CBSE Class 7 Science Revision Notes Chapter 7 – Weather, Climate, and Adaptation of Animals to Climate
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Class 7 Science Chapter 7 Notes provided by Extramarks provide comprehensive study material to students preparing for the exams. In this chapter, students will learn the concepts of weather and climate, their differences, their effects on migration and adaptation of birds and animals, and finally the Important Questions at the end.
Class 7 Science Chapter 7 Notes notes are prepared by subject matter experts as per the CBSE Syllabus and its latest guidelines. These notes cover all of the key points mentioned in the chapter. Therefore, students can revise them all in a short time before the exam. Chapter 7 Science Class 7 Notes are easily accessible from the Extramarks website.
Revision Notes For CBSE Class 7 Science Chapter 7
Access Class 7 Science Chapter 7 – Weather, Climate and Adaptations to Climate Notes
Migration
- Migration can be defined as a large-scale movement of birds and animals from one region to another to find a climate suitable for living, breeding, and getting sustenance.
- The seasonal migration of birds and animals happens from colder regions to warmer regions.
- During the daylight, birds are guided by the sun; but at night they follow the stars to carry on their journey.
- A Siberian crane migrates every year from the cold regions of Siberia to India.
Class 7 Chapter 7 Science Notes
Extramarks provides revision notes for the chapter Weather, Climate and Adaptations of Animals to Climate to help students enhance their exam preparation. They can easily access updated study materials from the Extramarks website at their convenience. Subject matter experts prepare these notes in pointers. This makes them concise and easy to understand. These notes explain the chapter in a structured manner, so students can understand the flow between two given concepts.
Weather and Climate Class 7 Revision Notes
The term “weather” refers to the state of atmospheric elements in a certain place at a certain period of time. The condition of the weather fluctuates depending on a change in the atmospheric elements like temperature, humidity, rainfall, wind pressure, etc. of that given place.
Conditions Affecting Weather
The weather of a region depends on multiple factors. These are:
- Temperature
- Humidity in atmosphere
- Wind or atmospheric pressure in that place
- Rainfall
- Cloudiness
- Visibility of the horizon
- Separation of air masses
Climate
The climate of a place refers to the average weather pattern of that given place over a long period of time. If the average temperature of a place is usually hot then it is called a hot place. If scanty rainfall is also added to the prevailing weather conditions, the climate of that place is considered hot and arid as well.
Some of the determining factors of the climate of a place include the geographical location of that place, its height above sea level, and its overall topography.
Difference Between Weather And Climate – Table Will Be Updated Soon.
Clouds
One of the key elements that affect the weather of a location is the presence of clouds. Clouds are made up of small droplets of water floating in the atmosphere freely. They are formed through convection.
The process of cloud formation is as follows:
- During the day, the air on the earth’s surface becomes hot and light. The warm and light air moves in the upward direction only to be transformed into water droplets after reaching a particular height, where the temperature of the atmosphere drops significantly.
- These water droplets take a more condensed form and merge to form a cloud.
- A cloud, therefore, is nothing but a collection of billions of water droplets floating in the air.
- The water that goes up to the higher sky comes back to the earth in the form of rainfall.
Rain Gauge
A rain gauge is an instrument used for measuring the amount of rainfall at a given place. It has a funnel-like structure at the mouth to collect the rainwater and a cylindrical body to store it. The measuring scale of a rain gauge is drawn on its body.
Adaptation
Tropical Rainforests
- Tropical rainforests are found in the regions around the equator, where the climate remains extremely hot throughout the year.
- In winters, the temperature goes down to 15⁰ C, whereas in summers, the temperature rises over 40⁰ C.
Desert
The climate of these regions is extremely hot and arid because of continuous exposure to sunlight and minimum rainfall.
Animal Adaptation
- The ability to adapt to hostile climatic conditions is the key to survival on earth.
- For example, polar bears have evolved to have long white fur to protect themselves from predators. The thick layer of fat under their skin helps them survive in the icy polar regions.
- All the species across the globe have developed certain features to survive in their environmental conditions.