MEDIA PEMBELAJARAN SIKLUS AIR

Summary

This educational video explains the water cycle, highlighting that 71% of the Earth's surface is covered by water, with 97% being saltwater. Only 3% is freshwater, primarily stored as ice in polar regions. The cycle consists of evaporation, cloud formation, and precipitation. Water from oceans, rivers, and lakes evaporates due to solar heat, while plants contribute to this process through transpiration. As water vapor rises, it cools and condenses to form clouds, which eventually release rain. This continuous cycle is essential for replenishing the Earth's freshwater supply and fulfilling various human needs.

Takeaways

• 🌍 Approximately 71% of the Earth's surface is covered by water.
• 🌊 Out of the total water, 97% is saltwater found in oceans.
• 💧 Only 3% of the Earth's water is freshwater, with 2% being locked in ice at the poles.
• 🏞 The remaining 1% of freshwater is available in lakes, rivers, and groundwater for human use.
• 🚿 Humans use water for various needs, including bathing, drinking, washing, and irrigation.
• ♻️ Despite continuous usage, the Earth's water supply does not deplete due to the water cycle.
• 🌬️ The water cycle is the continuous circulation of water from the Earth to the atmosphere and back.
• ☀️ The water cycle consists of three main processes: evaporation, condensation, and precipitation.
• 🌱 Evaporation occurs when water from oceans, rivers, and lakes is heated by the sun.
• 🌧️ Precipitation occurs when condensed water droplets in clouds fall back to the Earth as rain.

Q & A

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

Approximately 71% of the Earth's surface is covered by water.

What is the composition of the Earth's water?

Of the total water, 97% is saline water found in the oceans, while only 3% is freshwater.

Where is the majority of Earth's freshwater located?

About 2% of the freshwater is locked in ice at the polar regions, and the remaining freshwater is found in lakes, rivers, and groundwater.

What are some of the uses of water by humans?

Humans use water for various needs, including bathing, drinking, washing, watering plants, and other essential activities.

Will Earth's water supply run out?

Despite continuous use, the water on Earth does not deplete because of the water cycle.

What is the water cycle?

The water cycle is the continuous circulation of water from the Earth to the atmosphere and back again.

What are the three main stages of the water cycle?

The water cycle consists of three main stages: evaporation, cloud formation, and precipitation.

How does evaporation occur?

Evaporation occurs when water from oceans, rivers, and lakes heats up due to sunlight and transforms into vapor.

What is transpiration in relation to the water cycle?

Transpiration is the process where plants release water vapor into the atmosphere due to the heat from the sun.

What happens to water vapor in the atmosphere?

Water vapor rises and cools to form clouds through a process called condensation, and then falls back to Earth as precipitation, such as rain.

What is precipitation?

Precipitation is the process where water droplets in clouds become heavy and fall to the ground, primarily as rain.

How does the water cycle contribute to environmental balance?

The water cycle ensures that water is continually circulated through different forms and locations, helping to maintain ecological balance.