Weather Weather | Science Olympiad for Class 1 PDF Download

Our Earth is surrounded by a layer of air which is called atmosphere. Sometimes the air becomes hot and sometimes it becomes cold. This change in atmosphere is known as weather. It keeps changing daily and even from hour to hour.

Types of Weather

• Rainy 
• Stormy
• Cloudy 
• Partly Cloudy
• Sunny 
• Snowy
• Warm Temperature 
• Cold Temperature
• Hot Temperature 
• Freezing Temperature

The Sky

We live on Earth and see sun, moon and stars in the sky. They are called heavenly bodies. The sun is a star, the earth is a planet and moon is a natural satellite. All the heavenly bodies in space are combined together to make a universe.

The Sun

We see the sun in the sky. The sun is a big ball of fire. It gives us light and heat. Plants need sunlight to live and grow. The sun rises in the east and sets in the west. The position of the sun affects the size of a shadow. A person or object blocks more light when the sun is low in the sky. More blocked light makes shadows longer. Less light is blocked when the sun is high in the sky. This makes shadows shorter.

Properties of Shadow

• They are always dark in colour.
• They are formed opposite to the source of light.
• They are formed when an opaque object comes between the source of light and the screen.

The Moon and the Stars

At night, we see the moon shining brightly. We also see many stars twinkling in the sky. The moon moves around the Earth. There is no life on the moon.
We know that the moon is the natural satellite of the Earth. The moon doesn’t emit its own light. It reflects the light of the sun. As the moon orbits or circles the Earth, the phase changes.
The different phases of the moon starting from the new moon are:

• New moon
• Waxing Crescent
• First quarter
• Waxing Gibbous
• Full
• Waning Gibbous
• Third quarter
• Waning Crescent
• Full moon