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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
Bakelite is rigid because the polymer chains are cross branched. For one chain to slide past another they have to be broken.
Mass is measured by using what?
Weight assuming your talking about the force pulling us to the ground is measured in newtons. To find out the amount of newtons an object has you measure its mass(kilograms,grams etc.) and multiply its mass by 10. Example if a book had a mass of 1kg its weight is 10N.
Rudolf Virchow! He was a BAMF! Seriously though, he is one of a few scientists credited with the cell theory. This states that cells arise from existing cells. This would end up disproving spontaneous generation, which was believed for many years earlier.
What is the texture and consistency of DNA?
The DNA is in the shape of a double helix, two strands twisted together like a ladder. The sides of the ladder is made up of the sugar phosphate portions of the adjacent nucleotides bonded together.
The phosphate of one nucleotide is covalently bonded to the sugar of the next nucleotide.
The nitrogenous bases on either sides of the DNA stands join together to form the rung of the ladder. Each base pair is formed from complimentary nucleotides, purines with pyramidines bound together by hydrogen bonds.
The base pairs in DNA are adenine with thymine and cytosine with guanine.
protect the heat effect from the sun
Where are fossils mostly preserved?
Most fossils are found in sedimentary rock, which is the most common type of rock on Earth. Sedimentary rocks form when particles of sediment are deposited by water or wind, and then hardened over time.
What are the three systems that make up vascular plants?
Xylem, Phloem, Cambium are the 3 main structures of vascular plants forrealzys
What are horizontal movement of air?
What is Horizontal movement of air resulting from local changes in temperature
What is the difference between linear and non linear sensors?
Linear Pipeline
Non-Linear Pipeline
Linear pipeline are static pipeline because they are used to perform fixed functions.
Non-Linear pipeline are dynamic pipeline because they can be reconfigured to perform variable functions at different times.
Linear pipeline allows only streamline connections.
Non-Linear pipeline allows feed-forward and feedback connections in addition to the streamline connection.
It is relatively easy to partition a given function into a sequence of linearly ordered sub functions.
Function partitioning is relatively difficult because the pipeline stages are interconnected with loops in addition to streamline connections.
The Output of the pipeline is produced from the last stage.
The Output of the pipeline is not necessarily produced from the last stage.
The reservation table is trivial in the sense that data flows in linear streamline.
The reservation table is non-trivial in the sense that there is no linear streamline for data flows.
A single Reservation table is needed for the evaluation of different functions.
Multiple Reservation tables can be generated for the evaluation of different functions.
What components should a good scientific experiment contain?
(1) singularity - it tests only one variable in the situation (2) reproducibility - it can be re-done by other scientists to verify the results (3) utility - the answer matters to human life in some way While most would agree with the first two elements of a "good experiment" listed above, I'm not sure you would find much consensus on the concept of "utility." Whether the result of an experiment is ultimately deemed "useful" to human life has little bearing on the methodology and scientific rigor with which an experiment is conducted. On the other hand, some would say that scientific integrity ("honesty") is a necessary ingredient in any good experiment, while others would say that a good experiment must either prove or disprove a hypothesis...which is, after all, the whole point of conducting the experiment in the first place.
What is the heaviest hydrocarbon fraction produced by fractional distillation?
The heaviest fractions of crude oil are used for tar and/or asphalt.
Is hairspray an element compound or mixture?
it's a mixture of compounds
Maybe a mixture, but it can be pure (made out of one substance). Defenitely NOT an element.
E.g. Beeswax is a mixture but spermacetiwax is (almost) pure:
Spermaceti consists principally of cetyl palmitate (the ester of cetyl alcohol and palmitic acid), C15H31COO-C16H33.
How do you separate broken Glass water and salt?
You filter the mixture using a filter paper. By this the salt solution will get separated from glass bits. Then you take the salt solution and heat it. The water will get evaporated leaving salt behind.
What is the lightning rod experiment?
It is when you walk outside holding a golf club or other metal object during a thunderstorm. Place the handle end of the golf cloub into the ground away from trees and your house. Move at least twenty feet away and watch.
P.S. for a more exciting experiment hold the golf club in your hand.
P.S.S Just joking about the P.S.
When the switch is closed it means that?
There is a complete path for the electricity to flow. The opposite of an open circuit. If a light switch is on and the light comes on, the circuit is closed. If the switch is turned off, the light goes off because the circuit is open.
What happens if you put water on snow?
Yes. Water vapor in the air can condense (like the water that forms on your cold glass of soda) and fall. If the temperature is warm, the water falls as rain. If the temperature is cold enough, the water freezes and falls as hail or snow.
What kind of sedimentary rocks form from minerals dissolved in water?
Chemical sedimentary rocks, such as limestone and salt rocks, form from minerals dissolved in water that accumulate and solidify through processes like evaporation or precipitation. These rocks are typically composed of minerals that were previously dissolved in water and then re-crystallized to form solid rock.
What are 2 ways scientists share results?
Science is by definiton: the intellectual and practical activity encompassing the systematic study of the structure and behavior of the physical and natural world through observation and experiment
Therefore, scientific results are verifiable through repetition. The scientific community only values results when the process, variables, math, and conclusions are overturned for the entire community to review. This advances the study of the physical and natural world.
Results are generally published in research magazines such as Science Magazine.
Why do some paper towel soak up more water then other paper towel?
certain fabrics are more absorbent than others. if you compare the paper towels at your school (probably) that are made of semi-absorbent paper, there won't much liquids picked up.
if you take something like Bounty which is made up of extra-absorbent fibers, there will be much more absorbency done.
it all depends on the brand and materials used.
What happens if a cell is placed in a beaker containing isotonic solution?
If a cell is placed in an isotonic solution, there will be no net movement of water across the cell membrane. The concentration of solutes inside and outside the cell will be equal, so the cell will maintain its normal shape and size as there is no osmotic pressure acting on it.
Can hot water dissolve more salt then room temperature water?
yes, Because the warmer the water is the closer it is to gas form and so therefore the particles are moving at a faster rate and have more successful collisions with the salt particles making the salt dissolve faster.
Colder water is closer to solid form and the particles move at a slower rate and have less successful collisions and therefore don't bump into salt particles as often making the salt dissolve at a slower rate.
The warmer the water is the more activation energy there is to encourage the water to begin reacting with the salt and dissolve it.
