Modern rain gauges are self recording and automatically measure the rain in 5 minute intervals. This rain gauge is solar powered for working out in rural areas.
Freezing rain is super cooled rain that freezes on impact. Helped along by the fact that the ground is also below freezing. This rare event can be costly and create a lot of damage. Pulling down electricity wires and telephone wires and making roads extremely dangerous is the biggest headache caused by freezing rain. Why does it rain? Beaufort Scale. Severe weather. Weather words.
Weather diagrams. Weather videos. Weather - Wow! How it rains. The sun heats up the air. Warm air rises. As the air rises, it cools. Map skills. Definition of rain. Synonyms for rain. Heavy rainfall. What is deforestation?
What are volcanoes? Acids can corrode some natural materials. Acids have pH levels lower than 7. Acid rain can be manmade or occur naturally. The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit.
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If no button appears, you cannot download or save the media. Text on this page is printable and can be used according to our Terms of Service. Any interactives on this page can only be played while you are visiting our website. You cannot download interactives. Freshwater is a precious resource on the Earth's surface.
It is also home to many diverse fish, plant, and crustacean species. The habitats that freshwater ecosystems provide consist of lakes, rivers, ponds, wetlands, streams, and springs.
Use these classroom resources to help students explore and learn about these places. Weather is the state of the atmosphere, including temperature, atmospheric pressure, wind, humidity, precipitation, and cloud cover. It differs from climate, which is all weather conditions for a particular location averaged over about 30 years. Weather is influenced by latitude, altitude, and local and regional geography.
It impacts the way people dress each day and the types of structures built. Explore weather and its impacts with this curated collection of classroom resources. Precipitation is any liquid or frozen water that forms in the atmosphere and falls to the Earth.
It is one of the three main steps of the global water cycle. Precipitation is any type of water that forms in the Earth's atmosphere and then drops onto the surface of the Earth. Water vapor, droplets of water suspended in the air, builds up in the Earth's atmosphere before precipitating. Join our community of educators and receive the latest information on National Geographic's resources for you and your students.
Skip to content. Twitter Facebook Pinterest Google Classroom. Encyclopedic Entry Vocabulary. Some animals avoid the rain. Talk about beating around the bush! I guess that's what you'd expect from someone who's been a college professor for three decades. But we're almost there. In order for it to rain, the air must be saturated: The relative humidity must be percent, or very close to it. How does that happen? By lowering the temperature or bringing in more water vapor.
But if we just bring in more water vapor and nothing else happens, we're still just stuck with microscopic droplets. So let's focus on lowering the temperature. The temperature can be lowered by a colder wind, possibly coming from the north. But those north winds contain less water vapor, so the temperature may lower, but the humidity could remain the same. How hard can it rain? Very hard! On June 22, , 12 inches of rain fell in just 42 minutes over Holt, Missouri.
That is about 25 percent of the normal annual rainfall for Holt, and it happened in less than an hour. On July 4, , 1. Flash-flooding killed 80 people. More than people were swept away by the waters. In Calama, Chile, no rain fell for years, then, on February 10, , the skies opened up during the mid-afternoon. Catastrophic floods and mudslides swept through that region.
The wettest inhabited location in the world is Buenaventura, Colombia, where an average of The driest inhabited location is Aswan, Egypt, where the average annual rainfall comes to just.
The temperature could also fall if a column of air rises. As an air column rises, there is less atmosphere around it, which reduces the pressure outside the column.
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