Article: An experiment is a test, or series of tests, to disprove your hypothesis. If the experiment fails to disprove your hypothesis, that means that it may be suitable for making predictions about the question you have posed. If the experiment disproves your hypothesis, it means that the hypothesis does not accurately predict the outcome of the situation. You might decide that your experiment will be to shop at Store A and Store B and compare the money you spent at each store. Once the experiment is laid out, you will need to carry out the steps. It is important not to carry out the experiment with bias. The scientific method does not allow for tweaking the experiment to make the results fit what you want. For example, you must commit to buying the same foods at each store for a fair comparison. You should not buy the name brand at Store A, and the off brand at Store B to draw the conclusion that Store B is cheaper. In this scenario, the foods serve as your control and the stores are your variables. Sometimes, experiments do a poor job of testing the hypothesis. When this happens, you have to troubleshoot your experiment. Ask yourself what went wrong, and how can the next experiment address these issues. For example, you could compare receipts from each store and think that you are saving $15 per week, but you only notice an extra $5 per week leftover. Upon a closer investigation, you realize that you have to buy extra gas each week to get to Store B, and that detracts from your savings. At this point, you would need to redesign your experiment to include gas receipts as well.
Question: What is a summary of what this article is about?
Design an experiment. Carry out the experiment. Troubleshoot if necessary.
Article: While you can remove the doors to paint them, leaving them in the door frame makes the job easier. Protect your floors by spreading a plastic tarp out under the doors. You can purchase a tarp at a home improvement store or wherever else paint supplies are sold. Cardboard and other absorbent scrap material can be used as a makeshift tarp. If your doors have any marks or dents, now is the time to take care of them. Rub the spot to wear away the material around it. Keep doing this until the damage disappears, then sand the surrounding areas to blend them in and smooth out the finish. If you still have trouble with these spots, try using rougher sandpaper or an orbital sander. Lightly rub the sandpaper against the doors to even them out and ready them for new paint. Go over every surface, including ones you treated with heavier sandpaper. The doors should look smooth and even once you are done. When sanding, always start with the coarser sandpaper. Then use the finer sandpaper to smooth the surface. Fill a bucket with about 1USgal (3.8L) of water. Mix in about a tablespoon of an all-purpose dish soap. Your regular dish soap works fine unless it is designed for harsher stains like grease. The water temperature doesn't matter too much. To stay safe, keep it cool or lukewarm. Dip a clean microfiber cloth into the soapy water. Get the cloth damp but not dripping. Squeeze out any excess water first, then thoroughly wipe the doors to remove all of the grime, oil, and sawdust that has accumulated over time. Get another microfiber cloth and go back over the doors. They have to be completely dry. This second pass should finish removing all of the grime that can ruin the paint job. Move onto priming right away while the doors are clean.
Question: What is a summary of what this article is about?
Lay a tarp under the doors. Buff damaged spots with 120 to 150 medium-grit sandpaper. Smooth the doors with 180 to 220 fine-grit sandpaper. Create a mild cleaning solution with dish soap and water. Dampen a cloth in the solution and wipe down the surface. Dry off the doors with a clean microfiber cloth.