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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
How iron filings can be separated from a bowl of flour?
Gee, let's think about this for half a second. Iron ... as in magnetic? What do you think would be a good way to get iron out of something that's NOT magnetic?
How does osmosis experiment take place with potato?
Beacause when you put the slice of potato in water osmosis takes place since concentration of water is lower then the concentration of the potato and water moves from ow concentration to high concentration so the water will move into the potato and the potato will become ridgid,
But if you put salty water the salty water has a higher concentration then the potato so water will move out of the potato and the potato becomes soft.
Can a experiment have more than one independent variable?
yes it can I've done a few experiments that have had more than one independant variable.
Who first discovered static electricity?
Long long ago even before christ some 500 BC Thales, a great philosopher, found that when amber gets rubbed with woolen material then the amber is capable of attracting small pieces of dust.
Volume
The independent variable is the one you determine, and the dependent variable is the one you measure. In this case, you choose the temperature, and measure the volume.
Differences between descriptive and inferential statistics?
All statistical tests are part of Inferential analysis; there are no tests conducted in Descriptive analysis
· Descriptive analysis- describes the sample's characteristics using…
o Metric- ex. sample mean, standard deviation or variance
o Non-metric variables- ex. median, mode, frequencies & elaborate on zero-order relationships
o Use Excel to help determine these sample characteristics
· Inferential Analysis- draws conclusions about population
o Types of errors
o Issues related to null and alternate hypotheses
o Steps in the Hypothesis Testing Procedure
o Specific statistical tests
Which structure protects the plant body against the invasion of parasites?
The cell wall of plant cells primarily protects the plant body against the invasion of parasites. It provides structural support and acts as a physical barrier, making it difficult for parasites to penetrate the plant cells. Additionally, some plants have specialized cells, such as trichomes or thorns, that can further deter parasitic invaders.
What happens when the pitch of a sound wave is lowered?
The frequency is also lowered. They're the same thing.
Why doesn't variable connectors have to be proprietary?
Because of the invention of USB. By its name, it is universal. When you plug in an universal serial device, the device identifies itself to the computer. The computer then looks for drivers matching that ID and installs them if possible.
Can you use soda and mints to make an eruption?
Yes, you can create a fizzy eruption by combining soda and mints. Dropping mints (such as Mentos) into a carbonated soda like Coke or Sprite causes a rapid release of carbon dioxide bubbles, resulting in a foamy explosion. It's a fun and simple science experiment to try at home!
How is the scientific method based on the ideas of Francis Bacon and Rene descartes?
Francis Bacon developed a theory of 'eliminative induction.'
Induction is moving from specifics to generalities, and whilst it had been proposed as a key part of scientific method by Aristotle, Bacon adapted it. Aristotle proposed that scientific evidence should be gathered by observation, but Bacon proposed that evidence should be gathered by observation and experiments. this is known as eliminative induction as it eliminates variable factors which might be present through mere observation.
Descartes' philosophy is based around doubt. he doubts everything, and can only establish his own existence through the presence of thought. This systematic doubt, and taking nothing for granted is, along with experimentation, the foundation of science.
The law of large numbers infers you will have 50% heads.
What would happen if you remove all animals from a pond ecosystem?
The fish wont be able to help the earth
Why Whatman filter paper no 40 is used in gravimetric experiments?
Whatman filter paper no. 40 is recommended for gravimetric quantitative analysis. Some characteristics are:
- flow rate: medium
- Herzberg filtration speed: approx. 340
- porosity: approx. 8 micrometers
- ash: max. 0,oo7 %
- thickness: 210 micrometers
- weight: 95 g/m2
What is a independent varible?
An independent variable is the part of an experiment that you control. You can change it and make it anything.
Such as an experiment dealing with the length of time it takes certain brands of chewing gum take to lose their flavor. The independent variable would be the brands of gum you decide to test, while the dependent variable would be the time it takes those brands to lose their flavor.
This phenomenon is an example of auditory pareidolia, where the brain perceives familiar patterns or meanings in random noise. In this case, the brain may interpret the irregular dripping of a leaky faucet as a rhythmic pattern due to our innate tendency to seek order and structure in our environment.
What can you write when your hypothesis is correct?
You write that the data supported your hypothesis.
