the less gravity they have • If the planet is too far from the sun the atom particles you are made up would disintegrate • If you were too close your legs would break because your bones would not be strong enough to handle the increased weight • http://focus.org.uk/gravity.php

  15. Types of Surfaces • The last ingredient is the CORRECT TYPE of SURFACE for life • The surface of the Earth is composed of both land & water • It is the only planet surface publically known to be conducive to life

  16. Why can Earth Sustain Life? • Earth can sustain life and no other planet can because all of these FACTORS exist at the SAME TIME • Correct Distance from the sun • Water in liquid form • Atmosphere with Oxygen • Correct Temperature • Light • Correct Gravity • Right Surface

  17. Essential Questions • Get with a partner and answer… • What are the conditions needed for life on Earth? • What conditions on other planets make it unsuitable for life?

  18. EOG Questions • Which factor makes Earth different from all the other planets in the solar system in its ability to support life? • A) The Earth is exposed to rays from the sun. • B) The Earth has only one moon that orbits around it. • C) The Earth rotates in an elliptical orbit around the sun. • D) The Earth has a breathable atmosphere.

  19. Important Points • Earth is the only publically known planet to support LIFE • There are 6 key ingredients to support life • Water in liquid form • Correct Temp • Correct Gravity • Atmosphere w/Oxygen • Light • Correct Surface Type • At least one of these FACTORS does NOT exist on all the rest of the planets in the Solar System

More Related