My assignment is to write about a famous scientist. I chose Marie Curie.
I found enough information. I only need to do a 5 min. presentation, but part of the assignment requires that I do a simple experiment.
I don't know what that could be in this case, any suggestions?
Thanks.
I would borrow a radiation detector from you local firedepartment (or they can tell you how to borrow one from the RADHAZ teams. It is quite possible one of them will bring it to the school and give a demostration with them with real radio active sources. If not, you can get radioactive sources from any fire detector. Talk to your mom about this, she can make calls for you.
Thanks for the info.
We'll look into it.
Your experiment does not need to be like that of Marie Curie. Here are some of the basics of the experimental method with an example.
An independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable.
A dependent variable is the response or measure of results.
Extraneous variables — other than the independent variable — potentially can affect the dependent variable, so they must be controlled. If possible, you try to keep them constant between the experimental and control group.
The experimental group receives the independent variable.
The control group is similar to experimental, except it does not receive the independent variable. Extraneous variables are balanced between experimental and control groups.
Types of experiments
1. Single blind gives the control group a placebo — a substance that is inert, it has no physical effect. Subjects don't know if they are in experimental or control group to reduce placebo effect, a change in behavior solely due to believing that you are getting the independent variable.
2. Double blind keeps both subjects and experimenter ignorant of group setup. Distribution of the independent variable and placebo are controlled by third party. This controls for experimenter bias and self-fulfilling prophecy, which means that experimenters with particular expectations are likely to consciously or unconsciously to bias the experiment and influence it to conform to their expectations.
As an example, suppose you want to find out if fluorides reduce dental cavities. You would find two groups, trying to control the extraneous variables. Extraneous variables are found by surveying previous research in the area. In this case, you would match the groups in terms of previous history of cavities, diet and dental hygiene habits including how and how often they brush their teeth.
The experimental group would get toothpaste with the independent variable, the fluoride, while the control group would not have the fluoride in their toothpaste. The toothpaste without the fluoride would be the placebo.
The dependent variable would be the number of cavities after participating in the experiment for a time. The dependent variable indicates the results, but it is not the results. At the end of the experiment, both groups could have no change in cavities or one of the groups could have a greater reduction in cavities. (Of course, if the fluoride increased cavities, you wouldn't want to use it.) All of these varied results would be indicated in terms of the dependent variable.
If only the subjects do not know who is getting the fluoride, it is a single blind experiment. If both the subjects and experimenter do not know, it is a double blind.
You need to decide what expoeriment to do.
I hope this helps. Thanks for asking.
I need help on chapter 3 review in book glencoe science level red
whats up peeps I HATE SCHOOL
For your presentation on Marie Curie, it's a great idea to include a simple experiment to engage your audience and demonstrate the scientific principles that she worked with. Here's a suggestion for a simple experiment related to Marie Curie's work on radioactivity:
Materials needed:
1. A sheet of paper
2. A pencil
3. A piece of aluminum foil
4. A small piece of cardboard
Procedure:
1. Start by explaining to your audience that Marie Curie conducted pioneering research in the field of radioactivity and discovered two new elements, polonium and radium.
2. Briefly explain that radioactivity is the emission of particles or energy from certain types of atoms.
3. Take the sheet of paper and draw a small circle in the center using a pencil.
4. Cut out the circle from the sheet of paper.
5. Wrap the piece of aluminum foil around the small piece of cardboard to create a small cup-like shape.
6. Place the aluminum foil cup on top of the drawn circle on the paper.
7. Gently pour a small amount of salt or sugar into the cup, filling it partially.
8. Hold the paper circle with the aluminum cup directly above a source of static electricity, such as a comb vigorously brushed against your hair.
9. Move the comb closer to the aluminum cup and observe what happens.
Explanation:
The static electricity generated by the comb will cause the particles in the salt or sugar to become charged. This will make the particles stick to the aluminum cup, causing them to move towards it. By conducting this experiment, you can visually show the concept of charged particles being attracted to a certain material, which relates to Curie's work on radioactivity.
During your presentation, be sure to explain Marie Curie's important contributions to the field of radioactivity, including her discoveries, the challenges she faced, and the impact of her work on modern science.