Module 7 8 Layers of The Atmosphere Temperature and Altitude | PDF ... - Free Printable

Problem Analysis:

The task involves identifying the layers of the Earth's atmosphere based on given descriptions and choosing the best word to complete sentences related to atmospheric properties. Let's solve it step by step.

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Part I: Identify the Layer of the Atmosphere

#### 1. The layer of the atmosphere where virtually all weather occurs.
- Answer: Troposphere
- Explanation: The troposphere is the lowest layer of the atmosphere, extending from the Earth's surface up to about 12 km (7 miles) at the equator and about 8 km (5 miles) at the poles. It contains most of the weather phenomena, such as clouds, rain, and storms, because it holds the majority of the atmosphere's water vapor and heat.

#### 2. Layer of the atmosphere where ozone is found.
- Answer: Stratosphere
- Explanation: The stratosphere is located above the troposphere and extends up to about 50 km (31 miles) above the Earth's surface. It is known for containing the ozone layer, which absorbs harmful ultraviolet (UV) radiation from the Sun, protecting life on Earth.

#### 3. The atmospheric layer that reflects radiowaves back to Earth.
- Answer: Ionosphere
- Explanation: The ionosphere is a region of the upper atmosphere, starting at about 60 km (37 miles) above the Earth's surface and extending up to about 1,000 km (620 miles). It contains ionized gases that can reflect radio waves, allowing long-distance communication.

#### 4. Space shuttles fly in this area and it is also where the auroras are found.
- Answer: Thermosphere
- Explanation: The thermosphere is located above the mesosphere and extends up to about 800 km (500 miles) above the Earth's surface. It is characterized by high temperatures due to the absorption of solar radiation by oxygen and nitrogen molecules. This layer is where space shuttles orbit and where auroras occur when charged particles from the Sun interact with Earth's magnetic field.

#### 5. The layer between 500 km to 1,000 km from Earth.
- Answer: Exosphere
- Explanation: The exosphere is the outermost layer of the Earth's atmosphere, starting at about 500 km (310 miles) and extending outward into space. It is extremely thin, with very few gas molecules present, and is the boundary between Earth's atmosphere and outer space.

#### 6. Aircraft flying in this area may have a bumpy ride—commonly known as turbulence.
- Answer: Troposphere
- Explanation: Turbulence is most common in the troposphere because it contains the majority of the atmosphere's moisture and temperature variations, leading to air currents and disturbances that cause turbulence for aircraft.

#### 7. The layer of air that extends to about 50 km from Earth’s surface.
- Answer: Mesosphere
- Explanation: The mesosphere is the layer directly above the stratosphere and below the thermosphere. It extends from about 50 km (31 miles) to about 80 km (50 miles) above the Earth's surface. It is known for being the coldest part of the atmosphere, with temperatures dropping to around -90°C (-130°F).

#### 8. It is where the meteors of rock fragments burn up.
- Answer: Mesosphere
- Explanation: Meteors typically burn up in the mesosphere due to friction with the air molecules as they enter the Earth's atmosphere. This layer is responsible for the "shooting stars" we see in the night sky.

#### 9. Satellites are stationed in this area.
- Answer: Thermosphere or Exosphere
- Explanation: Many satellites orbit in the thermosphere or exosphere, where there is minimal atmospheric drag, allowing them to maintain stable orbits. However, since the thermosphere is more commonly associated with satellite orbits, it is the better answer here.

#### 10. The layer closest to the earth.
- Answer: Troposphere
- Explanation: The troposphere is the layer closest to the Earth's surface, extending from the ground up to about 12 km (7 miles) at the equator. It is where we live and breathe.

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Part II: Choose the BEST Word That Completes the Sentence

#### 1. Atmosphere acts as (blanket, wall, light) of the earth.
- Answer: Blanket
- Explanation: The atmosphere acts like a blanket, insulating the Earth by trapping heat and protecting it from extreme temperature fluctuations.

#### 2. The upper limit of the atmosphere is called (stratosphere, troposphere, exosphere).
- Answer: Exosphere
- Explanation: The exosphere is the outermost layer of the atmosphere, marking its upper limit where it gradually merges with outer space.

#### 3. The layer after the mesosphere where air is very thin is called the (exosphere, stratosphere, thermosphere).
- Answer: Thermosphere
- Explanation: After the mesosphere comes the thermosphere, which is characterized by very thin air and high temperatures due to solar radiation.

#### 4. The gas that makes up most of the Earth’s atmosphere is (Oxygen, Nitrogen, Carbon Dioxide).
- Answer: Nitrogen
- Explanation: Nitrogen makes up about 78% of the Earth's atmosphere, while oxygen accounts for about 21%, and carbon dioxide is only a trace gas (about 0.04%).

#### 5. (Ozone, Meteors, Auroras) layer protects us from the harmful radiation of the sun.
- Answer: Ozone
- Explanation: The ozone layer, located in the stratosphere, absorbs harmful ultraviolet (UV) radiation from the Sun, protecting life on Earth.

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Final Answers:

#### Part I:
1. Troposphere
2. Stratosphere
3. Ionosphere
4. Thermosphere
5. Exosphere
6. Troposphere
7. Mesosphere
8. Mesosphere
9. Thermosphere
10. Troposphere

#### Part II:
1. Blanket
2. Exosphere
3. Thermosphere
4. Nitrogen
5. Ozone

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Boxed Final Answer:

\[
\boxed{
\text{Part I: 1. Troposphere, 2. Stratosphere, 3. Ionosphere, 4. Thermosphere, 5. Exosphere, 6. Troposphere, 7. Mesosphere, 8. Mesosphere, 9. Thermosphere, 10. Troposphere}
}
\]
\[
\boxed{
\text{Part II: 1. Blanket, 2. Exosphere, 3. Thermosphere, 4. Nitrogen, 5. Ozone}
}
\]