Solving exercises from Geography textbook for grade 6 lesson 17: The Atmosphere

Solving exercises from Geography textbook for grade 6 lesson 17: The Atmosphere
 

Question 1: Based on diagram figure 45, tell:

+ Components of air
+ Proportion of each component?

* Solution:

Based on diagram figure 45, we see:
- Air has 3 components: Water vapor and other gases, Oxygen, Nitrogen.
- Proportion of each component:

• Nitrogen gas: 78%
• Oxygen gas: 21%
• Water vapor and other gases: 1%
   

Question 2: Observe diagram figure 46, tell:

+ What are the layers of the atmosphere?
+ The layer near the ground, with an average height of up to 16 km, is what layer?

* Solution:

Observing diagram figure 46, we see:
- The atmosphere consists of 3 layers: Troposphere, Stratosphere, higher layers of the atmosphere.
- The layer near the ground, with an average height of up to 16 km, is the Troposphere.
 

Question 3:

Based on the knowledge learned, tell the role of the atmosphere for life on Earth.

* Solution:

The atmosphere is very important for life on Earth, as all human activities are related to the atmosphere. Phenomena such as clouds, rain, thunder, lightning, waves, wind, storms... have a great impact on the lives of organisms on Earth. Without air, there would be no life on Earth. The atmosphere is also considered as the 'protective armor' protecting life for Earth, because they prevent harmful rays from the Sun and the universe from entering Earth.
 

Question 4:

Based on the gas blocks table, tell:
- Where do hot and cold air masses form? Describe the characteristics of each type.
- Where do maritime and continental air masses form? Describe the characteristics of each type.

* Solution:
- Hot air masses form over low latitude regions, with relatively high temperatures.
- Cold air masses form over high latitude regions, with relatively low temperatures.
- Maritime air masses form over seas and oceans, with high humidity.
- Continental air masses form over land areas, with relatively dry characteristics.
 

Question 5:

How many layers is the atmosphere divided into? Describe the position and characteristics of the troposphere.

* Solution:

- The atmosphere is divided into 3 parts:

• Troposphere
• Stratosphere
• Higher layers of the atmosphere.

- Position and characteristics of the troposphere:

• The troposphere is the layer located at an altitude of 0 - 16 km
• The air density is high
• The temperature decreases as altitude increases, decreasing by 0.6 degrees Celsius every 100 meters
• The air moves vertically
• Where meteorological phenomena occur: Clouds, rain, wind, storms...

Question 6:

Based on what are hot, cold air masses and maritime, continental air masses separated?

* Solution:

- Based on Temperature: Hot and cold air masses.
- Based on the underlying surface being ocean or land: Maritime and continental air masses.

Question 7:

When does an air mass become unstable?

* Solution:

- Air masses do not stay still, they are constantly moving and changing the weather of the places they pass through.
- At the same time, they are also influenced by the characteristics of those places they pass through, which can also be called instability.