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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
What caused researchers to stop the Stanford prison experiment after only six days?
The students acting as prisoners were showing signs of extreme distress.
What chemical is the genetic material made of?
The molecule which makes up the genetic material are series of chemicals called nitrogen bases held in a long winding helix. These nitrogen bases are used like letters or characters in a simple code.
You can melt any remains of old candles down to make new ones, but the burning of a candle uses most of the solid wax as fuel, which goes into the atmosphere.
What is the Lewis structure of PCl2?
The Lewis structure of SO2Cl2 is constructed as follows: Place the S atom at the center. Double bond the S atom to 2 O atoms 180 degrees from each other. Single bond the two Cl atoms 180 degrees away from each other to the S atom.
Can you use a erlenmeyer flask to calculate the density of a liquid?
You can, but the volume will not be as accurate as using a graduated cylinder, and will probably give you an inaccurate density.
How strong does an earthquake have to be so you can feel it?
No earthquake having solely terrestrial causes can be stronger than 10 on the Richter scale, because no type of rock is strong enough to store that much energy without breaking before then (and thus causing a smaller earthquake). The strongest earthquake ever recorded so far was a 9.5 earthquake.
In principle larger earthquakes could be caused by impacts with very big asteroids or comets, but no impacts that large have occurred in recorded history.
How does a wind up torch work?
all windup watches work by a mainspring that is wound up really tight, the spring wants to let go as soon as it is wound up tight. as you wind up the mainspring that parts in the watch start to move and the watch starts to keeps time. this is called a balance action. the balance wheel has a hairspring under it that returns the balance wheel to its main position as you wind the mainspring the force of it puts tension on the parts and that is how the windup watch works.
How do you test for salt content in sand for building?
1. Put a sample of sand in a beaker and add warm water.
2. Stir vigourosly.
3. Filter on a filter paper.
4. Determine the chloride ion in the solution by gravimetry with silver nitrate or using a ion specific electrode for Cl-.
Why is it important that your reference point be stationary?
A reference point is part of the definition of movement or displacement.
The difference, over time, of your distance or orientation to a given reference point or points defines movement.
What chemical melts the ice fastest?
NaCl, sodium chloride, is well-known for lowering the melting point of water. What you are asking, though, is a question which, albeit not exceeding my knowledge of chemistry, triggered my thinking nuts in my head. After taking a step back and thinking about the physics and chemistry behind ice melting, I came to a conclusion. But first a short introduction to ice melting:
First of all,
Ice is the solid form of water which means that the molecules in it moves slower than in the liquid form. In short, their kinetic energy is lower than in the liquid state. This occurs typically around 0 degrees Celsius for water, simply because the energy at this temperature is to low to contain the required movement of liquid water molecules.
Secondly,
Temperature is nothing more than the average kinetic energy of the particles in a substance.
With this in mind, the best way of melting ice is to slam as many high-energy particles we can into the ice, since more particles with higher energy means a faster energy transfer, thus leading to a faster melting.
Another take on this is,
If we try to melt a 2 cm3 ice-cube in a vessel containing a litre of water at 20 degrees Celsius it will go faster than if we try to melt it in a vessel containing a litre of air at the same temperature. This is not surprising though if we think of the number of molecules in a litre of water contra that in a litre of air. There are clearly much more molecules in the vessel containing water. And more molecules means a higher chance of them slamming into, and transferring their energy to the ice-cube. This is why the water containing vessel melts the ice faster.
Lastly, NaCl, as suggested as one of several potent chemicals to, perhaps not make the ice melt faster, but to lower its melting point, works by interacting with the water molecules. Since NaCl consists of Na+ and Cl--ions and water molecules are polar, what happens is pretty much that the partially negatively charged part (the oxygen) of the water molecules turns so that it faces towards the sodium ion, while the partially positively charged hydrogen-atoms turn toward the chloride ion. This gives a situation which is basically the same as the so-called "solvent effect" that occurs when NaCl (s) is diluted in water in liquid state.
How is bounty paper towel strong?
Bounty brand paper towels are stronger than other towels because they contain a mesh weave made of thread. Paper is then placed onto the weaving threads and enormous pressure is applied to mesh the weave with the paper.
Well there are minerals every where so then the minerals could end up in the magma and then go threw the rock cycle.
What does the control variable do in a research project?
A control variable is a test subject where nothing is tested on it and instead is used to compare. Let's say you had 2 oranges. Orange 1 is left in the sun for 8 hours while orange 2 isn't doing anything. Orange 2 would be the control variable because nothing happened to it and you can use it to compare with orange 2 that has melted in the sun after 8 hours. Understand? If you don't just ask your science teacher and he/she might explain it better.
Give three examples of how microorganisms might demonstrate the characteristics of life?
1. Sperm
2. Egg
3. Apple Seed
How should my science fair board look like?
A three fold poster board
make sure the title is very very large and easily readable
use borders on any pictures and information
don't put huge paragraphs on it
use lots of unique creative decoration
drawing things in yourself is a plus if it's not done sloppily
What ingredients are needed for cellular respiration?
Aerobic cellular respiration requires glucose and oxygen. If glucose is not available, the cell can use other carbohydrates or other organic compounds.
Is thermal decomposition a endothermic or exothermic reaction?
Thedecompositionof water is endothermic since energy is required to break up the bonds between the hydrogen and oxygen in the water molecule. Therefore the decomposition of water absorbs energy, making the reaction an endothermic one.
The main component of the myelin sheath is?
Myelin is composed of about 80% lipid and about 20% protein. Some of the proteins that make up myelin are myelin basic protein (MBP),myelin oligodendrocyte glycoprotein (MOG), and proteolipid protein (PLP). Myelin is made up primarily of a glycolipid calledgalactocerebroside. The intertwining of the hydrocarbon chains of sphingomyelin serve to strengthen the myelin sheath.
There are quite a few disease (multiple sclerosis, optic neuritis, transverse myelitis..) involved in the destruction of the axon myelin sheath also known as myelin sheath.
http://en.wikipedia.org/wiki/Myelin
Is something that is capable of being changed?
Pretty much all things are subject to change. Science for one. The Nature of Science states that science is ever changing and our view of science will always shift and differ from previous inquiries.
More Information:
A variable.
What is the meaning of iron stand?
An iron stand is a piece of laboratory equipment used to hold or support beakers during experiments. It is a raised and usually ventilated metal stand which a hot flatiron can be rested on.
