Exploring Our Earth

The video tutorial introduces students to Earth's features, focusing on its surface, composition, and the three main components: lithosphere, hydrosphere, and atmosphere. It explains the diverse landforms found in the lithosphere, the vast water bodies of the hydrosphere, and the layers of the atmosphere. The importance of the ozone layer in protecting life on Earth is also highlighted. The tutorial aims to provide a comprehensive understanding of Earth's structure and the significance of its natural components.

What is the approximate surface area of Earth?

• 510 million km²

• 100 million km²

• 1 billion km²

• 10 million km²

Which of the following is NOT a feature of Earth's surface?

• Plateau

• Mountain

• Ocean

• Valley

What is a plateau?

• A steep hill

• A large body of water

• A low area between hills

• A flat area higher than the surrounding land

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

• 60%

• 50%

• 70%

• 80%

Which of the following is a characteristic of a lake?

• It flows continuously

• It is larger than an ocean

• It is surrounded by land

• It has no boundaries

What is the primary function of the ozone layer?

• To block harmful UV rays

• To trap heat

• To provide oxygen

• To produce rain

Which gas is essential for plants to produce energy?

• Carbon Dioxide

• Nitrogen

• Helium

• Oxygen

Which layer of the atmosphere is closest to Earth?

• Stratosphere

• Mesosphere

• Exosphere

• Troposphere

What is the main component of Earth's atmosphere?

• Hydrogen

• Nitrogen

• Oxygen

• Carbon Dioxide

What could happen if the ozone layer is damaged?

• Higher UV radiation reaching Earth

• Decrease in global temperatures

• More oxygen in the atmosphere

• Increased rainfall