Page 73 - Ripples SCIENCE 7 - TEJPUR Edition 2024 Answer Key

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8 Weather, Climate and Adaptations

Chapter in a Nutshell

v The day-to-day changes in weather are influenced by various elements of weather.
v The main factor which is responsible for all the changes in the weather is the Sun.
v The other factors which influence weather are temperature, rainfall, humidity and winds.

v Temperature can be defined as the measure of the degree of hotness or coldness of an
object.

v The temperature of a place is measured by a special thermometer called the maximum and
minimum thermometer.
v Temperature varies greatly at different regions of the Earth due to unequal amount of heat

received from the Sun.
v The quantity of rain that falls in a particular region, in a given time is termed as rainfall.

v Rain is measured in inches or millimeters using a rain gauge.
v The amount of moisture present in the air is the humidity of the place.
v Humidity is measured using a hygrometer.

v Weather is influenced by two factors – wind speed and wind direction.
v Wind speed tells us how fast the wind is blowing.

v Wind speed can be measured by an anemometer or by the Beaufort scale.
v The wind direction indicates the direction from which the wind blows.
v Wind direction is measured by a wind vane.

v Climate is the average weather conditions in a given area over a longer period of time.
v The main factors that influence the climate of the Earth are the Earth’s tilt and its distance

from the Sun.
v The climate of a place has a great effect on the flora and fauna of that place.

v Adaptation is a process where an animal develops features better suited to survive in its
habitat.

v Camouflage is a defence mechanism that helps animals blend in with their surroundings.
Exercise

A. Tick (3) the correct answer.

1. Many tropical animals have adaptations wherein their skin colour blends with the
surroundings to hide from predators. This feature is called .................. .

(a) Camouflage (b) Aestivation (c) Blending (d) Hibernating

Ans. (a)

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