Earth's Atmosphere and Landforms

The video tutorial explains the composition of Earth's surface, highlighting that 71% is water found in oceans, seas, rivers, and lakes, while 29% is land with various geographical features. It describes the atmosphere as a layer of gases essential for life and explains why the sky appears blue due to light scattering. The concept of the horizon, where the sky and Earth seem to meet, is clarified, along with the definition of coastal areas where land meets the sea.

What percentage of the Earth's surface is covered by water?

• 71%

• 90%

• 50%

• 29%

Which of the following is NOT a type of landform mentioned in the video?

• Oceans

• Mountains

• Deserts

• Valleys

What is the layer of air surrounding the Earth called?

• Lithosphere

• Atmosphere

• Stratosphere

• Biosphere

How high does the Earth's atmosphere extend upwards?

• 100 km

• 1000 km

• 500 km

• 200 km

Why does the sky appear blue?

• Due to the scattering of sunlight by dust particles and water

• Because of the reflection of the ocean

• Due to the presence of blue gases

• Because it is actually blue

What is the term for the point where the sky and Earth appear to meet?

• Plateau

• Horizon

• Coast

• Valley

What is the place called where land and sea meet?

• Plateau

• Coast

• Horizon

• Valley

What do we call areas where many people live on the coast?

• Urban areas

• Rural areas

• Coastal areas

• Mountainous areas