Water Class 7 important questions with answers PDF download
Very Short Answer Questions: 1 Mark
1. Fill in the blanks:
i. _____is caused by the gravitational force of the sun and the moon.
Ans: Tide is caused by the gravitational force of the sun and the moon.
ii. _____ is an example of precipitation.
Ans: Hailstorm is an example of precipitation.
iii. Water flows between the ____in a set pattern.
Ans: Water flows between the oceans in a set pattern.
iv. The water in the ocean comes from various ______.
Ans: The water in the ocean comes from various rivers.
2. State true and false:
i. Teesta flows in West Bengal.
Ans: True
ii. Amazon is an African Forest.
Ans: True
iii. Indus is the name of a river that origins in Pakistan.
Ans: True
iv. Rainfall is not known as precipitation.
Ans: False
3. Match the following:
Ans:
4. Choose the correct option:
i. The warm ocean currents origin near____.
a) Equator
b) Poles
c) Tropic of Cancer
d) Tropic of Capricorn
Ans: (a) Equator
ii. The fall of oceanic water twice a day is called ____.
a) Oceanic Current
b) Tide
c) Seismic Effect
d) Wave
Ans: (b) Tide
5. Define the following:
i. Snowfall
Ans: When water vapor condenses and falls or precipitates on the earth’s surface as solid particles of snow at a very low temperature, it is called snowfall.
ii. Water cycle
Ans: When the clouds condense, they fall on the earth’s surface as rain and join the water bodies. This water again evaporates to form clouds. This cyclic phenomenon is called the water cycle.
Short Answer Questions: 2 Marks
6. Define precipitation.
Ans: After evaporation, as the water vapor passes through certain stages it brings what we call precipitation. These stages are—
The water vapor cools down.
Next, it condenses, i.e., gets converted into a liquid form from a gaseous form.
Condensation forms numerous water droplets which lead to the formation of clouds that keep growing.
Finally, the clouds become very heavy and fall on the surface of the earth in liquid or solid forms. This is called precipitation. Examples - rain, snow, and hailstorm.
7. What is the water cycle?
Ans: Liquid water present on the earth’s surface evaporates as a result of the heat coming from the sun and moves to the atmosphere as gaseous vapor. It forms clouds and then falls down as rain. This cyclic phenomenon is called the water cycle.
8. Define ocean currents.
Ans: Ocean currents can be defined as follows—
Ocean currents are streams of warm and cold waters that flow constantly on the surface of the ocean in certain patterns and directions.
These generally flow from the equator to the poles.
9. Define tide and its reason.
Ans: The repeated rise and fall of water in the ocean two times a day is called tide.
Tides are caused due to two reasons which are as follows—
The gravitational force of the sun.
The gravitational force of the moon.
10. What affects the movement of ocean water?
Ans: The movement of ocean water is affected by the following factors:
Wind
Seismic activities like an earthquake,
Volcano
Underwater landslide.
Short Answer Questions: 3 Marks
11. Why is the water of the ocean salty?
Ans: The water in the ocean is not salty from the beginning. It becomes salty as the ocean water undergoes the following stages—
Ocean water comes from various rivers.
These rivers flow over various landforms, soil, and rocks that contain salt.
The salts and minerals dissolve in the water.
When the water reaches the ocean, the amount of salt in it becomes high.
This is the reason why ocean water is salty.
12. Why is the quality of water deteriorating?
Ans: The quality of water deteriorating because of the following reasons—
Drinking water is getting unsafe due to pollution.
Water from agricultural land flows into the river. This contains pesticides and fertilizers and deteriorates the water quality.
In addition, industries release their waste into various water bodies.
Also, domestic sewage ends up in rivers and oceans.
These are the reasons the quality of water is getting worse.
13. Define the water cycle.
Ans: There are certain changes through which water passes, again and again, to form what we call the water cycle. These stages are as follows—
Water from the earth’s surface evaporates due to the heat of the sun and forms water vapor.
The water vapor moves to the atmosphere.
It condenses, forms clouds, and ultimately falls again on the surface of the earth as rain.
Then these stages repeat themselves.
Hence, these stages form a cyclic phenomenon which is known as the water cycle.
14. What is a Tsunami?
Ans: A tsunami can be defined as follows—
Tsunamis are massive destructive tidal waves of about $15$metres in height produced in oceans and seas.
