Daily 5 word work weather.

• What  wind
• Wind is the flow of gases, here on Earth it refers to the movement of air.

• It is caused by differences in air pressure. Air rushes from high pressure areas to lower ones.

Facts about Rain.

Rain falls from clouds in the sky in the form of water droplets, this is called precipitation.

Water can also fall from the sky in the form of hail, sleet or snow. Rain is an important part of the water cycle. Learn how it works with our page explaining the water cycle for kids. Rain occurs on other planets in our Solar System but it is different to the rain we experience here on Earth. For example, rain on Venus is made of sulfuric acid and due to the intense heat it evaporates before it even reaches the surface! Weather radar is used to detect and monitor rain. Rain gauges are use to measure the amount of rain over a certain period of time. Try making your own rain gauge. The highest amount of rainfall ever recorded in 24 hours is 182.5 centimetres (71.9 inches) in Foc-Foc, La Réunion. This occurred during tropical cyclone Denise on January 8, 1966. The highest amount of rainfall ever recorded in one year is 25.4 meters (1000 inches) in Cherrapunji, India. Antarctica is the driest continent on Earth. Heavy rain can cause flooding and landslides. Rain allows us to create electricity through hydropower. Plants need water in order to survive, they receive much of this water from rain. Forests that experience high levels of rainfall are called rainforests. Rain with high levels of acid (a low pH) is called acid rain. Caused by the release of sulphur dioxide and nitrogen oxides into the air (often from factories and power stations), it can be harmful to plants and animals.

Facts about Clouds.

• A cloud is a large group of tiny water droplets that we can see in the air.
• Clouds are formed when water on Earth evaporates into the sky and condenses high up in the cooler air. Learn more about the water cycle.
• Rain, snow, sleet and hail falling from clouds is called precipitation.
• Most clouds form in the troposphere (the lowest part of Earth’s atmosphere) but occasionally they are observed as high as the stratosphere or mesosphere.
• Clouds can contain millions of tons of water.
• There are a range of different types of clouds, the main types include stratus, cumulus and cirrus.
• Stratus clouds are flat and featureless, appearing as layered sheets.
• Cumulus clouds are puffy, like cotton floating in the sky.
• Cirrus clouds are thin and wispy, appearing high in the sky.
• There are many variations of these 3 main cloud types including stratocumulus, altostratus, altocumulus, cirrostratus and cirrocumulus.
• Fog is stratus type of cloud that appears very close to the ground.
• Clouds can also be made of other chemicals.
• Other planets in our Solar System have clouds. Venus has thick clouds of sulfur-dioxide
• while Jupiter and Saturn have clouds of ammonia.
• Check out this cloud basics video for more

Facts about Lightening.

Cloud-to-ground lightning bolts are a common phenomenon—about 100 strike Earth’s surface every single second—yet their power is extraordinary. Each bolt can contain up to one billion volts of electricity.

This enormous electrical discharge is caused by an imbalance between positive and negative charges. During a storm, colliding particles of rain, ice, or snow increase this imbalance and often negatively charge the lower reaches of storm clouds. Objects on the ground, like steeples, trees, and the Earth itself, become positively charged—creating an imbalance that nature seeks to remedy by passing current between the two charges.

A step-like series of negative charges, called a stepped leader, works its way incrementally downward from the bottom of a storm cloud toward the Earth. Each of these segments is about 150 feet (46 meters) long. When the lowermost step comes within 150 feet (46 meters) of a positively charged object it is met by a climbing surge of positive electricity, called a streamer, which can rise up through a building, a tree, or even a person. The process forms a channel through which electricity is transferred as lightning.

Some types of lightning, including the most common types, never leave the clouds but travel between differently charged areas within or between clouds. Other rare forms can be sparked by extreme forest fires, volcanic eruptions, and snowstorms. Ball lightning, a small, charged sphere that floats, glows, and bounces along oblivious to the laws of gravity or physics, still puzzles scientists.

Lightning is extremely hot—a flash can heat the air around it to temperatures five times hotter than the sun’s surface. This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash.

Lightning is not only spectacular, it’s dangerous. About 2,000 people are killed worldwide by lightning each year. Hundreds more survive strikes but suffer from a variety of lasting symptoms, including memory loss, dizziness, weakness, numbness, and other life-altering ailments.

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