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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
Viral infection transmitted by mosquitoes and leading to jaundice hemorrhage renal failure?
denngue fever
What is the pathway of air through respiratory system?
At the back of the nose and throat lies the pharynx. The pharynx is further divided into the nasopharynx, oropharynx and layrngopharynx (aka hypopharynx).
The nasopharynx from the base of the skull to the soft area at the roof of the mouth (soft palate). The sides of the nasopharynx are open and contain the sustachian tubes. Tonsils and adenoid are at the top of the nasopharynx.
The oropharynx connects with the soft palate, travelling to the epiglottis (the valve that stops us from inhaling food, and closes when we drink and eat). The oropharynx communicates with the respiratory and digestive system.
The laynrgopharynx begins at the epiglottis and and extends to the esophagus.
Next comes the larynx, and now we're starting to enter the airways. The larynx connects the upper and lower airways. Then there's the trachea, mainstem bronchi, lobar bronchi, segmental bronchi, and subsegmental bronchi - all divisions within the lungs of the bronchial tubes.
Now things get smaller. Further down are the bronchioles, or small airways. This is were we start to get air. The bronchioles are the source of oxygen delivery.
At the very end, in the terminal bronchioles, air conduction (not exchange) ends.
We're almost there. The respiratory bronchioles are the very beginning of where we exchange air, taking in oxygen and blowing out carbon dioxide
Mouth --> Pharynx --> Larynx --> Trachea --> (LUNGS: Bronchus --> Bronchioles --> Alveoli), then back out.
What type of eye protection should you wear when using high intensity light?
When using high intensity light you should use eye protection that is designed to reduce the light intensity sufficiently that your eyes will not be injured. Selecting the correct eye wear requires knowing how bright the light is and at what wavelengths the light is produced. Just picking up a pair of dark glasses may not provide the needed level of protection.
Why is it called renewable energy and how does it differ from fossil fuel energy sources?
Renewable energy means that this type of energy will never get exhausted. There will be enough for all generations. It differs from fossil fuel energy resources becaus it is less polluting and easily available in a large quantity
Why you need to wear closed tied shoesocksand long pants in lab?
This is a safety guideline to prevent any chemicals from spilling on your feet or legs because a chemical can burn you if it gets directly on your skin. Highly concentrated chemicals can produce even more serious burns.
Depends on what type of seed you're talking about. Most seeds simply need the right temperature and the right amount of humidity. An easy way is to put a wet paper towel in a bag, put the seed in the paper towl, and put it in a warm place in the house.
What luminous intensity of LED lights can damage retina of human eye?
Pls read "The Influence of Low-powered Family LED Lighting on Eyes in Mice Experimental Model" in life science journal and you will know most of them will damage eyes. Not depend on luminous intensity.
How do you make a 3d model of an ear?
The best way to make a 3D model of an ear is to design each part and then put them together. You can build each part out of paper mache for example.
Are the two reproductive system active in hermaphrodite?
While it is possible, there has only ever been one case of a hermpahrodite that had both sets of organs functioning. Said hermaphrodite looked like a normal male externally, and had fathered children. Internally he also had a fully functional uterus and ovaries, but no vaginal canal. His conditionn was only discovered, after years of pain once a month, he finally decided to consult a physician. I am not certain what happened with his medical case from there. But typically, when a doctor finds a case of someone who was born as one sex house the internal organs of another sex, the "foreign" organs are removed "to prevent cancer".
Normally a hermaphrodite can only have one set of organs that actually function for reproduction. And it is very common that neither set function reproductively. It takes a precise mixture of genetic anomolies to give rise to a fully functional human hermaphrodite. This mixture has has not occured in recorded history, but enough evidence has arisen to show that it is possible.
I think Gearges Bunnot who invented candles also invented the scented candles.
Is a gastrovascular cavity a digestive tract with two openings - a mouth and anus?
No, a gastrovascular cavity only has one opening. Only an alimentary canal features a mouth and anus.
What type of chocolate melts the fastest dark milk or white?
well i tested it and the white chocolate was first and the milk chocolate was second and the dark chocolate was the last to melt it really didn't melt though
How do you do the soda experiment on eggs?
First you need to hard boil as many eggs you need for the experiment. Then pour soda into cups; use both dark and light colored sodas so you can compare/contrast the effects of different colored sodas on your teeth. Put the hard-boiled eggs into the cups (one egg per cup) making sure that the egg is completely covered with soda. Allow the egg to sit overnight. The next day, remove the eggs from the soda cups. Discuss how the eggs are stained because of the soda which is why we must brush our teeth to keep them from being stained. I like to follow up with a lesson about brushing with fluoride toothpaste afterwards and have my students "brush" the egg clean.
synthetic cloth are prepared by the mixing of two chemicals. Egs are: nylon, terylene.
It's based on the air pressure measurement of the environment. Before it starts to rain pressure dramatically drops. That's particularly why some people have headaches before rains.
