Q: Different forms are used in different ways.  Chewing tobacco consists of loose, sweetened tobacco leaves that are sweetened. You put a wad of the tobacco between your cheek and gum and hold it there, sometimes for hours at a time. It's also called chew and chaw. Snuff is finely ground or shredded tobacco leaves. It's available in dry or moist forms and is packaged in tins or tea bag-like pouches. A pinch of snuff is placed between the lower lip and gum or cheek and gum. Dry forms of snuff can be sniffed into the nose. Using snuff is also called dipping. Plug is chewing tobacco that has been pressed into a brick shape, often with the help of syrup, such as molasses, which also sweetens the tobacco. You cut or bite off a piece of the plug and hold it between your cheek and gum. You spit out the tobacco juices. Twist is flavored chewing tobacco that has been braided and twisted into rope-like strands. You hold it between your cheek and gum and spit out the tobacco juices. Snus (the "u" is pronounced like the "e" in "news") smokeless, spit-less tobacco product. It comes in either a pouch or as a moist loose form that you stick between your upper lip and gum. You leave it in your mouth for about a half-hour or more without having to spit, then discard it. Dissolvable tobacco are pieces of compressed powdered tobacco, similar to small hard candies. They dissolve in your mouth, requiring no spitting. They're sometimes called tobacco lozenges, but they're not the same as the nicotine lozenges used to help you quit smoking. There are many brands of chewing tobacco on the market today, which range in price and flavor. Some of the most popular are:  Copenhagen is a premium tobacco made by U.S. Smokeless and the most expensive moist tobacco on the market. It comes in flavors like Natural, Straight, Bourbon, Whisky, and Smooth. For a beginner, it may be best to start out with the Long Cut version of Copenhagen as it packs more easily and will stay together in your mouth as you get accustomed to chewing. Skoal is known for its high quality and variety of flavors, including Apple, Peach, and Wintergreen. Fruit flavors are good for a beginner chewer as they are milder than the mint varieties. Timberwolf is value-priced, high quality tobacco. It comes in flavors like Apple, Peach, Mint, and Cool Wintergreen. Grizzly is considered “floor tobacco” for it’s very cheap price. It comes in Mint and Wintergreen and is not recommended for beginners because of its high nicotine content. You might be surprised at what dangerous chemicals are found in smokeless tobacco products.  Smokeless tobacco contains a number of cancer-causing chemicals such as polycyclic aromatic hydrocarbons (PAH), polonium–210 (a radioactive element found in tobacco fertilizer) and nitrosamines.  Chewing tobacco contains sugar, which leads to tooth decay and gum disease. It also contains salt (sodium), which raises blood pressure. Of course, smokeless tobacco products also contain the addictive substance, nicotine. Just like cigarettes, chewing tobacco is regulated by the Food & Drug Administration (FDA), so you will be required to prove you are 21 years or older before you can purchase chewing tobacco.
A: Note the different kinds of smokeless tobacco. Be aware of the brands of chewing tobacco available. Learn about the chemicals in chewing tobacco. Have your state-issued identification ready when purchasing chewing tobacco.

Q: You can use any sturdy bench or chair, such as a workout bench or even a park bench. Sit on the edge of the bench and put a hand down on either side of your legs. Your hands should be about shoulder-width apart. Straighten out your arms. Place your feet flat on the ground with your knees at a 90-degree angle. Squeeze your core muscles to tighten them. Move yourself off the front edge of the bench and use your arms to lower yourself down toward the floor. Don't go all the way down. Dip down enough that your elbows end up at a 90-degree angle. As you dip, make sure your body stays upright. Look straight ahead to remind yourself not to dip your head while you're performing a dip. Also, keep your elbows close to your body. When you reach the bottom of the dip, stay there for a couple of seconds. That will force your arm muscles to work harder while you hold yourself in place. Once you've held the position, move your body back up, keeping your core tight as you do. At the top, lock your elbows momentarily. Keep going for the whole set, doing 8 to 10 reps at a time. When you move your body down, try to do it in slow motion. Moving more slowly works your muscles harder.  Try 2-3 sets at a time. For a variation, straighten your legs out in front of you instead of bending at the knees.
A: Get into position with a bench behind you. Tighten your core and lower your body off the bench. Keep your head and upper body straight. Hold the dipped position for 1-2 seconds before pushing back up. Move yourself up and down without returning to the bench.

Q: Any microscope will do, but a compound microscope is the best kind for observing microscopic, transparent specimens, such as dust mites. You can buy a compound microscope online or from a retailer that sells them to schools, hospitals, and research organizations.  You can also acquire a cheap microscope with a 10x magnification lens from a toy store, hobby store, or thrift store. You need to use at least 10x magnification when viewing dust mites under a microscope. Using a clear piece of tape, pick up clumps of dust from surfaces such as shelves or the floor. Put the tape on the slide under the lens of the microscope with the power set to at least 10x magnification.  Dust mites are 0.3 millimetres (0.012 in) in size, so they can’t be seen with the naked eye. Use a lint-free, microfiber cloth to handle the slide to avoid getting fingerprints on the glass. Carry the slide between your thumb and forefinger by its sides rather than by the top and bottom. The stage is located at the front of the microscope under the objective lenses. It’s a flat, square platform with metal clips on it for holding slides. Gently lift the clips and close them over each end of the slide to hold it in place. Don’t force the slides under the clips, as they are fragile and can be easily broken. A power switch on the bottom controls the light. Use the dimmer switch by pushing it forward and backward to adjust the lighting. Adjust the light intensity to low with the dimmer switch at the bottom right of the microscope. When you turn the microscope on, increase the light intensity to a level that isn’t too bright or too low. A ring-like object called the diaphragm lets you control the amount of light that reaches the specimen. You can rotate this with your hand to adjust the amount of light under the specimen. It’s located under the stage. You can rotate it by simply turning it with your fingers. This is the level at which dust mites can be seen. If the dust mites are still out of focus, increase the power objective until you see them clearly. They have long hairs along the edges of their bodies and short hairs all over their bodies. They don’t have eyes or antennae.  Under a microscope, you’ll see dust mites crawling all over one another. Dust mites’ mouths resemble heads.
A:
Obtain a compound microscope with 10x magnification. Collect samples of dust and put them on a slide. Put the slide under the stage clips. Plug in the microscope to turn on its light. Rotate the nosepiece to the 10x power objective. Look for clear, oval-shaped arachnids with rigid bodies.