Hands on Weather - Heat

The video tutorial explores the role of heat in weather, plant growth, and daily life. It explains how the sun's angle affects seasonal temperatures, demonstrates the density differences between cold and warm liquids, and shows how heat causes materials to expand or contract. The tutorial also highlights heat's significance in natural processes and human activities, emphasizing its essential role in sustaining life on Earth.

What is the primary source of heat on Earth?

• Volcanoes

• The Moon

• Ocean Currents

• The Sun

Why is it generally warmer in summer compared to winter?

• The Earth rotates faster in summer.

• The Sun is higher in the sky, making its rays more direct.

• The Sun is closer to Earth in summer.

• There are fewer clouds in summer.

What happens to colder liquids when placed in warmer liquids?

• They rise to the top.

• They evaporate quickly.

• They mix evenly.

• They sink because they are denser.

What causes a balloon to expand when placed in warm water?

• The balloon absorbs water.

• The water pressure increases.

• The air inside the balloon expands as it warms.

• The balloon material becomes more elastic.

How do hot air balloons float?

• They are pushed by strong winds.

• They have a special coating that repels gravity.

• They are filled with hot air, which is less dense.

• They are filled with helium.