Summarize the following:
Choose text that is large and clear to see. Make sure that it is visible from the back of the room you'll be presenting in. It should be clear, easy to read and not blending into the background used. The references can even be placed below the slide, making them easily findable should you send the slides to people by email. They make it hard to read the text. If you feel you must use a picture as a background, use a transparency behind your text so it is easy to read, and have your text and your transparency contrasting colors. To do this, right click the text box, click on format placeholder, and change the fill to a color and make it transparent. (Around 70-80% transparency works well) On the other hand, pictures in the background catch the reader's attention and makes your presentation look professional. However, make sure that the words contrast with the background. Also, find large pictures that aren't blurry. Try searching up vector. Remember the 5 by 5 rule. Five bullets with less than 5 words each. Please, no long paragraphs or slide long quotes! Don't over-exaggerate your animations, slide-ins work really well for bullets. Don't try to mix it up because then it will look sloppy. Note: just because you should stick to one slide transition does not mean that you should only stick to one animation.

summary: Use the appropriate size for the text. Instead of citing your sources all on one slide, cite the sources you referenced as you present them throughout the PowerPoint presentation. Try not to use pictures as a background. Use graphs and tables to show your information often, but not too often. Use short sentences and phrases, keep your text short. Only use animations for emphasis. If you use slide transitions, stick to only one.

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Making your tone of voice friendlier requires you to be aware of how fast you talk and how high and low your voice gets. Use strong breaths from your abdomen for better control. To check if you're breathing from your diaphragm (the muscle that sits right below your lungs), watch yourself in the mirror while you breathe in. If your shoulders and chest rise, you're taking shallow breaths without using your diaphragm. Practice using your diaphragm by placing your hand on your abdomen and pushing it outward while you breathe in. Don't speak in a monotone voice. Instead, make your voice both high and low as you talk. Stressing important words in your sentence with a higher pitch reassures listeners, while lower pitches can inject calmness into your conversation. End questions on a higher pitch and statements on a lower pitch. If you end statements with a high pitch, you'll sound like you don't believe what you just said. The best way to keep up a friendly tone is to have varied pitches while you talk. You don't want to have a totally high-pitched conversation, as people might think you just inhaled a helium balloon. A completely low-pitched conversation, however, could make your listener think you're uninterested in your chat with them. When you speak too quickly, you sound like you just want your conversation to be over and done. Instead, speak slowly to allow your listener to hear every word you say. This will tell them you actually want to be there talking to them. You don't need to take thirty seconds to get out every word. Be aware of your speed, and you'll naturally slow down. Add some pauses to let your listener keep up with you. There's nothing worse than feeling like you're being yelled at by someone. Keep your voice at a level that allows people to hear you without shouting at them. Breathing from your diaphragm will help with this problem. These controlled breaths let everyone hear you without making you work too hard to push out the sound. Any time you're struggling to make yourself heard, you're probably going to end up shouting, which won't sound friendly. If you're not clearly articulating every syllable of each word, your listener might not understand you. Worse, they may think you're saying something they can't hear on purpose. This could make them confused and frustrated. Practice good articulation by saying tongue twisters to yourself for five minutes each morning or night. For example, say these as fast as you can while still keeping the words clear: "James just jostled Jean gently. Jack the jailbird jacked a jeep," "Kiss her quick, kiss her quicker, kiss her quickest," and "The shrewd shrew sold Sarah seven silver fish slices." Use your smartphone or a camera to take a voice recording or video of you while you speak. Pay close attention to the pitch, speed, and loudness of your voice. Make improvements after each new recording.

summary: Breathe from your diaphragm to control your voice. Vary your vocal pitch. Speak slowly to keep people engaged. Use a softer voice to avoid sounding aggressive. Avoid mumbling to keep your listener from getting confused. Record yourself to practice your changes.

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If you're taking gas (like helium) from a tank, place the lip of the balloon tightly over the nozzle and fill it up. Or, if you want to measure air, just blow up the balloon using your mouth. Tie the end of the balloon in a tight knot when you're done. Wrap a cloth tape measure around the center of the balloon to check its circumference. To get the radius of your inflated balloon, place a ruler on each side of the center of the balloon, measure the distance between them, and divide it in half. For instance, you place your balloon between two rulers and find that the distance is 10 centimetres (3.9in). Divide this in half to get the radius, 5 centimetres (2.0in). Plug in your measurements into the basic formula for the volume (V) of a sphere, V = 43r3{\displaystyle {
rac {4}{3}}\pi r^{3}}. Plug the radius into the formula to get your sum. For instance,: V = 4353{\displaystyle {
rac {4}{3}}\pi 5^{3}}, or about 523.33 cm3{\displaystyle ^{3}} or 206.04 in3{\displaystyle ^{3}}. Place the lip of a balloon over a faucet and carefully run water into it. Stop when the balloon is the same size as the balloon filled with gas. If you accidentally put too much water in, carefully pour some out. It will be difficult to get the balloons to exactly the same size. To be more exact, wrap a cloth tape measure around the center of the water balloon to check its circumference. Adjust until it's the same as the gas-filled balloon's. Have someone help you measure the circumference of the water balloon while you hold it. Empty the balloon into a large measuring cup, beaker, or something else that can measure volume. Record the amount of water that was in the balloon. The volume of water will equal the volume of gas in the other balloon. If your water-filled balloon is the same size as the gas-filled balloon that you determined (via V = 43r3{\displaystyle {
rac {4}{3}}\pi r^{3}}) had a volume of 523.33 cm3{\displaystyle ^{3}}, then you should measure about 523 milliliters (18floz) of water poured out of it (1 ml = 1 cm3{\displaystyle ^{3}}).
summary: Inflate a balloon with the gas you want to measure. Measure the balloon's circumference and radius. Use the volume of a sphere formula. Fill up another balloon with water to compare your results. Pour the water out and measure it.