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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
Add salt to water and get pure water back?
you should distille the water ( heat the water so it evaporates and let it condensate into a cup or a mirror)
Desribe one property of metal that makes it a good material to connect to the cells and bulbs?
One property of metal that makes it a good material for connecting to cells and bulbs is its high electrical conductivity. Metals such as copper and silver have low resistance to the flow of electricity, making them efficient conductors. This allows for easy and reliable transfer of electrical energy between the power source, cells, and bulbs in a circuit.
What does variables mean in a science project?
That means something that will change, basically, the point of your experiment
What are facts about the line of reflection?
Given a line L and a point P. Reflection P' of P in L is the point such that PP' is perpendicular to L, and PM = MP', where M is the point of intersection of PP' and L. In other words, P' is located on the other side of L, but at the same distance from L as P. P' is said to be a mirror or symmetric image of P in L. The line L is called the axis of symmetry or axis of reflection.
P' exists for any P. Let's write SL(P) = P'. If P' = SL(P), then P is the reflection in L of P':P = SL(P'). So that repeated reflection does noting: it does not move a point. Formally,
SL2 = I,
Where I is the identity transform. SL(P) = P, iff P lies on L.
The reflection transform SL applies to arbitrary shapes point-by-point. Each point of a given shape S is reflected in L, and the collection of these reflections is the symmetric image of S: SL(S). To determine SL(S) when S is a polygon, suffice it to reflect its vertices. This is exactly what has been done in the applet below.
On the other hand, if S' is known to be a mirror image of S, then any pair of points P and P' not fixed by the reflection (P ≠ P'), the axes of reflection is uniquely determined as the perpendicular bisector of PP'.
In the applet, you can create polygons with a desired number of vertices, drag the vertices one at a time, or drag the polygon as a whole. Axes of reflection can also be dragged. They rotate if dragged near the applet's border, or translate if dragged nearer their midpoint.How can you cheat on or get a science fair project done?
Well, what i do is make fake data and if you need pictures of the experiment get them off the computer and call it your pictures. If you for whatever reason cannot get your project done on the last night you can go to freesciencefairproject.com and it will show you answers to your project ;)
In a redox reaction the numbers of some of the elements changes from the reactants to the products?
In a redox reaction the OXIDATION numbers of some of the elements change from the reactants to the products. The numbers of atoms each element never changes in any chemical reaction.
What could be catchy title name for my science fair project does age affect lung capacities?
Breath In, Breath Out
In and Out
What is the van't Hoff factor for AlCl3?
The van't Hoff factor for AlCl3 is 4. AlCl3 dissociates into Al3+ and 3Cl- ions when it dissolves in water, resulting in a total of 4 ions in solution per formula unit of AlCl3.
Do lighter colored candles have more wax then darker colored one?
light coloured candles do burn faster than darker coloured candles for one main reason. The darker the candle, the more dye molecules are involved in the candle which are non-flammable. Therefore, the lighter the candle, the less dye molecules are involved minimising the risk of the dye molecules interfering with the combustion process.
How does the stuff get in the blotter paper?
Blotter paper is soaked in a liquid solution of a compound, then allowed to dry out.
What primary principle of experimental design did their experiment fail?
On March 23, 1989, the chemists Stanley Pons of the University of Utah and Martin Fleischmann of the University of Southampton announced to the world that they had achieved cold fusion. That is, with a solution of salts in a simple desktop apparatus, they had caused hydrogen atoms to 'fuse' or combine into helium atoms. This reaction had previously been achieved only in hydrogen-bomb blasts and in giant research projects lasting many decades and costing many billions of dollars.
The two chemists claimed that they had been able to measure the energy released by the fusion process in their simple setup. The scientific world was in an uproar, because if this were really true, cold fusion would be the greatest discovery in a thousand years -- a practically infinite source of cheap, safe energy.
