How do people predict the weather?

The science of weather prediction or forecasting is called meteorology. A person who predicts the weather is a meteorologist.

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A meteorologist will collect data from a range of sources to show what the current weather conditions are. They then predict what will happen based on what has happened in the past, when the conditions were the same or similar.

Among the type of data collected is air pressure, temperature, wind speed and direction. This data is collected by weather stations which are dotted around the country.

A more in depth answer from Weather Wiz Kids

A video explanation:

Where can you find quicksand?

You can find quicksand in many different places. Quicksand is sand that has been mixed with so much water it forms a mixture that is in between a liquid and a solid. It does not actually suck you down, it is just so soft that it can’t support your weight, so you sink into it.

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Learn how to make your own quicksand with this link

How do birds fly?

A bird’s body is specially adapted to help it fly. The most important body parts are the wings, but there are other features of a bird’s body that helps it fly.

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A bird has hollow bones to make them light. They also have powerful flight muscles and a strong heart and lungs to provide the oxygen needed to power these muscles.

A bird’s wing works in similar way to an aircraft’s wing. They are a particular shape which is called an aerofoil. Because of the shape of the aerofoil, air flows over and under the wing at different speeds. Slower air flowing under the wing produces lift. While the faster air flowing over the wing produces drag.

When a bird flaps its wings the rotation of the wing with the lift propels the bird forward in flight. This is called thrust.

 

Photo credit: Milan Bruchter via 123rf.com