Open App

Class 7 Exam > Class 7 Videos > Social Studies (SST) Class 7 (Old NCERT) > Tides and Waves

Tides and Waves Video Lecture | Social Studies (SST) Class 7 (Old NCERT)

FAQs on Tides and Waves Video Lecture - Social Studies (SST) Class 7 (Old NCERT)

1. What causes tides in the ocean?

Ans.Tides are caused primarily by the gravitational pull of the moon and the sun on the Earth's oceans. As the moon orbits the Earth, its gravitational force pulls water towards it, creating a bulge or high tide. The areas of the Earth that are not under this bulge experience low tide. The sun also plays a role, but its effect is less than that of the moon due to its greater distance from Earth.

2. How often do tides occur?

Ans.Tides typically occur twice a day in most coastal areas, resulting in two high tides and two low tides approximately every 24 hours. However, the specific timing and height of tides can vary based on the lunar cycle, weather conditions, and geographical features of the shoreline.

3. What is the difference between waves and tides?

Ans.Waves are created by the wind blowing across the surface of the water, generating a series of rhythmic movements in the ocean. Tides, on the other hand, are long-term changes in water level caused by the gravitational forces of the moon and sun. While waves are generally short-term phenomena, tides can last for several hours and are predictable based on lunar cycles.

4. Why do tides vary in height?

Ans.Tide heights can vary due to several factors, including the alignment of the sun and moon, the shape of the coastline, and local weather conditions. When the sun, moon, and Earth align (during full moons and new moons), higher high tides and lower low tides occur, known as spring tides. Conversely, when the sun and moon are at right angles relative to Earth, neap tides occur, resulting in lower high tides and higher low tides.

5. How do tides affect marine life?

Ans.Tides play a crucial role in marine ecosystems by influencing feeding, reproduction, and migration patterns of various marine species. Many organisms, such as crabs and fish, rely on the changing tides to access feeding grounds or breeding areas. Additionally, tidal movements help circulate nutrients and oxygen in coastal waters, supporting diverse marine life.

About this Video

1.3K Views

4.89/5 Rating

Sep 08, 2025 Last updated

Related Exams

Class 7 Grade 7

Video Description: Tides and Waves for Class 7 2025 is part of Social Studies (SST) Class 7 (Old NCERT) preparation. The notes and questions for Tides and Waves have been prepared according to the Class 7 exam syllabus. Information about Tides and Waves covers all important topics for Class 7 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Tides and Waves.

Introduction of Tides and Waves in English is available as part of our Social Studies (SST) Class 7 (Old NCERT) for Class 7 & Tides and Waves in Hindi for Social Studies (SST) Class 7 (Old NCERT) course. Download more important topics related with notes, lectures and mock test series for Class 7 Exam by signing up for free.

Description

Video Lecture & Questions for Tides and Waves Video Lecture | Social Studies (SST) Class 7 (Old NCERT) - Class 7 full syllabus preparation | Free video for Class 7 exam to prepare for Social Studies (SST) Class 7 (Old NCERT).

Information about Tides and Waves

Here you can find the meaning of Tides and Waves defined & explained in the simplest way possible. Besides explaining types of Tides and Waves theory, EduRev gives you an ample number of questions to practice Tides and Waves tests, examples and also practice Class 7 tests.

	Social Studies (SST) Class 7 (Old NCERT) 63 videos\|552 docs\|46 tests

Social Studies (SST) Class 7 (Old NCERT)

63 videos|552 docs|46 tests

Join Course for Free

Explore Courses for Class 7 exam

MCQs

video lectures

Important questions

Semester Notes