Class 4 Exam > Class 4 Notes > EVS for Class 4 > Worksheet: A River's Tale - 2
A River's Tale - 2 Class 4 Worksheet EVS Chapter 13
Q1: Name the following
(i) It is a natural disaster that occurs due to heavy tidal waves.
(ii) It is a hydroelectric plant that generates electricity.
(iii) These animals are found in the ocean.
(iv) They are substances that make the water dirty.
(v) It is the longest river in the world.
Q2: Fill in the blanks
(i) _________is the deepest ocean.
(ii) _________is a process of separating liquid from solid.
(iii) _________ is a natural disaster caused due to heavy rain.
(iv) _________is the longest river.
(v) The diseases caused by water are called _________ diseases.
Q3: Give two examples of each
(i) Aquatic animals
(ii) Rivers
(iii) Water-borne diseases
(iv) Aquatic plants
(v) Oceans
Q4: True and False
(i) Typhoid is an air-borne disease.
(ii) Cleaning near water bodies is a good activity.
(iii) Boiling the water makes it more dirty.
(iv) Filtration is a process of adding two liquids.
(v) Decantation is a process of separating liquid from solid.
Q5: Short Questions Answer
(i) What is an immiscible liquid?
(ii) What is decantation?
(iii) What is potable water?
(iv) What is filtration?
(v) What is flood?
You can find Worksheets Solutions here: Worksheet Solutions: A River's Tale - 2
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FAQs on A River's Tale - 2 Class 4 Worksheet EVS Chapter 13
| 1. What is the importance of rivers? |  |
Ans. Rivers play a crucial role in the ecosystem as they provide a habitat for various species of plants and animals. They also serve as a source of water for drinking, irrigation, and industrial use. Additionally, rivers help in maintaining the water cycle, regulating the climate, and providing transportation routes.
| 2. How do rivers form? | |
Ans. Rivers are formed through a process known as erosion. Rainfall, melting snow, and groundwater seepage contribute to the accumulation of water, which then flows downhill. As the water moves, it erodes the surrounding land, creating a channel that eventually becomes a river.
| 3. What factors affect a river's flow? | |
Ans. Several factors can influence a river's flow. The primary factors include the amount of rainfall in the river's catchment area, the steepness of the river's slope or gradient, the size of the river's basin, and the presence of any dams or obstacles that may impede the flow.
| 4. How do rivers contribute to the formation of fertile soil? | |
Ans. Rivers contribute to the formation of fertile soil through a process called sediment deposition. As rivers flow, they carry along sediment, such as silt, sand, and clay. When the river water slows down or meets a body of water, the sediment settles and accumulates. Over time, these sediments enrich the soil with nutrients, making it fertile for agriculture.
| 5. What are the major threats to rivers? | |
Ans. Rivers face several threats, including pollution from industrial and agricultural activities, deforestation, and urbanization. These activities can lead to the contamination of river water, loss of habitat for aquatic species, and disruption of the river's natural flow. Climate change also poses a threat to rivers, impacting their flow patterns and increasing the risk of floods and droughts.
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Nov 21, 2024 Last updated |
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