4. What is ATMOSPHERE ? It is a mixture of gases, water vapor, and dust that surrounds and protects the Earth from extreme temperature and harmful rays.

5. COMPONENTS

6. ATTRIBUTE SCORE 543 PARTICIPATION 100% of the members participated in the activity. 75% of the members participated in the activity. 50% of the members participated in the activity. COHERENCE 100% of the ideas presented are related to the activity or questions. 75% of the ideas presented are related to the activity or questions. 50% of the ideas presented are related to the activity or questions. PRESENTATION100% of the information presented are correct. 75% of the information presented are correct. 50% of the information presented are correct.

24. Bottom layer of the atmosphere. Densest layer. Extends 10-12 km above the surface. Also called the weather sphere. Temperature decreases as elevation increases tropopause

25. Second layer of the atmosphere. Extends 12-50 km from the surface. Airplane pilots fly here. Location of the ozone layer. Temperature increases as altitude increases stratopause

27. Third layer of the atmosphere. Thickest layer, about 35 km thick Found at 80 km altitude. Coldest layer of -90ºC. Temperature decreases as elevation increases. Meteors burn here. mesopause

28. Characterized by rising temperature. Can be as high as 1200ºC-1800ºC. Reach a height of 400 km or more. Also called the ionosphere. Auroras and radio waves (satellite) happen in this layer.

29. Topmost layer of the atmosphere. Boundary between Earth and outer space Region where atmospheric gases and particles escape into space. At an altitude of about 500-1,000 km above Earth’s surface and extends up to 10,000 km.

32. 1. Which layer of the atmosphere is the hottest? A. exosphere B. thermosphere C. stratosphere D. mesosphere A. exosphere B. thermosphere C. stratosphere D. mesosphere

33. 2. In what layer can you find abundant ozone gases? A. stratosphere B. thermosphere C. mesosphere D. exosphere A. stratosphere B. thermosphere C. mesosphere D. exosphere

34. 3. Why do airplane pilots fly on the stratosphere? A. Because of the clean air B. There are water vapor C. Because airplanes become slower D. There is less/no water vapor A. Because of the clean air B. There are water vapor C. Because airplanes become slower D. There is less/no water vapor

35. 4. The layer that serves as the boundary between Earth and outerspace. A. exosphere B. mesosphere C. troposphere D. thermosphere A. exosphere B. mesosphere C. troposphere D. thermosphere

36. 5. What is the other term for thermosphere? A. troposphere B. ionosphere C. mesosphere D. exosphere A. troposphere B. ionosphere C. mesosphere D. exosphere

38. 1. B 2. C 3. D 4. A 5. B 1. B 2. C 3. D 4. A 5. B