A tsunami is a word used for harbor waves in Japan because whenever tsunamis take place harbors get destroyed.
Tsunamis take place due to underwater oceanic eruptions, earthquakes, or landslides as these displace enormous volumes of ocean water.
One disastrous instance of this phenomenon is when the Indira Point in the Andaman and Nicobar Islands got submerged in the tsunami of $2004$.
15. What is the importance of high tides?
Ans: High tides are important in many ways. Some of them are listed below:
Hides tides aid in navigation by raising the level of the water to the shores. This helps the ships to reach the harbors more efficiently.
High tides are also beneficial for fishermen as, during the occurrence of high tides, a larger number of fish come near the shore.
At some places, high tides contribute to the generation of electricity.
Long Answer Questions: 5 Marks
16. Explain the geographical location of the following rivers Teesta, Niger, Indus, Amazon, Orange, Padma, Nile, Thames, Congo.
Ans: The geographical location of the above-mentioned rivers is as follows—
Teesta: Teesta has its origin in the Brahmaputra river and flows in West Bengal and Sikkim.
Padma: the Padma rises from the Ganges and flows in Bangladesh.
Orange: Orange is a river that flows South Africa.
Niger: Niger is also a river of Africa.
Amazon: Amazon is the largest river in the world. It flows through South America.
Indus: Indus flows in the Indian subcontinent.
Nile: Nile is in Egypt and is the longest river.
Thames: the Thames flows through London.
Congo: Congo River flows through Africa.
17. Explain the following: Tsunami, Oceanic Currents, Tide.
Ans: The above-mentioned terms are described as follows—
Tsunami: Tsunamis are massive destructive tidal waves of about $15$metres in height produced in oceans and seas. These are caused by the sudden movements of the earth under the sea or the ocean generated by underwater oceanic eruptions, earthquakes, or landslides. Hence, they are seismic waves.
Oceanic Currents: Ocean currents are streams of warm and cold waters that flow constantly on the surface of the ocean in certain patterns and directions. These generally flow from the equator to the poles. Ocean currents depend on various factors like temperature and density.
Tide: The gravitational pull of the sun and the moon causes the water in seas and oceans to rise and fall two times each day. This phenomenon is called a tide.
18. What is the importance of water?
Ans: The importance of water is described in the following points:
Water is the most essential part of human life. Life is not possible without water as it serves the most important purposes of our day-to-day life like drinking, washing clothes and other utensils, cooking food, etc.
Seventy percent of the human body is water and it aids in major functions of the human body.
One-third of the planet earth is water. Oceans, seas, lakes, ponds, and other water bodies are major sources of transportation.
Water saves us from many diseases.
Nothing could be grown without water. When any area on the earth gets less rainfall, the agriculture of that area gets negatively affected. It means water is important to make a region agriculturally productive.
Water is the main cause of many natural chemical reactions which help in the life sustenance of humans as well as plants and animals.
19. Explain the water cycle with a diagram.
Ans: There are certain changes through which water passes, again and again, to form what we call the water cycle. These stages are as follows:
Water from the earth’s surface evaporates due to the heat of the sun and forms water vapor.
The water vapor moves to the atmosphere.
It condenses, forms clouds, and ultimately falls again on the surface of the earth as rain.
Then these stages repeat themselves.
Hence, these stages form a cyclic phenomenon which is known as the water cycle.
Figure 5.1: The water cycle
20. Brief about Tsunami.
Ans: Tsunamis can be briefed as follows:
Tsunamis are massive destructive tidal waves of about $15$metres in height produced in oceans and seas.
A tsunami is a word used for harbor waves in Japan because whenever tsunamis take place harbors get destroyed.
Tsunamis take place due to underwater oceanic eruptions, earthquakes, or landslides as these displace enormous volumes of ocean water.
Due to tsunamis, a large amount of water shifts vertically upwards and progresses towards the land near coastal areas.
Tsunamis are considered to be very destructive. Once they get the land they destroy whatever comes in their way. Tsunamis destroy buildings, houses, farms, and anything that comes in their way.
One disastrous instance of this phenomenon is when the Indira Point in the Andaman and Nicobar Islands got submerged in the tsunami of $2004$.
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Focus on key topics for efficient studying.
Prepares students for exams and reduces anxiety.
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Enables self-assessment and progress tracking.
