Science Experiments

Pb comes from the Latin word plumbum, and it's the chemical symbol for lead.

Being an igneous rock, a pegmatite can have numerous "origins". A pegmatite is thecoarsest of the igneous rock types, with the largest crystals, resulting from a very slow rate of cooling. At the Boomer Mine in the South Park of Colorado, a single beryl (beryllium aluminum silicate) crystal was mined from the pegmatite rock there which was six feet in diameter and nearly nine feet long. The Boomer Mine pegmatite is part of the Pikes Peak batholith. Unfortunately, it was uncovered on a weekend when the resident geologist was off work and the miners put the crystal into the mills crusher!! It should have gone to the Smithsonian Institute. You may know beryl as the semiprecious stone "aquamarine".

Magnifying glass and tweezers is the only simple way I can think of.

There might be some way of doing it by density or size.

You could use an experiment.

The Purpose of analizing data that is collected in an experiment is for scoring the results obtained in the experiment.

easy! thats would be the INDEPENDENT VARIABLE!

Silica sand is the major component of glass (quartz).

sample space

Since water and carbon dioxide are both compounds which contain oxygen, it is possible to obtain oxygen from either, but you get a different residue depending upon which compound is the source of the oxygen. Take the oxygen out of water and you are left with hydrogen gas; take the oxygen out of carbon dioxide and you are left with carbon, which is a black solid. It is easy to spot the difference between hydrogen and carbon.

In a controlled experiment there is only one experimental variable because if you have more than one experimental variable 1) you wouldn't be able to know if your hypothesis is correct or not and 2) your answer wouldn't be accurate so you wouldnt know which made a difference in the experiment.

cw: In more advanced experiments, you may find many experimental groups. For more information, see any Statistical book on a set of procedures abbreviated ANOVA and MANOVA.

Short wave radiation. You might separate it to X-ray or Ultra-Violet but basically, any wavelength shorter than 400 nm had degree of harm. The shorter wavelength the more energy/photon and higher risk of causing DNA damage and resulting to cancer.

In an experimental design comparing two groups in which one group gets one treatment and another group gets a second treatment, the experimental group is the group with the "different" treatment. The control is the "usual" treatment; the experimental group gets the "new" treatment. Of course, things get complicated with more complicated "experiments."

A control group is what you are comparing your test agent against. For example, if you are testing to see if a new fuel works more efficiently that an existing one, you would test the existing fuel under the same conditions as the new fuel.

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How the Heart and Circulatory system work.

the molecules in Ice is slowed to where they stop. When temperature rises it starts to move causing friction between the molecules which melts the frozen water. Think of people in a town square, mostly active around 4-6 then after that people slowlystart leaving, when no one is there it's frozen, then tomorrow more people show up causing it to turn liquid.

Even though the air travels from bronchi to bronchiole to alveoli to have the gase exchanged, the REAL gas exchange happens in the capillary that is on the alveoli. This is where the blood that is carrying CO2 exchanges it with O2 to supply the rest of the body. Without the circulatory system... Well first of all you're going to die without the circulatory system, but for this topic, if you don't have the circulatory system, then the oxygen cannot be exchanged with CO2 and you're body will die from lack of oxygen.

Electrodes, the positive side is called the Cathode and the Negative side is called the Anode.
The anode and cathode. The anode is positively charged and the cathode is negative.

The glassware that provides the most accurate measurement of volume is the measuring cup. A glass measuring cup has lines on it to give an accurate reading.

In the original experiment (Yale University, scientist and teacher in the same room, pupil separated by screen), about 2/3 of subjects continued to the final 450-Volt electrical shock. Out of those who refused, only one teacher refused to go higher than the 300-Volt level. All 40 teachers turned around and questioned the scientist at some point in the experiment.

Later experiments varied the set-up and it's pointless to list them here. For example, when Milgram did the experiment in a rundown back-street office (as opposed to the world-famous Yale University), 1/2 of the teachers were fully obedient. When the scientist gave instructions over the telephone instead, teachers were more likely to stop the experiment (some even pretended to be doing it). Similarly, if the pupil was directly in front of the teacher, he would also be less obedient. All these experiments used men; when Milgram did the same experiment with women they were equally obedient but more visibly stressed.

When Milgram added 'obedient' assistants, 90% of teachers continued to the end. When Milgram used 'rebellious' assistants, only 10% of teachers would continue. If there were two scientists in the room disagreeing over whether to continue the experiment, none of the teachers continued towards the end.

Kinetic energy is the energy that an object has when it is in motion, so anything that will stop the motion of an object will decrease it's kinetic energy. The motion of an object can be stopped by any outside force acting on the object, whether sudden (think of stopping a rolling soccer ball with your foot -- that's decreasing it's kinetic energy), or continuous (the friction of that ball against the air and ground will eventually cause it to stop rolling on its own).

In the vacuum of space where there is no air to create friction a projectile will continue moving at the same speed without stopping and without decreasing its kinetic energy.

Measured variable, control variable, treatment variable and moderating variable

it depends on its shape thickones disslove fast andd slow ones disslove slowly

Mitochondria, these organelles are termed as the power house of the cell and produce the cell's energy from the process of respiration which involves the oxidation of energy sources by use of oxygen.