This PSEB 7th Class Science Notes Chapter 7 Weather, Climate and Adaptations of Animals to Climate will help you in revision during exams.
PSEB 7th Class Science Notes Chapter 7 Weather, Climate and Adaptations of Animals to Climate
→ The weather of a place changes day by day and week by week.
→ The weather depends on temperature, humidity, and rainfall.
→ Humidity is a measure of water vapour in the air.
→ Indian Meteorological Department of weather forecasting daily collects statistical data of heat, wind speed at various places and makes weather predictions.
→ Atmospheric conditions in terms of temperature, humidity, rainfall, wind speed, etc. of a place are called the weather of that place.
→ The weather can change in an instant.
→ Factors on which the weather depends, are called elements of weather.
→ Special high-low thermometers are used to measure the temperature.
→ The highest temperature of the day is usually in the afternoon and the lowest is normal usually in the morning.
→ All changes in the weather are caused by the sun.
→ In winters, the length of the day is shorter and the night is earlier.
→ The length of the weather of a place is based on the data collected at that place is called the climate of that place.
→ The climate of different places is different. It changes from hot and dry to hot and humid.
→ Energy reflected and absorbed by the earth’s surface, ocean and atmosphere play important roles in determining weather at any place.
→ Climate has a great impact on living things.
→ Animals are adapted to the conditions in which they live.
→ The Polar Regions are located near the poles, such as the North Pole and the South Pole.
→ Canada, Greenland, Iceland, Norway, Sweden, Finland and Alaska, and Siberian areas of Russia in America, are the Polar Regions
→ Tropical rainforests are found in India, Malaysia, Indonesia, Brazil, the Republic of Congo, Kenya, Uganda, and Nigeria. The Polar Regions have a cold climate.
→ Rainfall is measured by an instrument called the rain gauge.
→ Penguins and polar bears live in Polar Regions.
→ The Polar Regions are covered with white ice.
→ The white hairs on the polar bear’s body help protect it and catch prey.
→ Penguins are well-known animals found in Polar Regions. It is also white and merges well with the background.
→ In addition to polar bears and penguins, many other animals are found in Polar Regions.
→ Many fishes can live in cold water.
→ The climate of the Subtropical Regions is generally warmer, as these areas are closer to the equator.
→ Temperatures in these regions vary from 15°C to 40°C.
→ In areas near the equator, the length of night and day are approximately equal throughout the year.
→ Weather: Everyday changes in the atmosphere in terms of temperature, humidity, rainfall, wind speed, etc., is called the weather of that place.
→ Climate: The average weather pattern taken over a long time, say 25 years is called the climate of the place.
→ Adaptation: The special characteristics of plants and organisms, that is, the nature that enables them to live in a habitat, is called adaptation.
→ Migration: Moving from one place to another to avoid harsh climatic conditions by birds and animals is called migration.