Science7_Week 3(A) 4TH QUARTER topic.pptx

ppt

1. SCIENCE 7 Layers of the Atmosphere

2. Most Essential Learning Competencies After going through this lesson, you should be able to: Discuss how energy from the sun interacts with the layers of the atmosphere. (S7ES-IVd-5) Specifically, you are expected to: Identify the different layers of the atmosphere; and Describe how the Earth’s natural greenhouse effect works.

3. Directions: Put a check mark ( ) if the activity given below is a good practice of conserving and protecting the Earth’s natural resources and (X) if it’s not. ACTIVITY 1 ___________1. Burning plastics. ___________2. Reducing usage of fossil fuels in energy production.

4. Directions: Put a check mark ( ) if the activity given below is a good practice of conserving and protecting the Earth’s natural resources and (X) if it’s not. ACTIVITY 1 ___________3. Making a plan to reduce, reuse and recycle materials ___________4. Putting up trash cans for waste segregation at home

5. Directions: Put a check mark ( ) if the activity given below is a good practice of conserving and protecting the Earth’s natural resources and (X) if it’s not. ACTIVITY 1 ___________5. Throwing garbage anywhere. ___________6. Separating biodegradable and non-biodegradable waste.

6. The Earth’s relatively thin atmosphere primarily consists of a mixture of gases. Shown in Figure 1, the atmosphere contains 78% nitrogen and 21% oxygen gas. The remaining 1% contains several inactive gases (argon, neon, helium, hydrogen, and xenon) and several other gases that vary in concentration (water vapor, carbon dioxide, methane, nitrous oxide, ozone, and chlorofluorocarbons). Although water vapor and carbon dioxide make up a very small amount of the gases in Earth’s atmosphere, they are very important because of their ability to absorb heat.

7. Earth's atmosphere has a series of layers, each with its own specific traits. Figure 2 shows the layers of the Earth’s atmosphere. Moving upward from ground level, these layers are named the troposphere, stratosphere, mesosphere, thermosphere and exosphere. The exosphere gradually fades away into the realm of interplanetary space. The atmosphere’s division of layers depends on how temperature changes with height. Layers of the Atmosphere

8. Troposphere Temperature: DECREASES ( from 17ºC to -51ºC) Characteristics: It is the lowest region of the Earth's atmosphere. It is where we live and most weather occurs. It is where the Ground-level ozone is found. It is considered as “bad” ozone because it is an air pollutant that damages human health, vegetation, and many common materials. Layers of the Atmosphere

9. Stratosphere Temperature: INCREASES (from -51 ºC to -15 ºC ) Characteristics: It is the only layer where jets can travel. It is where the Protective Ozone is found. It is considered as “good” ozone because it protects life on Earth from the harmful effects of the Sun's Ultraviolet (UV) rays. Layers of the Atmosphere

10. Stratosphere Temperature: INCREASES (from -51 ºC to -15 ºC ) Characteristics of the Ozone (O3) : It comprises 90% of the stratosphere. It is found between 16 and 48 kilometers (10 and 30 miles) above the Earth's surface. Layers of the Atmosphere

11. Mesosphere Temperature: DECREASES (up to -100 ºC) Characteristics : It is the coldest region of the atmosphere. It extends from the top of the stratosphere to an altitude of about 90 kilometers. It is the layer that protects the Earth by burning up meteors while entering the atmosphere. Layers of the Atmosphere

12. Thermosphere Temperature: INCREASES (from 500 ºC to 2,000 ºC) Characteristics : Its air molecules are 1 km apart. It is the first layer exposed to the Sun's radiation and so it is first heated by the Sun. It is often considered the “hot layer” because it contains the warmest temperatures in the atmosphere. It is the layer where satellites are found. It is where the Ionosphere is found. Layers of the Atmosphere

13. Thermosphere Temperature: INCREASES (from 500 ºC to 2,000 ºC) Characteristics of Ionosphere: It is the lower part of the Thermosphere. It allows long distance radio communication by reflecting the radio waves back to Earth. It is where the Aurora Borealis (or northern lights, are an ethereal display of colored lights shimmering across the night sky) is found. Layers of the Atmosphere

14. Exosphere Temperature: Varies from very hot to very cold Characteristics: It is the Upper part of Thermosphere. It is the actual "final frontier" of Earth's gaseous envelope. It is where rockets travel. Layers of the Atmosphere

15. Directions: Read each question carefully and choose the letter of the best answer. ASSESSMENT ______1. Why is the atmospheric temperature increasing at the stratosphere? A. It is closer to the sun. B. It is under a lot of pressure. C. It is less dense than the troposphere. D. It is due to the presence of the ozone layer .

16. Directions: Read each question carefully and choose the letter of the best answer. ASSESSMENT ______2. You and your friends joined a mountain climbing activity. You have noticed that as you go higher, you felt that the air is getting colder. What explains this condition? A. The temperature increases as the altitude decreases. B. The temperature increases as the altitude increases. C. The temperature decreases as the altitude increases. D. The temperature decreases as the altitude decreases.

