Fume hood is usually used in the laboratory in order to prevent exposure to hazardous chemicals. Fume hood is like a big cupboard; chemical reactions that produce hazardous products are usually produce inside it. One has to check that fume hood is working correctly before using it. The hood confines hazardous airborne materials, dilute them with a large amount of air and expel them through the exhaust pipe on the roof of the laboratory building.
Wet barometer - The tool works by measuring atmospheric pressure to predict incoming weather. Since the glass is only filled halfway with water, the other half is exposed to the atmosphere. When the outdoor atmospheric pressure rises, the pressure in the glass decreases, and causes the water to move down the spout.
Dry barometer - A Torricellian barometer (sometimes called a mercury barometer) is an inverted (upside-down) glass tube standing in a bath of mercury. Air pressure pushes down on the surface of the mercury, making some rise up the tube. The greater the air pressure, the higher the mercury rises.
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Skylab was the first space station.
A) enzymes
<span>Enzymes are catalysts which aid in speeding up chemical reactions (for example, breaking down hydrogen peroxide into water and oxygen). </span>
Answer:
The hardy lichens are useful bioindicators for air pollution, espeially sulfur dioxide pollution, since they derive their water and essential nutrients mainly from the atmosphere rather than from the soil.
Explanation:
It also helps that they are able to react to air pollutants all year round.
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Brainliest?