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Conclusion
Reviewing all the crucial questions for Class 7 Science Chapter 5 - Water provides students with a solid grasp of the chapter's topics. The extra and important questions for Class 7 Science Chapter 5 - Water engage in a concept-focused discussion, encompassing all chapter themes. This question-and-answer method proves time-saving during exam prep, offering an efficient way to revise the chapter and enhance understanding. Practising these important questions streamlines preparation and boosts confidence for the upcoming exams.
Related Study Materials for Class 7 Social Science Chapter 5: Water
CBSE Class 7 Social Science Important Questions for All Chapters
Other Bookwise Important Questions Links for Class 7 Social Science
Additional Study Materials for Class 7 Social Science
FAQs on CBSE Important Questions for Class 7 Social Science Our Environment Water - 2025-26
1. What types of short-answer questions are typically asked from the CBSE Class 7 'Water' chapter?
From the 'Water' chapter, you can expect short-answer questions, usually for 1 or 2 marks, that test your knowledge of key definitions. Be ready to define terms like precipitation, tides, ocean currents, and the water cycle. Questions might also ask you to list the factors that affect the height of waves.
2. How should I structure an answer explaining the three main types of ocean movements for a 5-mark question?
To score full marks on a 5-mark question about ocean movements, follow this structure:
- Begin with a brief introduction stating the three movements: waves, tides, and currents.
- Use a separate short paragraph to explain each one.
- For waves, describe them as the rise and fall of water on the surface, mainly caused by wind.
- For tides, explain them as the rhythmic rise and fall of ocean water due to the gravitational pull of the sun and moon. Mention high and low tides.
- For currents, define them as streams of water flowing in specific paths, and mention they can be warm or cold.
3. What is the difference between warm and cold ocean currents? Why is this concept important for exams?
The key difference is their point of origin. Warm currents start near the equator and flow towards the poles (e.g., the Gulf Stream), while cold currents start near the poles and flow towards the equator (e.g., the Labrador Current). This topic is important for exams because ocean currents have a major impact on the climate and temperature of nearby land areas, which is often a basis for reasoning-based questions.
4. What is the best way to answer a question on the water cycle to score full marks?
To ensure you get full marks, explain the water cycle step-by-step using the correct scientific terms. You must include and briefly explain evaporation (water turns to vapour), condensation (vapour forms clouds), and precipitation (water falls back to Earth). For a 3 or 5-mark question, drawing a simple, labelled diagram of the cycle is an excellent way to impress the examiner.
5. Are Multiple Choice Questions (MCQs) expected from Chapter 5, Water?
Yes, you can expect MCQs from this chapter in your Social Science exam. These questions usually check your understanding of basic facts and definitions. For instance, an MCQ could ask, "The rhythmic rise and fall of ocean water twice a day is called a _____" with the correct answer being 'tide'.
6. Tides are caused by gravity, so what makes waves different? Why is it important to know this for an exam?
This is a crucial point of distinction. The main cause for tides is the massive gravitational pull of the moon and the sun on Earth's water. In contrast, waves are surface movements primarily caused by the friction of wind blowing across the water. Knowing this difference is important for exams because it shows a deeper understanding of the different forces that shape our oceans.
7. Why do we say 'Earth is a blue planet, but we still face water scarcity'? How could this be asked as an important question?
This statement highlights a critical fact: although about 71% of Earth is covered in water, over 97% of it is saltwater in oceans, which is unusable for drinking or farming. Only a very small amount is freshwater. In an exam, this concept could form a value-based question asking for your thoughts on the importance of conserving freshwater or suggesting ways to avoid wasting it.
8. What is the key difference between condensation and precipitation to remember for a 1-mark question?
The simplest way to remember is: Condensation is the process where water vapour cools down and turns into liquid droplets to form clouds. Precipitation is the next step, where these droplets in the clouds become heavy and fall to the Earth as rain, snow, or hail. So, condensation makes clouds, and precipitation is what falls from them.
9. How do ocean movements like tides and currents affect human life? Give two examples for a 3-mark question.
Ocean movements are vital for many human activities. For a 3-mark answer, you can provide these two examples:
- Navigation and Trade: High tides help large ships enter and leave ports safely. Ocean currents also act like sea-highways, helping ships save time and fuel.
- Fishing: Areas where warm and cold currents meet are some of the world's best fishing grounds because the mixing of water brings up rich nutrients for fish to eat.
