Science Experiments

freezing point

Pure biology is simply the facts about the living world. In research terms, it is basic research, describing migrations of birds, or studying molecules for their function. Applied biology includes fields such as agriculture and conservation. It is taking the pure biology and applying to a problem or field. For example, in pure biology we may find that multiple chromosomes increases the health of a certain species of wheat. Applied biology could use that information to improve the crops that we eat.

By definition, a compound can, somehow, be broken down into its elements. Whether this process is easy depends on the strength of the chemical bonds in the compound and the definition of "easy"!

atomic number

Chemical elements are organized in the form of the periodic table of Mendeleev, in groups and periods.

because the are diffident student every year......

References are the books or internet sites you look up for information you have included in your project and should be listed at the end of your project by book title and authors name or by URL if the information came from a website.

Paracetamol affects the root elongation in certain plants such as wheat, as well as the wheat shoot itself. Paracetamol significantly decreased both parameters, and after a while the paracetamol damages the chlorophyll accumulation and the protein synthesis of the plant.

1 joule per second is 1 watt. So 1 million joules per second is 1 million watts, or 1 Megawatt.

A gram (or milligram) is a unit of weight, while a cubic centimeter is a unit of volume. We would need the density of the substance to calculate what you are asking. If you are dealing with water, then one cc equals one gram, but almost nothing else works out that well.

It necessary when performing an experiment that a large quantity of tests and trials are performed because observations tend to have errors. There are random errors, which are errors in measurement, and there are systematic errors, which are errors in procedure or calibration. Both have to be considered. Performing the experiment more than once allows one to estimate the varience of the results, to reject erroneous results, and to more accurately describe how the results fit the theory.

The dependent variable is the object(s) being tested in the experiment. So if you were to pop a balloon, then the BALLOON would be the dependent variable. Why? Because it is the object being tested. Hope this helped.

-6th grader.

It prevents contamination between different sample or treatments.

A cars weight affects its speed by varying its momentum. If the car has more weight, it has more momentum. With more momentum comes more inertia.(definition: inertia- an objects resistance to change in direction or movement) If the car has a lot of weight, it will speed up slower and stop slower because the cars inertia and momentum keep propelling it forward. If a car has less weight, it will speed up faster and stop faster because the momentum of the car is less than that of the heavier car. A: It is called the power to weight ratio.

It triggers diffusion because diffusion is the movement of molecules, therefore as soon as the molecules move diffusion begins to do it's job. It will take them from areas of greater concentration to areas of lesser concentration.

Yes, the acidic lemon juice works as a conductor between a negatively charged metal and a positively charged metal to create a battery.

It is easy to seperate a chemical that is not soluble in water from a chemical that is soluble in water.

You add water.

Explanation: the soluble chemical will mix with the water, leaving the layer of the insoluble chemical on top or below, depending on the density. You can then extract the top layer using a pipette, or run it off if you are using a burette.

oxygen is an example of a pure substance because a pure substance is made up of one kind of matter and it cannot be broken down into smaller parts.

funny shaped vessel not comical

Carbon dioxide and oxygen enter via the stomata which are tiny pores in the leaves and other organs of plants. Please see the link.

You can control a lot during this experiment. You can control the weight, size, and density of the ball and the angle of the ramp, to just name a few.

They're called 'subjects'