Science Experiments

i don't know, will someone help me?

Scientifically, strength refers to degree of ionisation - a strong compound ionises completely, a weak one ionises little.

You measure the ambient temperature before the experiment in case the experiment is sensitive to ambient temperature. You want to record all of the environmental factors that might affect the experiment before starting it. You measure the ambient temperature after the experiment for the same reason, and also in case the experiment affected the ambient temperature. Depending on the experiment, environmental factors may need to be considered when analyzing the results.

To avoid killing the test subjects before the test can begin.

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Variables

Both have their place, but in general, I'd say yes. Quantitative observations are those that show facts, such as 'the subject grew 10cm in the designated time frame.' Qualitative observations can be said to be what you percieve, ie. 'the subject doesn't look as though it has grown much'.

Paper chromatography can be done in that time period pretty easily; it's also got some visual appeal. Things that might be interesting: * Food pigments (spinach, beet, carrot, blueberry, mulberry, etc.; if you do spinach, look closely for the yellow-orange band in addition to the obvious green) * Inks from colored markers Or you could use natural pigments (from spinach, beet, blueberry, red cabbage ... same as chromatography; anything that's highly colored) to try to dye various kinds of cloth: cotton, silk, polyester, nylon, wool. Show which kinds of fabric take dye well and which don't. Again, lots of colors means visual appeal, never a bad thing in a science fair.

Chart, graph.

you conduct multiple trials so that if a variable was accidently changed in the first experiment you can catch and correct it in the next experiments. this way you get an average answer that can work almost every time. this way you can see if your theory works the same every time. So that we can explain.

Comparing is when you try to find the similarities between two things while contrasting youre trying to distinguish the differences.

A variable is anything which can vary, such as the length of time allowed for the experiment, the temperatures of the reactants, the pressure under which the experiment is taking place, the states of matter of the reactants (liquids, solids, gases) and the concentrations of any solutions being used.

in the most basic terms it works the same as a micro phone and speaker.

In both a microphone and a speaker there's a diaphragm with a magnet inside a coil. As You speak into the mirophone the sound waves move the diaphragm back and forth causing the magnet to move back and forth, this induces current in the coil and the rest of the circuit. A speaker works the same but in reverse the current causes the magnet to move causing the diaphragm to move creating sound. So basically the signal of one mircophone is connected to the other persons ear piece.

Hope that helps

replication

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Because it will perform a test of how two variables might be related. This is when you are doing a real experiment.

Experiment

Observation is done by using your five senses, smell, touch, feel, sight and taste(altough generally in science we do not taste).To make an observation we observe before and after. If there was a change of state you must include that or if the heat or texture changes that is an observation.When wriring it in an Experiment you must use adjectives, e.g. fizzing, bubbling or you can use a colur if there was a colour change Hope this helps!

Well the colour depends on the experiment that you tested. Red would not be good on a project about water. But in general, a scientific-like background (Globe sketches, or Leonardo Da Vinci's picture of the human body or something like that) would fit in almost all projects. But it all depends on the project you're doing.

Test tube

i dont know! someone help me! :(

Independent variable

What is the name given to the part of an experiment that says the same and is basis for comparison?

DONT REPET THE QUESTION!!!!!!THEY AREADY ASKED IT IN THEIR SEARCH!!!!!!