Question

find out information about -:
1) Red tides
2) Fire whirl
3) Penitentes
4) Moving Stone


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Answer 1

• Red tide is a phenomenon caused by algal blooms (Wikipedia definition) during which algae become so numerous that they discolor coastal waters (hence the name "red tide"). The algal bloom may also deplete oxygen in the waters and/or release toxins that may cause illness in humans and other animals.

• A fire whirl or fire devil, is a whirlwind induced by a fire and often composed of flame or ash. These start with a whirl of wind, often made visible by smoke, and may occur when intense rising heat and turbulent wind conditions combine to form whirling eddies of air.

• Penitentes, or nieves penitentes (Spanish for "penitent-shaped snows"), are snow formations found at high altitudes. ... These spires of snow and ice grow over all glaciated and snow-covered areas in the Dry Andes above 4,000 metres (13,000 ft). They range in length from a few centimetres to over 5 metres (16 ft).

• Sailing stones are part of the geological phenomenon in which rocks move and inscribe long tracks along a smooth valley floor without animal intervention. The movement of the rocks occurs when large sheets of ice a few millimeters thick and floating in an ephemeral winter pond break up on sunny days.

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Answer 2

Explanation:

1.Red tides are a phenomenon of discoloration of sea surface. It is a common name for harmful algal blooms occurring along coastal regions, which are resulted from large concentrations of aquatic microorganisms, such as protozoans and unicellular algae.

2.A fire whirl or fire devil, is a whirlwind induced by a fire and often composed of flame or ash. These start with a whirl of wind, often made visible by smoke, and may occur when intense rising heat and turbulent wind conditions combine to form whirling eddies of air.

3.Penitentes are spikes of snow that form typically only in high-altitude areas, like Chile's Atacama Desert. They can get as tall as 20 feet in the right conditions. Their name comes from their resemblance to a group of monks who wear spiky hats. And they've been around for a while.

4.Sailing stones are part of the geological phenomenon in which rocks move and inscribe long tracks along a smooth valley floor without animal intervention. The movement of the rocks occurs when large sheets of ice a few millimeters thick and floating in an ephemeral winter pond break up on sunny days.