WEEK-1_1STQ_EARTH-AS-HABITABLE-PLANET.pptx

Welcome my DEAR Students!  EARTH SCIENCE. First Semester – First Quarter Lesson 1 Earth as a Habitable Planet At the end of this module, the learners should be able. to: 1.Identify the different factors necessary to support life in a planet; 2.Des...

Welcome my DEAR Students!  EARTH SCIENCE. First Semester – First Quarter Lesson 1 Earth as a Habitable Planet At the end of this module, the learners should be able. to: 1.Identify the different factors necessary to support life in a planet; 2.Describe the characteristics of Earth necessary to support life; and 3.Explain how each characteristic affect life on Earth REVIEW: Just a part of the vast universe is the solar system.. From the previous concepts learned, identify the planets in the solar system in the given illustration.  What’s In Neptune Uranus What do you think are the Saturn characteristics Jupiter of the planet Mars Earth that make Earth it different from Venus all the other planets? Mercury. 4 Pics 1 Word: Guess the specific word.that fits the theme of the photos presented. 1. 4 Pics 1 Word: Guess the specific word.that fits the theme of the photos presented. 2. 4 Pics 1 Word: Guess the specific word.that fits the theme of the photos presented. 3. 4 Pics 1 Word: Guess the specific word.that fits the theme of the photos presented. 4. 4 Pics 1 Word: Guess the specific word.that fits the theme of the photos presented. 5.. Task: Create a graphic organizer to describe the characteristics of Earth. Make sure to include the factors that makes the Earth habitable and write a brief description about it. You can use the sample diagram below as a guide. You can be creative as you can in making your graphic organizer. RUBRICS:.... PRESENTATIO N OF OUTPUT  Earth is the third planet in the solar system. EARTH It is said to be 4.56 biliion years old. It revolves aeound the sun 365 days. The only planet on which life is known to exist.  Factors that make a Planet Habitable 1. Liquid water. Dissolves and transports chemicals within and to and from a cell. Factors that Not Enough of Just Right Too Much of the Situation in the make a the Factor Factor Solar Planet System Habitable The chemicals a Water is regularly Too much water is Surface: only Earth’s Water cell needs for available. not a problem, as surface has water, though Mars once had energy and long as it is not so surface water and still growth are NOT toxic that it has a water ice in its polar ice caps. Saturn’s dissolved or interferes with the moon, Titan, seems to transported to the chemistry of life. be covered with liquid cell. methane. Sub-surface: mars and moons have deposits of underground ice which might melt to produce water. Europa, has a vast oceans beneath its outer shell. 23 2. Breathable Atmosphere Traps heat; shields the surface from harmful radiation, and provides chemicals needed for life such as nitrogen and carbon dioxide. The presence of gravity also helps in sustaining its atmosphere. Factors that Not Enough of Just Right Too Much of the Situation in the make a the Factor Factor Solar Planet System Habitable Atmosphere Small planets Earth & Venus are Venus’s Of the solid and moons have the right size to atmosphere is planets & insufficient hold a sufficient- 100 times thicker moons, only Earth, gravity to hold an sized atmosphere. than Earth’s. It is Venus, & Titan atmosphere. The Earth’s made almost have significant gas molecules atmosphere is entirely of atmospheres. escape to space, about 100 miles greenhouse Mars’s atmosphere leaving the planet thick. It keeps gases, making the is or moon the surface warm surface about 1/100th that without an & protects it from too hot for life. The of Earth’s, too insulating blanket radiation & small four giant planets small for significant or a protective to medium-sized are completely insulation or shield. meteorites. made of gas. shielding. 25  3. Correct Temperature. It influences how quickly atoms, molecules or organisms move.  Factors that make a Planet Habitable Factors that Not Enough of Just Right Too Much of the Situation in the make a Planet the Factor Factor Solar System Habitable Temperature Low Life seems to be At about 1250C, Surface: Only Influences how temperatures limited to a protein the Earth’s quickly atoms and cause chemicals temperature and carbohydrate surface is in this molecules move. to react slowly, range -150C to molecules and the temperature which interfere 1150C. In this genetic material range. Sub- with the reactions range, liquid (e.g., DNA and surface: the necessary for water can exist RNA) start to interior of the life. It can also under certain break solid planets cause freezing of conditions. apart. Also, high and moons water, making temperatures maybe in this liquid water cause the quick temperature unavailable. evaporation of range. water. 