Ozone depletion

Where is ozone layer?

• Below the earth's surface

• Above 25-50 kms above the earths surface

• Above 10 kms above earths surface

• In the earths's crust

Ultra violet rays can damage ________

• Heart

• Lungs

• Eyes and Skin

• Brain

Ozone layer protects us from

• Acid rain
• Global warming
• Tornadoes
• UV radiation

How does Ozone layer protect us from UV rays?

• Absorbs UV rays

• Emits heat from sun

• Absorbs Infrared rays

• Absorbs heat from sun

What causes Ozone hole?

• Release of chlorofluorocarbons (CFCs)

• Increased volcanic activity
• Deforestation and land degradation
• Excessive use of renewable energy sources

What does hole in the ozone mean?

• A region of increased ozone in the stratosphere
• A region of depleted ozone in the troposphere
• A region of increased ozone in the troposphere
• A region of depleted ozone in the stratosphere

Identify the substances that release CFC?

• Medications, food additives, and clothing dyes
• Paints, cleaning products, and pesticides
• Refrigerants, solvents, and aerosol propellants
• Plastics, glass, and paper

How do CFC react with ozone?

• CFCs react with ozone by absorbing it completely.
• CFCs react with ozone by creating a protective layer around it.
• CFCs react with ozone by breakdown of ozone molecules.

• CFCs react with ozone by increasing its concentration in the atmosphere.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5