Unit 4(Nature's Miracles) Chapter-1 Air

What is the main reason Earth is called the Goldilocks planet?

• Because it has a large variety of plants and animals
• Because its conditions are just right to support life
• Because it is covered in gold dust
• Because it is the only planet in the Solar System

What makes Earth different from other planets in the Solar System?

• Its large size
• Its abundance of water in liquid form and oxygen-rich atmosphere
• Its proximity to the Sun
• Its colorful appearance

What is the primary function of Earth's atmosphere?

• To provide a colorful view of the sky
• To protect Earth from asteroids
• To provide oxygen for plants
• To protect living beings by surrounding the planet

The Earth's atmosphere is divided into layers based on:

• The distance from the Sun
• The composition of gases
• Temperature and composition
• Altitude from sea level

In which atmospheric layer do clouds form and weather conditions occur?

• Troposphere
• Stratosphere
• Mesosphere
• Thermosphere

Which layer of the atmosphere contains the ozone layer?

• Troposphere
• Stratosphere
• Mesosphere
• Thermosphere

What is the role of the ozone layer in the stratosphere?

• Absorbing harmful UV rays from the Sun
• Generating heat for the atmosphere
• Creating colorful sunsets
• Producing oxygen for breathing

Which gases are responsible for causing holes in the ozone layer?

• Oxygen and nitrogen
• Carbon dioxide and methane
• Hydrogen and helium
• Chlorofluorocarbons (CFCs)

In which atmospheric layer do shooting stars occur?

• Troposphere
• Stratosphere
• Mesosphere
• Thermosphere

Which layer of the atmosphere is the coldest?

• Troposphere
• Stratosphere
• Mesosphere
• Thermosphere