27  4. Energy Living things use light energy or chemical energy to run essential life processes. Earth is at the right position from the sun, enabling it to harness enough sunlight. Factors that Not Enough of Just Right Too Much of the Situation in the make a Planet the Factor Factor Solar Habitable System Energy When there is With a steady Light energy is a Surface: The too little sunlight input of either light problem if it inner planets get or too few of the or chemical makes a planet too much sunlight chemicals that energy, cells can too hot or if for life. The outer provide energy to run the chemical there are too planets get too cells, such as reactions many harmful little. Sub-surface: iron or sulfur, necessary for life. rays, such as Most solid organisms die. ultraviolet. Too planets & moons many energy-rich have energy-rich chemicals are not chemicals. a problem. 29 5. Nutrients It is an essential factor used to build and maintain organism’s body structure. In our planet, some processes recycle nutrients. Water, carbon and oxygen, phosphate and nitrogen cycles are some of the examples. Volcanism also helps in cycling the nutrients Factors that Not Enough of the Just Right Too Much of the Situation in the Solar make a Planet Factor Factor System Habitable Without chemicals to All solid planets Too many nutrients are Surface: Earth has Nutrients make proteins & and moons have the not a problem. a water cycle, an carbohydrates, same general However, too active atmosphere, and organisms cannot chemical makeup, circulation system, volcanoes to circulate grow. so nutrients are such as the constant nutrients. Venus, Planets without present. Those with volcanism on Titan, Io, and Mars systems to deliver a water cycle Jupiter’s moon, lo, or have nutrients to it’s and volcanic activity the churning nutrients and ways to organisms (e.g., a can transport atmospheres of circulate them to water cycle or and replenish the the gas planets, organisms. volcanic activity) chemicals required interferes with an Sub-surface: Any cannot support life. by living organisms. organism’s ability to planet or moon with Also, when nutrients get enough nutrients. sub-surface water or are spread so thin molten rock that that they are hard to circulates and obtain, such as on a replenish nutrients gas planet, life for organisms. cannot exist. 31 Earth, Venus, and Mars may have similarities: (1) They all are terrestrial planets, made of solid rocks and silicates; (2) They all have an atmosphere; (3) They all almost have the same time to rotate on their axes; (4) Earth and Mars both have water; (5) They all have carbon dioxide; and (6 All have landforms. Earth, Venus, and Mars have differences: (1) Venus has no water; (2) Venus and Mars don’t have oxygen; and (3) Earth has life forms. Questions: 1.What temperature is ideal for living things to survive? 2.Which planet possesses the ideal temperature for life forms to thrive in? 3.Greenhouse gases are capable of trapping heat. What do you think will happen to the Earth in the absence of these gases? 4.Venus and Mars have gaseous envelopes just like the Earth. Why is it that life doesn’t exist in these 2 planets? 5.Scientific evidence reveal that Jupiter, Saturn, Uranus, and Neptune contain a very thick atmosphere of mostly hydrogen and helium. Do you think this atmospheric content is capable of sustaining life? Yes, or no? Why? 6.Sunlight is required to run chemical reactions necessary for life. Why do the inner and outer planets not habitable even if sunlight is available? 7.What is unique about the way nutrients on planet Earth contribute to sustaining life? What I Have Learned (by group) A. Complete the table by supplying the needed information on your answer sheet.  Rubric for group activity Cooperation 5 Organization 5 Time frame 5 Presentation 5 Total 20 Watch a video entitled “Earth as a Pla net of Life” through this YouTube link: https://www.youtube.com/watch?v=H CDVN7DCzYE` In a short paragraph, share thoughts about the formation of the earth and existence of life on earth Earth 101 | National Geographic – You Tube Thank you and God bless!