Desert Ecosystem Worksheets & Facts | Inhabitants, Significance - Free Printable
Educational worksheet: Desert Ecosystem Worksheets & Facts | Inhabitants, Significance. Download and print for classroom or home learning activities.
PNG
720×960
183.6 KB
Free · Personal Use
Quality Assured by Worksheets Library Team
Reviewed for educational accuracy and age-appropriateness
ID: #1454378
⭐
Show Answer Key & Explanations
Step-by-step solution for: Desert Ecosystem Worksheets & Facts | Inhabitants, Significance
▼
Show Answer Key & Explanations
Step-by-step solution for: Desert Ecosystem Worksheets & Facts | Inhabitants, Significance
Based on the worksheet titled "CHECK OUT THIS DESERT" and general knowledge about the Sahara Desert, here are the answers to the questions:
---
1. Sahara desert was once green in the year 11,500–5,000. What is this period called?
> The African Humid Period (or Green Sahara Period)
*Explanation:* Between approximately 11,500 and 5,000 years ago, the Sahara experienced a much wetter climate due to changes in Earth’s orbit and increased monsoon activity. This allowed lakes, rivers, grasslands, and forests to flourish — a stark contrast to today’s arid conditions. This era is commonly referred to as the “Green Sahara” or the “African Humid Period.”
---
2. Which rainforest depends on the Sahara for survival?
> The Amazon Rainforest
*Explanation:* Dust from the Sahara Desert is carried by wind across the Atlantic Ocean to the Amazon Basin. This dust contains vital nutrients, especially phosphorus, which helps fertilize the nutrient-poor soils of the Amazon rainforest. Without this dust input, the Amazon’s ecosystem would struggle to maintain its productivity.
---
3. What caused the 1/3 expansion of the desert?
> Climate change (global warming) and human activities like overgrazing and deforestation
*Explanation:* Studies show that the Sahara has expanded by about one-third since 1920. This is primarily attributed to long-term climate change trends, including rising temperatures and shifting rainfall patterns. Human factors such as unsustainable land use, overgrazing, and deforestation have also accelerated desertification at the edges of the Sahara.
---
4. What are the people who mostly inhabit the Sahara desert called?
> Berbers (Amazigh) and Tuareg (among others)
*Explanation:* The Sahara is home to several nomadic and semi-nomadic groups. The Tuareg are among the most well-known, often called the “Blue People” for their indigo-dyed clothing. The Berbers (Amazigh) are indigenous North Africans who also live in parts of the Sahara. Other groups include the Toubou, Fulani, and Arab Bedouins.
---
5. Which country was roughly compared with the size of Sahara desert?
> United States (contiguous 48 states)
*Explanation:* The Sahara Desert covers about 9.2 million square kilometers (3.6 million square miles). This is roughly the same size as the contiguous United States (excluding Alaska and Hawaii), which is about 8.08 million square kilometers. It’s also sometimes compared to China or the entire continent of Europe for scale.
---
6. What are the two permanent rivers in the Sahara desert?
> The Nile River and the Niger River
*Explanation:* While most of the Sahara is dry with no permanent surface water, two major rivers flow through or along its edges:
- The Nile River flows northward through Egypt and Sudan, cutting through the eastern Sahara.
- The Niger River flows through West Africa, skirting the southern edge of the Sahara and providing critical water for communities in countries like Mali and Niger.
These rivers are essential lifelines in an otherwise hyper-arid region.
---
✔ Final Answers Summary:
1. African Humid Period / Green Sahara Period
2. Amazon Rainforest
3. Climate change and human activities (overgrazing, deforestation)
4. Berbers and Tuareg (or other Saharan ethnic groups)
5. United States (contiguous 48 states)
6. Nile River and Niger River
Let me know if you’d like to watch the video referenced to confirm these answers!
---
1. Sahara desert was once green in the year 11,500–5,000. What is this period called?
> The African Humid Period (or Green Sahara Period)
*Explanation:* Between approximately 11,500 and 5,000 years ago, the Sahara experienced a much wetter climate due to changes in Earth’s orbit and increased monsoon activity. This allowed lakes, rivers, grasslands, and forests to flourish — a stark contrast to today’s arid conditions. This era is commonly referred to as the “Green Sahara” or the “African Humid Period.”
---
2. Which rainforest depends on the Sahara for survival?
> The Amazon Rainforest
*Explanation:* Dust from the Sahara Desert is carried by wind across the Atlantic Ocean to the Amazon Basin. This dust contains vital nutrients, especially phosphorus, which helps fertilize the nutrient-poor soils of the Amazon rainforest. Without this dust input, the Amazon’s ecosystem would struggle to maintain its productivity.
---
3. What caused the 1/3 expansion of the desert?
> Climate change (global warming) and human activities like overgrazing and deforestation
*Explanation:* Studies show that the Sahara has expanded by about one-third since 1920. This is primarily attributed to long-term climate change trends, including rising temperatures and shifting rainfall patterns. Human factors such as unsustainable land use, overgrazing, and deforestation have also accelerated desertification at the edges of the Sahara.
---
4. What are the people who mostly inhabit the Sahara desert called?
> Berbers (Amazigh) and Tuareg (among others)
*Explanation:* The Sahara is home to several nomadic and semi-nomadic groups. The Tuareg are among the most well-known, often called the “Blue People” for their indigo-dyed clothing. The Berbers (Amazigh) are indigenous North Africans who also live in parts of the Sahara. Other groups include the Toubou, Fulani, and Arab Bedouins.
---
5. Which country was roughly compared with the size of Sahara desert?
> United States (contiguous 48 states)
*Explanation:* The Sahara Desert covers about 9.2 million square kilometers (3.6 million square miles). This is roughly the same size as the contiguous United States (excluding Alaska and Hawaii), which is about 8.08 million square kilometers. It’s also sometimes compared to China or the entire continent of Europe for scale.
---
6. What are the two permanent rivers in the Sahara desert?
> The Nile River and the Niger River
*Explanation:* While most of the Sahara is dry with no permanent surface water, two major rivers flow through or along its edges:
- The Nile River flows northward through Egypt and Sudan, cutting through the eastern Sahara.
- The Niger River flows through West Africa, skirting the southern edge of the Sahara and providing critical water for communities in countries like Mali and Niger.
These rivers are essential lifelines in an otherwise hyper-arid region.
---
✔ Final Answers Summary:
1. African Humid Period / Green Sahara Period
2. Amazon Rainforest
3. Climate change and human activities (overgrazing, deforestation)
4. Berbers and Tuareg (or other Saharan ethnic groups)
5. United States (contiguous 48 states)
6. Nile River and Niger River
Let me know if you’d like to watch the video referenced to confirm these answers!
Parent Tip: Review the logic above to help your child master the concept of desert biome worksheet.
