“What happens when solids particles do not dissolve in water?”
Many types of solid particles are able to be dissolved in water. But often this is not always the case. Some particles are able to stay suspended in water, contaminating its purity. These Suspended Solids are often fine particulate matter, such as the ones from wildfire air pollution, that have settled onto the water. These can be purified either through the use of a water filter or sedimentation.
Image credit http://www.onsiteinstaller.com
“What is the type of air pollution that makes skies blurry?”
One of the most famous visuals of the effects of air pollution are the blurry and disrupted skies. Whether it be from the urban centers of India, the smokestacks of Chinese factories, or the wildfires in California. One of the main causes of this is from particulate matter the size of 2.5 microns, commonly referred to as P.M 2.5. P.M 2.5 arises from burning materials and can travel deeply into the lungs of humans, causing intense medical damage.
“How can we measure how porous an object is?”
If an object is porous it means that it has empty space in it. The measure of this empty space is known as the Porosity, and can be found on a sliding scale from zero percent to one hundred percent.
Image credit https://i.ytimg.com
“What exactly are single-use plastic and why are they so bad?”
Plastic is a very useful material. It’s flexible, fairly non-reactive, and strong, making it applicable for single-use grocery bags. However, the fact that Single-use Plastics are not recyclable and biodegradable means that they will end up in a land-fill and release toxic chemicals into the environment. To solve this crisis, a new generation of thinkers will have to come up with innovative policy and technical solutions. This could be anyone, from a regular Joe to someone whose name rhymes with Narina.
“How can we lower the freezing point of water?”
Water is known for its important freezing point. In fact, the entire metric temperature system is based off it! However, sometimes we may need to lower its freezing point. This can be accomplished through Antifreeze substances. Antifreeze is usually based off mixtures of water and either ethylene glycol (EGW) or propylene glycol (PGW). Antifreeze has plenty of applications, ranging from automotive engines to electronics cooling.
Image credit i5.walmartimages.com
Ducted Fume Hoods
“What is the most common type of fume hood?”
Fume hoods are a vital part of scientific labs. The most common type is usually a Ducted Fume Hood design where conditioned air is drawn from the lab space and siphoned into the outside atmosphere. The simplicity of the design has made it a staple of labs across the world.
Image credit upload.wikimedia.orgImage credit
“How do scientists ensure that they are safe from chemical fumes in the lab?”
Biology and Chemistry often involve a lot of messy lab work involving chemicals, which may give off dangerous vapors. To prevent these from damaging the air quality in the lab and the health of the denizens, the fumes must be cycled away. This is commonly done through fume hoods, which sucks in air from a workbench and ventilates it to the atmosphere. Fume hoods are a vital part of the safety of every lab and have become a staple of the wet-bench research environment.
Image credit kewaunee.com