1. Fill in avalanche, tornado, pollution, endangered, hail 1. The problem of air…. exists in all industrial countries.

2. Some plants and animals that are in danger of becoming extinct are … species.

3. A violent… happened in Armenia in 1988.

4. An …fell down the mountain. Fortunately, it didn’t touch the climbers’ camp.

5. …is a piece of ice.

1. The problem of air pollution exists in all industrial countries.
Explanation: Air pollution refers to the presence of harmful substances in the air, such as gases, particulate matter, and chemicals, which can negatively impact human health and the environment. It is a significant problem in industrialized countries where there are high levels of emissions from factories, vehicles, and other sources.

2. Some plants and animals that are in danger of becoming extinct are endangered species.
Explanation: Endangered species are those that are at risk of dying out completely. This can be due to various factors such as habitat loss, pollution, overhunting, or climate change. Conservation efforts are made to protect endangered species and preserve biodiversity.

3. A violent tornado happened in Armenia in 1988.
Explanation: A tornado is a rapidly rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud. It is often characterized by a visible funnel-shaped cloud and can cause significant damage in its path. In this case, a violent tornado occurred in Armenia, meaning it was particularly intense and destructive.

4. An avalanche fell down the mountain. Fortunately, it didn’t touch the climbers’ camp.
Explanation: An avalanche is a rapid flow of snow down a steep slope. It can be triggered by various factors such as weather conditions, slope angle, and the presence of loose snow. Avalanches pose a significant risk to people in mountainous areas, especially climbers and skiers. In this scenario, an avalanche occurred but luckily did not reach the camp where the climbers were located.

5. Hail is a piece of ice.
Explanation: Hail is a type of frozen precipitation that forms within thunderstorm clouds. It consists of icy pellets or balls that are typically larger than 5 millimeters in diameter. Hailstones form as water droplets freeze and are carried upward by strong updrafts in the thunderstorm. They can cause damage to buildings, crops, and vehicles when they fall to the ground.