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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
What is learned if the data from an experiment do not support the. Hypothesis?
some information; the data still provide valuable information about the hypothesis
How many meters are in 325 millimeters?
There are 1000 millimetres in one metre. Therefore, 325 millimetres is equal to 325/1000 = 0.325 metres.
What would happen if you don't wear safety goggles?
First of all do not wear goggles when arc welding you will arc burn your face, wear a welding hood.
Photokeratitis or ultraviolet keratitis is a painful eye condition caused by exposure of insufficiently protected eyes to the ultraviolet (UV) rays from either natural or artificial sources. Photokeratitis is akin to a sunburn of the cornea and conjunctiva, and is not usually noticed until several hours after exposure. Symptoms include increased tears and a feeling of pain, likened to having sand in the eyes.
The injury may be prevented by wearing eye protection that blocks most of the ultraviolet radiation, such as welding goggles with the proper filters, a welder's helmet, sunglasses rated for sufficient UV protection, or appropriate snow goggles. The condition is usually managed by removal from the source of ultraviolet radiation, covering the corneas, and administration of pain relief. Photokeratitis is known by a number of different terms including: snow blindness, arc eye, welder's flash, bake eyes, corneal flash burns, flash burns, niphablepsia, or keratoconjunctivitis photoelectrica.
What is The thing you change in an experiment?
The chemical composition and physical state of substances can change during an experiment.For example two reactants in solid or liquid form can react in an experiment to give a product in a gaseous form.
Can you breath under water with a bucket on your head?
If there is An Air bubble underneath water, yes you can breath
What is the control group in an experiment?
set up the same way as the experimetal group except the independent variable is absent
A control group is identical to the experimental group in every way but it lack the experimental variable. This is the group not being tested on.
A control group is a group of specimens on which you do not perform the experiment procedure. The control group therefore tells you how the specimen behaves under "normal" circumstances, and you can compare your other specimens to this control group to study the effects of the experiment.
When someone performs an experiment on biological organisms they do something to the organism. Then they need to know if what they did changed the organism in a way that would not have happened had they not performed the experiment. So, they need to compare the group they did something to with a group that nothing was done to. This comparison group that had nothing done to it is called a control group.
The control group in an experiment is the group that stays the same and is not changed in any way. Because it is not changed, other variables may be compared to it.
For example:
You are testing whether temperature has an effect on the breaking point of rubber bands. You take one rubber band and put it in the freezer and another is heated. A third rubber band is left at room temperature. The one left at room temperature is the control. It is the normal result you are comparing your other two results to.
You must be sure that the rubber bands are exactly the same in size, width, construction and composition.
Controlled experiment means you keep every other variable constant, except for one ( the one being tested). A variable means something that varies, or keep changing. Controlled experiment removes all the possibilities of external influences on the subject. Everything else must remain constant in a controlled experiment, that's how you will able to study it in its true context.
To help researchers conclude that results arerelated to the new drug and not to the orange juice
Is the normal/known setting or amount or value that is tested against. That way you can determine change from experiment.
Which shows that the results of an experiment are reliable?
An experiment in which the results are repeatable....apex
Can electricity pass through a paperclip?
Most common paper clips are steel and conduct electricity. Some clips are made of plastic or have thin plastic coatings to reduce rust and these will not conduct electricity.
yes
What are the 5 characteristics of chemical change?
During a chemical change the structure of molecules (as chemical composition) is changed.
Signs of chemical reactions may be:
- Gas release
- Formation of a precipitate
- Change of color
- Change of odor
- Change of pH
- Change of aspect
- Change of viscosity
- Change of the temperature
- Visible formation of new compounds
What is the difference between fluorine and chlorine?
Chlorine is the name of the 17th element. In its pure form it is a toxic green gas.
Chloride is the ion formed when chlorine gains an electron, giving it a negative charge or otherwise refers to compound in which chlorine is in its 1- oxidation state (e.g. methyl chloride).
What is the best science experiment in the world?
the best science project is making a scientific gew made by corn starch water and the materials are water a crafts stick an a clear glass and cornstarch and yall other people that think it is a good on this one will geve u a A+ on a test.
Why was Erwin Chargaff's experiment important?
that the DNA of a given species containes equal amounts of cytosine and guanine as well as adenine and thymine.
In space exploration probes are unmanned (robot) spacecraft sent to the moon, planets or beyond to send back pictures and measurements to help us understand these distant objects.
Factors that remain the same in an experiment?
The factors that are kept the same in an experiment are the constants.
The factors that aren't kept the same in an experiment are the variables.
What is an investigation plan for a science project?
1. identify area of investigation 2.select a topic 3.define research problem and objectives 4.formulate research hypothesis 5.design and conduct experiments9if necessary) 6.start gathering/collection of and recording of data 7.analyze and interpret data 8.summarize findings 9.formulate generalization/conclusion 10.make recommendations 11.prepare formal written technical report 12.oral presentation of I.P
Why is it important to identify as much variables as possible in an experiment?
Accounting for errors in an experiment will determine the validity and reliability to the experiment. This, in turn, will either support the experimental results by accepting the null hypothesis or to discard the experimental results by rejecting the null hypothesis
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My explaination will be Carbon,the non-metal element that contains of 6electrons,2.4 .....the positive charge 4 valenced electrons will share its electron with 2 oxygen atoms that consists of 4 valenced electrons too,in order to achieve stable octet electron arrangement,thus CO2 is formed
What were the results of Mendel's first experiment?
i believe his results were that after cross pollinating to non-purebred pea plants, the offspring were all tall like the female,and when he crossed the other two, he received three tall pea plants and one short
What does a safety sheet mean for a science fair project?
a safety sheet is any thing that you need to include about the safety if someone else will want to do it.
(ex.) if you are dealing with chemicals you will need to include that you need gloves for experiment.
What is the basic formula of making thinner?
Paint thinner?
There are two basic paint thinners on the market. The old timey one is turpentine. The process of making it is to extract the resin from pine trees then distill the resin to extract the turpentine from it.
Turpentine is expensive, so the modern paint thinner is mineral spirits, which is made out of hydrocarbons and hexane.
Chemical changes can be both good and bad. Some chemical changes are necessary for life to exist, such as in the process of digestion. However, some chemical changes can be harmful, such as those that occur in pollution or the degradation of materials.
What make condensation form on a side of a cold glass?
If you have a cold glass and you leave it in the heat or anywhere where heat can get to it than it will form condensation. That is where there are little water bubbles on the outside and inside of the glass.
