A lab report is a written report that records the purpose, method, process, and results of an experiment, and then organizes it and writes it. Here is my collection of lab report examples, feel free to check them out!
Make sound visiblePreparation : an empty can, a balloon, a pair of scissors, rubber bands, string, glue, flashlight, a lens slightly larger than a fingernail cap.
Experiment:
1, cut off the bottom and sides of the can, so that it becomes an empty cylinder with two transparent ends. Cut off the neck of the balloon and mask one end of the can. Grab the side of the balloon and tauten it with a rubber band (like a drum).
2. Glue a small lens onto the taut balloon drum so that the mirror faces outward.
3. Turn on the flashlight and shine it on the mirror, you will see a point of light reflecting off the mirror onto the wall. If the dot of light on the wall is not clear enough, you can use a piece of hard white paper as a screen.
4, put the tin can on the table, fixed with books and so on for support, adjust the flashlight, the mirror and the point of light at the right angle. You shout or sing at the other end of the tin can, while watching the point of light on the wall. The dot of light wiggles and "dances".
Principle : Sound is created by the vibration of air. When you sing, the air pressed out of your lungs causes the vocal cords to vibrate, creating a pressure wave (also called a sound wave). This sound wave hits the balloon membrane like ripples in water, and the balloon membrane vibrates with it, so the light reflected from the small mirror moves with it.
Cornering the current(a) Equipment to be prepared: A coconut party drink can inside. Plastic spoon, tap water.
(ii) how to operate the experiment:
First open the tap to adjust the water flow to the smallest, and then a coconut party drinks cans inside the plastic spoon on the clothes repeatedly rubbed a few times, the friction after the plastic spoon placed next to the water flow near the water flow.
(c) What happens:
The water stream seems to be pulled around a bend by the plastic spoon.
(iv) Why it happens:
It's because the plastic spoon is electrified when it rubs against the clothes, so the water flow is drawn to the spoon and appears to take a bend.
(5) how to think of:
Once, I ate a coconut party drink cans of drinks and pulp, nothing to take the can and spoon under the faucet to play with the water, accidentally spoon fell to the ground sticky dust, I picked up on the clothes to wipe off the dust, ready to take the spoon to catch the water, when the spoon close to the tap water, a strange phenomenon occurred, the spoon on the dust, the spoon is not a good idea, it is a good idea. Phenomenon occurred, the spoon seems to have a force to pull the water over. So I repeated the test several times have produced the same and the phenomenon, I designed this experiment.
(6) The place to pay attention : The spoon is close to the water flow, not touching the water flow.
Think: Without touching the bubbles, can you make the "fragile" bubbles grow bigger and bigger on their own?
Materials: scissors, straws, paper tubes, pots, soap water
Operation:
1. Prepare some strong soap liquid, so that the bubbles will not break easily.
2, use small scissors to cut 4 equally deep cuts at one end of the straw, and then fold the cut strips backward.
3. Use the end of the straw with the cut strips to blow a big bubble.
4. Moisten one end of the round paper tube in the center of the toilet paper with water, and quickly and gently place the soap bubbles on the moistened paper tube so that the bubbles stand firmly on the end of the paper tube.
5. Fill a basin half full of water and stick the end of the round paper tube without the soap bubbles down into the water.
6. Slowly press down on the paper tube until most of it is under water.
7. Repeat if the soap bubbles burst.
8, the soap bubbles will become bigger and bigger, and finally, "bang" a light sound, the soap bubbles broke.
Reason:
When the paper tube to the water under pressure, the air inside the tube by the pressure of the water, their own pressure will become larger, so that more and more air seeped into the soap bubbles above, the soap bubbles will be blown bigger and bigger.
Characteristics of a laboratory report
Correctness
The object of the writing of the laboratory report is the objective facts of scientific experiments, the content of the scientific, the expression of the real, pristine, appropriate judgment.
Objectivity
Experimental report to the objective facts of scientific research as the object of writing, it is the process of scientific experiments and the results of the real record, although it is also necessary to show that some of the questions of the viewpoints and opinions, but these views and opinions are put forward on the basis of objective facts.
Corroboration
Corroboration means that the results of the experiments recorded in the experimental report can be repeated and confirmed by anyone, that is to say, anyone who goes to repeat the top of the given conditions of the experiment, no matter when and where, can observe the same scientific phenomena, get the same results.
Readability
Readability refers to the complexity of the experimental process for the reader to understand, the writing of the experimental report in addition to the text narrative and description, but also often with the help of images, lists, graphs and other styles of illustrating the basic principles of experiments and the relationship between the steps, explaining the results of the experiment and so on.