17. Directions: Read each question carefully and choose the letter of the best answer. ASSESSMENT ______3. What is the correct sequence of the layers of the atmosphere from the ground up to the space? A. Exosphere – Mesosphere – Thermosphere – Stratosphere – Troposphere B. Exosphere – Thermosphere – Mesosphere – Stratosphere – Troposphere C. Troposphere – Stratosphere – Mesosphere – Thermosphere – Exosphere D. Troposphere – Stratosphere – Thermosphere – Mesosphere – Exosphere

18. Directions: Read each question carefully and choose the letter of the best answer. ASSESSMENT ______4. Which layer of the atmosphere is closest to the Earth's surface? Troposphere Stratosphere Mesosphere Thermosphere

19. Directions: Read each question carefully and choose the letter of the best answer. ASSESSMENT ______5. In which atmospheric layer does the ozone layer reside? Troposphere Stratosphere Mesosphere Thermosphere

20. Directions: Read each question carefully and choose the letter of the best answer. ASSESSMENT ______6. Where do most weather phenomena, such as clouds and storms, occur? Troposphere Stratosphere Mesosphere Thermosphere

21. Directions: Read each question carefully and choose the letter of the best answer. ASSESSMENT ______7. The layer of the atmosphere where temperatures rise with altitude is the: Troposphere Stratosphere Mesosphere Thermosphere

22. Directions: Read each question carefully and choose the letter of the best answer. ASSESSMENT ______8. Which layer of the atmosphere is known for containing the auroras? Troposphere Stratosphere Mesosphere Thermosphere

23. REFERENCE BOOK 1. troposphere 2. stratosphere 3. mesosphere 4. thermosphere 5. exosphere 6. solar radiation 7. greenhouse gases 8. earth’s surface 9. infrared radiation 10. greenhouse effect What I Have Learned Asuncion, Alvie J., et al. Science Grade-7 Learner’s Material. 2017. First Edition. 2nd Floor Dorm G, PSC Complex, Meralco Avenue. Pasig City, Philippines 1600: Department of Education, pp 235-237 Mejia, Ivy P., Obille , Eligio C. Jr.,Tan , Merle C. 2013. Science Grade-7 Learner's Material. 2nd Floor Dorm G, PSC Complex, Meralco Avenue, Pasig City: Departmnet of Education.pp 237-243 Project EASE. 2017. Department of Education DepED Complex, Meralco Avenue Pasig City Department of Education, p 4 ELECTRONIC SOURCES n.a. 2015. Layers of Earth’s Atmosphere. Accessed on May 29,2020 https://scied.ucar.edu/atmosphere-layers 21 n.a. 2000-2020. Composition of Earth's Atmosphere. Accessed on June 2,2020 https://www.visionlearning.com/en/library/Earth-Science/6/Composition-of-Earths Atmosphere/107/quiz n.a. 2005-2020. Exploring Nature Science Education Resource. Accessed on June 2,2020. https://www.exploringnature.org/db/view/Layers-of-the-Atmosphere Matching-Quiz n.a.2010. The Earth's Atmosphere. Accessed on June 15,2020 https://www.haystack.mit.edu/edu/pcr/climate_CHANGE/Earth%27s%20Atmosphe re/Layers%20of%20the%20Earth%27s%20Atmosphere%20Worksheet%20include s%20background%20info,%20student%20worksheet,%20answer%20key.pdf%20 Accessed n.a. 2020. iRubric : Science Project: Model and Presentation rubric. Accessed June15,2020.https://www.rcampus.com/rubricshowc.cfm?sp=yes&code=VC4AB9& n.a. 2020. What causes the aurora borealis? Accessed July 27, 2020. https://earthsky.org/earth/what-causes-the-aurora-borealis-or-northern-lights n.a. June 25, 2009. Layers of the Atmosphere. Accessed July 28,2020. https://www.weather.gov/jetstream/layers n.a .2016. Climate Science Investigation-NASA. January 14. Accessed May 21, 2020. http://www.ces.fau.edu/nasa/module-2/atmosphere/earth.php. Beaudry, Frederic. "What Are Greenhouse Gases?" ThoughtCo. (Accessed July 10, 2020).https://www.thoughtco.com/what-are-greenhouse-gases-1203888 Brown, Kirsten. 2020. What Kind of Footprint? Carbon Footprint. March 27. Accessed May 24, 2020. https://www.teachengineering.org/lessons/view/cub_footprint_lesson1. Lallanila , Marc. 2018. LIVESCIENCE. March 08. Accessed June 08, 2020. https://www.livescience.com/37743-greenhouse-effect.html. MrGeoGwagg . 2015. Greenhouse Effect and Anthropogenic Warming. June 24. Accessed May 21, 2020. https://mrgeogwagg.wordpress.com/2015/06/24/greenhouse-effect-and anthropogenic-warming/. Zhabska T.S. 2020. Layers of the Earth’s Atmosphere. Exploring the Environment: Global Climate Change Module. Retrieved from: https://www.google.com/imgres?imgurl=http://ete.cet.edu/gcc/style/images/uploa ds/student%2520pages/earth-atmosphere-layers.jpg MODULES FROM Region XI . Published by the Department of Education – Region XI .