NCERT Solutions Class 7 Social Science Our Environment Chapter 5
NCERT Solutions for Class 7 Social Science (Geography) – Our Environment Chapter-5
As students are promoted to higher sections, the course and curriculum also increase manifold. Gradually, there is an addition of new chapters, which form the base for higher classes. It is very essential for students to master every chapter in such a way that it helps them deal with chapters coming thereafter. However, with less time to cover a large amount of syllabus, students find it difficult to easily revise the chapters to prepare for the exams. Hence, we at Extramarks have come forward to help students by giving them complete access to NCERT Solutions for Class 7 Social Science (Geography) Chapter 5 – Our Environment.
NCERT Solutions for Class 7 Social Science (Geography) Chapter 5 – Water(include NCERT Solutions for Class 7 Social Science (Geography) Chapter)
NCERT Solutions for Class 7 Social Studies (Geography) Chapter 5 – Water
Candidates will get a complete understanding of Class 7 Geography Chapter 5 through the NCERT solutions that are provided on the official website of Extramarks. T Subject matter experts have written the solutions in simple language so that students can grasp the concepts. Below, detailed information on different topics included in Water Class 7 is given for the students’ reference. Distribution of Water Bodies
Water covers roughly three-fourths of the earth’s surface. The distribution of water bodies is given below in detail for a deeper understanding of the candidates.
| Water Bodies |
Quantity |
| Oceans (Saline Water) |
97.3 |
| Ice caps (Freshwater) |
02.0 |
| Ground Water (Freshwater) |
0.68 |
| Fresh Water Lake (Freshwater) |
0.009 |
| Inland seas and salt lakes (Freshwater)
|
0.009 |
| Atmosphere (Fresh water) |
0.0019 |
| Rivers |
0.0001 |
| Total |
100.00 |
Salinity:
It is defined as the amount of salt in grams present in 1000 grams of water. The average salinity of oceans is 35 parts per thousand.
Ocean Circulation:
A seashore is a beautiful place that can provide one with the required peace. The magic one gets by walking barefoot on the seashore is amazing. The presence of wet sand, the smell of salt in the air, and the music of waves make the environment on the seashore an absolute delight. The water found in lakes, ponds, and freshwater lakes is usually calm as compared to the ocean currents. The water present in the ocean keeps moving constantly. These movements that occur in the oceans can be divided into waves, tides, and currents.
Waves:
A wave is defined as the continuous rise and fall of water on the ocean’s surfaceThey are formed when the wind scrapes off the surface of the ocean. A strong wind current produces big waves as compared to weak ones.
Events such as earthquakes, volcanic eruptions, and underwater landslides can result in the shifting of large amounts of water, leading to the formation of a huge tidal wave known as a tsunami. It can be as high as 15 metres.
The largest tsunami experienced by Earth was 150 metres high. The waves of a tsunami can travel up to a speed of 700 km per hour.
Tides:
The continuous rise and fall in water found in the oceans twice a day are known as tides. High tides occur when the water covers the shore by rising to its highest level. Low tides occur when the waterfalls to a lower level and recede from the shore. The gravitational pull caused by the action of the sun and moon leads to the formation of tides.
- Spring tides: When the earth is closer to the moon, the water gets pulled under the gravitational force of the moon, causing a high tide. The sun, moon, and earth are all in the same line on new and full moon days, causing high tides. These tides are known as the spring tides.
- When the moon is in its first and last quarter, the gravitational pull of the sun and earth pulls the ocean water diagonally opposite, resulting in the formation of low tides. These tides are known as neap tides.
- Ocean Currents
The stream of water flowing constantly in the same direction is known as ocean currents. They can be warm or cold. In most cases, the warm ocean currents originate near the equator and move towards the poles. where the cold current carries the water from the poles of high latitudes to the lower latitudes.
The Labrador Ocean Current is a cold current, whereas
the Gulf Stream is a warm current. Ocean currents play a role in influencing the temperature of a particular area.
Key Features of NCERT Solutions for Class 6 Science Chapter 8
If you want to access NCERT Solutions, Extramarks can be your one-stop shop. Candidates can understand the concepts easily as simple language is used to explain the Class 7 Geography Chapter 5 Question Answers. They can access the required study materials from the official website of Extramarks.
The key features of the NCERT Class 7 Geography Chapter 5 notes are as follows:
- They can help the students in achieving good marks in the exams.
- Candidates can rely on the notes, as they were designed according to the latest CBSE and NCERT guidelines.
- Candidates will get clarity about the basic and advanced concepts through the study notes.