You should attach the red (positive) terminal first.  Next, attach the black (negative/ground) terminal.
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One-sentence summary -- Re-attach your battery terminals.

Q: A hypothesis is a testable statement about a scientific process and the way it works that is made based on a researched topic. It is usually phrased in an “If this, then that” statement. For example, in an experiment about the growth height of a plant in different light levels, your hypothesis might be: If plants need light to grow, then they will not grow as high in low light or no light conditions. Once you have chosen a topic and made a hypothesis, you need to design an experiment that will properly test that hypothesis. Remember that you will need to conduct the experiment several times throughout the project to ensure the results are accurate. Consider things such as, how will you answer your question? What materials will you need for the experiment? Is there a specific order in which you need to do everything before it will work? How many times do you need to repeat the experiment before you start to see a pattern in the results?  Answering these questions will help you make a materials list and develop a clear procedure. Make sure your experiment can be performed safely or with adult supervision. The procedure is a step-by-step list that details everything you need to do to answer your scientific question. A proper procedure should allow someone to duplicate your experiment exactly without asking any questions. Each step should be clear and only require one action. If a step requires too many things, it should be broken up into multiple steps.  Write the steps with an action verb at the beginning, such as “Open the container.” Avoid statements such as, “I opened the container.” Let a parent, sibling, or classmate read your procedure and see if they have any questions. Add more steps if necessary. Look over your procedure and determine what items you will need to execute the experiment. Make the list very detailed so you aren’t in the middle of an experiment when you realize you’re missing something important.  If an item is particularly cheap or fragile, you might want to gather extras just in case you need them. Take all of the necessary safety precautions before starting the experiment. Follow your detailed procedure to actually do the experiment. Prepare as much as you can beforehand and have all of your materials nearby so you can get to them when you need them. Have your lab notebook on hand so you can make observations and take notes during the process.  Make a note if you altered the procedure in any way during the actual experiment. Take pictures during the experiment to use on your display board. Write down all of your observations and results as you go along. If you have a short experiment, keep good notes on exactly what you did and what results you obtained. Not all experiments can be completed the same day. If you are doing a long-term experiment, like growing plants, make daily observations about the plants and how they’re changing.  Keep all of your observations and data in your lab notebook. For long-term experiments, date each observation so you know exactly when you made it. There can be a lot of variability that occurs during an experiment. To account for this variability, scientists perform the same experiment multiple times and average the data of each trial together. Repeat your experiment at least 3 times. If you are doing a multi-day experiment, use multiple replicates in 1 experiment. For example, start an experiment with 3 plants in different light conditions. Use plants with the same starting height or just subtract the original height at the end.
A: Make a hypothesis. Design your experiment. Write a procedure. Gather the necessary materials. Perform the experiment. Record observations during the experiment. Repeat the experiment.

Article: During this time, suits were becoming more narrow - with slim "cigarette leg" pants and a sack coat shape (like a Brooks Brother's suit). Charcoal grey was a popular color for men's suits. Note: a white shirt was usually worn with this grey suit, along with a plain, narrow tie. Before the war, all men wore hats. But moving into the '50s, hats became less and less popular. Why? Because men were driving more and hats were bothersome to wear while in the car. For men, there were many situational fashions that were worn at certain times by certain types of people. Khaki and plaid shirts or button-down collared oxford cloth shirts were seen on students. T-shirts were seldom worn alone because they were considered an undershirt. Hawaiian shirts and box shirts were worn in the summer. Slim-legged cigarette pants were a popular men's style during this time period. Jeans were typically used for outdoor wear, but many teenagers wore them more regularly. Bermuda shorts were often worn in the summer. In the 1950s, most men wore Oxford shoes (often two-toned), saddle shoes, or chukka boots. Saddle shoes are two toned (usually black and white) leather shoes with a flat heel. They are typically a white shoe with a black decorative "saddle" in the middle section. Chukka boots are ankle-high leather boots that typically only have 2-3 pairs of holes for lacing the shoelace. Hair was worn short, in a post-military style. Men started to wear their hair longer at the end of the decade, but it was still groomed to stay off the ears. Some men also went for the longer, greased pompadour. Elvis Presley made this hairstyle famous in the 1950s.
Question: What is a summary of what this article is about?
Wear a fitted suit. Ditch the hat. Pay attention to the trends for shirts. Know what pants were in fashion. Find the right shoes. Know the hairstyles for men.