Grade 6 Tamkeen Review 2 June 2023

• Livestock. mining and agriculture

• Industry

• Thermoelectric power

• irrigation of agricultural crops

• Recycling plastic drinking bottles.

• Taking longer showers.

• Reducing the use of resources.

• Properly disposing of waste products.

• B

• C

• A

• D

• D

• C

• B

• A

• It forms when nitrogen and sulfur gas react in the atmosphere,

• Acid precipitation can pollute air and soil.

• Acid precipitation can harm fish and animals.

• The pH of acid precipitation is higher than normal rainfalls.

• creating a geographic barrier

• creating a continuous flow of water

• increase river flow

• decrease the rate of erosion along river banks

• CFCs

• Photochemical Smog

• Acid precipitation

• Volcanic Ash

• decrease in the rate of photosynthesis

• extinction of species

• loss of animal habitat

• less carbon dioxide remains in the air

• N₂0 -> CH₄ -> CO₂

• CH₄ -> N₂0 -> CO₂

• CO₂ -> N₂0 -> CH₄

• CO₂ ->CH₄ -> N₂0