However, no matter how hard they tried, no other scientists were able to get the same results. Pons and Fleischmann had dozens of excuses, but none of them were shown to have merit. Ultimately, both scientists resigned in disgrace.
REPLICATION
What temperature differences occur from beginning to end in an explosion?
Well if you turn around three time and then say i like watermelons that is your answer
What is the abstract for egg in bottle experiment?
First, the science behind a hard-boiled egg: Egg whites are made of water and proteins. Proteins are made of long chains of amino acids, but in an egg the chains are clumped tightly together in individual spheres. (These are called "globular proteins.") When the egg is heated, the proteins and water molecules begin to move faster. As they move and collide with each other, the individual protein chains start to "unravel," eventually bonding loosely with other protein chains, forming a network of protein with water trapped inside. The consistency has changed from runny egg white to a soft solid!
So how does this squishy-but-solid egg get mysteriously pushed inside the bottle? The answer is all about air pressure. When you first set the egg on the bottle, the air pressure inside the bottle matched the air pressure outside, so nothing happened. When you dropped the burning paper into the bottle, it caused the air inside to heat up and expand rapidly. That expanding air pushed the egg aside and escaped from the bottle; that's why you saw the egg vibrating. When the fire consumed all the oxygen inside the bottle, the flame went out and the remaining air in the bottle cooled down. Cool air takes up less space, exerting less pressure inside the bottle. (The egg acted as a seal to prevent outside air from getting in to fill the extra space.) The result was an unbalanced force-the force of the air pushing on the egg from outside the bottle was greater than the force of the air pushing up on it from inside the bottle. Voila - the egg was pushed into the bottle!
How do you get the egg out again? You need to increase the pressure inside the bottle. Turn the bottle upside down and tilt it until the small end of the egg is sitting in the mouth. Now put your mouth close to the bottle and blow, forcing more air into the bottle and raising the pressure inside. When you take your mouth away, the egg should pop out.
What should a conclusion include for a science fair board?
You should include some of your results, how you felt about the results and maybe what you would do differently if you were to do the project again.
What is the different between primary absorbance and secondary absorbance in fluorescence?
in primary light absorbed by outer molecule while in secondary re-absorbance occurs
Where do you think we humans get energy?
Monsters, rock stars, 5 hour energy you know that type of things and from our food we eat after drinking these things^^^
Do several sets of trials for each different set of possible conditions.
You need to have temperature, time, battery type.
I am guessing you would just take measurements using a voltmeter(Joules/Coulomb) or ammeter (Coloumb/sec) to measure how much voltage/current the battery releases and compare it to the original voltage, to see how well charged the battery is, from its original state, and do this at regular time intervals.
There are lithium batteries, alkaline, NiCd, D sized, C sized, AAA ... Likely, they all don't work the same.
Do one set of batteries at one temperature, another set at another temp, another at another, etc..
Make charts from each different set of possible conditions, of the batteries.
Make conclusions from the results by seeing correlations and connecting things logically. For ex: as the temperature went down, the batteries better preserved electrical energy.
Testing saliva with litmus paper - what does it mean?
Well if you place blue litmus paper in saliva and it turns red, then the saliva is acidic. If you put red litmus in the saliva and it turns blue, then the saliva is alkaline. However, if the red litmus doesn't change colour and the blue litmus doesn't change colour, the saliva would be neutral.
What does procedure mean in a science fair project?
procedure means to go step by step on what you did
anti-federalist
Why is a solution classified as a mixture?
A solution contains a solvent and one or more solutes. It is classified as a mixture because when a substance is dissolved in another substance, the two substances are still the same substances, not having undergone any significant chemical change, they are just mixed together.
Pumice is an extrusive igneous rock (meaning that it is formed when lava breaks through the earth's crust and hardens on contact with the air). This also means that deposits are found very close to the Earth's surface, and is mined using the drift mine method, in which an open pit is dug. Pumice is removed from the pit as ore, which is a large piece of rock containing the mineral, and is tehn sifted and separated.
