Sun is a huge sphere of hot gases burning at a very high temperature. The distance of the sun from us is very much. Even then the energy sent out by the sun is very large in amount. So, sun is the primary source of energy that causes change in the weather. Energy absorbed and reflected by the Earth's surface, oceans and atmosphere play an important role in determining the weather at any place.

The mean temperature for a given month is found in two steps:
(i) First we find the average of the temperatures recorded during the month.
(ii) Second we calculate the average of such average temperature over many years. That gives the mean temperature.

Polar regions present an extreme climate because:
(i)These regions are covered with snow and it is very cold for most part of the year.
(ii) For six months the sun does not set at the poles while for another six months it does not rise.
(iii) In winters, the temperature can be as low as - 37°C.

(i) White fur.
(ii) Two layers of fur, layer of fat under skin and presence of small ears.
(iii) They rest often to avoid getting overheated and go for swimming.

Weather data of a week:

(Rainfall may not be recorded for all the days since it may not rain everyday. Leave the space for rainfall blank if the data 15 not available.)

The animals that live in tropical rainforests are herbivorous that are able to eat the vegetation, rich in rainforest.
Most of the tropical rainforest animals walk on the land or are adapted to live on trees. The animals living in rainforest have good eyesight and hearing capacity to catch their prey as well as to protect themselves from predators.

All the changes in a weather are caused due to the sun. The sun is a huge sphere of hot gases at a very high temperature. The sun provides light and heat on the earth. The energy from the sun is a absorbed and reflected by the earth's surface, oceans, etc. It plays an important role in determining the weather of any place.
When the water vapour rises high in the atmosphere, it causes rain to come down on the earth. Also the hot air develops high pressure and low pressure areas cause windy weather.

Adaptive features of a polar bear that help in keeping it warm are as follows
(i) They have two thick layers of white fur.
(ii) They have layer of fat under their skin.

The factors that affect the climate of a place are
(i) Temperature zone or latitude, i.e. amount of sunshine it receives or distance from equator.
(ii) Distance from sea.
(iii) Altitude or height above the sea level.
(iv) Humidity or the presence of moisture in air.
(v) Amount of precipitation received or rainfall.

Polar regions Polar bear/penguin/ reindeer/musk oxen.
Tropical rainforests Red-eyed frog /elephants lion-tailed macaque/ lion and tiger.

Elephant living in the tropical rainforest has adapted to the conditions of rainforests in many remarkable ways. It uses its trunk as a nose because of which it has a strong sense of smell. The trunk also helps in picking up food. Its tusks are modified teeth. These can tear the bark of trees that elephant loves to eat. Large ears of the elephant help it to hear even very soft sound. They also help the elephant to keep cool in the hot and humid climate of the tropical rainforest.

Climate has a profound effect on all living organisms. Animals are adapted to survive in the conditions in which they live. Animals living in very cold and hot climate must possess special features to protect themselves against the extreme cold or heat, e.g. animals living in polar regions have adaptations such as white fur, strong sense of smell, thick skin, lot of fats to protect it from cold, wide, large paws for swimming, etc.

Weather changes frequently in a very short period of time.

The maximum temperature of the day occurs generally in the afternoon while the minimum temperature occurs generally in the early morning.

The elements that determine the weather of a place are temperature, humidity, rainfall, wind speed, etc.