Problem: Article: Do so by opening the white Adobe Acrobat app with the stylized, red A icon, clicking File in the menu bar at the top of the screen, clicking Open..., selecting the PDF document you want to convert to an image, and clicking Open. This will only work with the paid version of Adobe Acrobat Pro. If you haven't purchased Adobe Acrobat, you cannot use this method. It's in the upper-left side of the Adobe Acrobat window. On a Mac, click File in the upper-left corner of the screen instead. This green icon is in the top row of options here. Doing so opens the Export PDF window. On a Mac, select Export To in the File drop-down menu instead. It's in the middle of the page. On a Mac, select Image in the pop-out menu. Click the checkbox to the left of the type of image that you want to use. Popular image types include JPEG and PNG. On a Mac, click one of the image types (e.g., PNG) in the pop-out menu, then select a save location when prompted. Enter a new name for the file if you like, then click Save at the bottom of the pop-up window. This will save each of your PDF file's pages as its own individual photo.
Summary: Open a PDF document in Adobe Acrobat Pro. Click the Tools tab. Click Export PDF. Click Image. Select an image type. Save your file.

Problem: Article: In a study on empathy in pigs, researchers looked at how pigs responded when their pen mates were placed in stressful or potentially harmful situations. When one group of pigs were in danger or experiencing a threat, the other group responded with stress signals like pushing their ears back and becoming more alert. This indicates that pigs have the ability to show emotional contagion, where they share the emotional response that another pig is having, which is a key part to having the capacity for empathy. While you may not want to conduct your own test on animals, you can observe if the animal reacts when another animal appears in danger or under stress. The animal may respond with stress related noises or actions, such as a more alert or rigid body movements, cries or howls, and moving towards the animal under stress. In a study on empathy in elephants, a researcher observed an elephant mother who gave birth to a stillborn baby. The mother then guarded her dead calf for two days and tried several times to revive the dead calf's body. When the researcher offered the elephant mother water, the elephant drank the water and then touched her chest as if in a sign of mourning. Though elephants have been one of the more studied animals in terms of empathy, an animal may display empathy by trying to protect an injured animal from a predator. The animal may also respond to a dead animal by displaying signs of mourning over their body or to others, such as the elephant mother touching her chest. Often, animals of the same species will protect each other and respond to the needs of their herd or pack. You may observe animals working together to build a habitat, such as a den, or you may observe animals working as a team to capture a prey or elude a predator. These group related activities can be a sign of empathy among the animals, as they must focus on how their fellow animals are thinking and feeling and respond to it in kind.
Summary: Look to see if the animal reacts to another animal when they are stressed or in danger. Note if the animal responds to an injured animal or a dead animal in the area. Check if the animal works together with other animals.

Problem: Article: This will help generate a preview of the textbook so that you can approach the reading with a sense of its structure and main points. Keep things like the end-of-chapter questions in mind as you complete your reading. On this read-through, don't take notes or do anything else; just read. You have two objectives in doing so. The first is to get a sense of the purpose of the chapter. Ask yourself: what is the author trying to convey in the chapter overall? Second, how does the author build the information or argument in the chapter? When you have a mental picture of these two questions, you can then begin taking notes that will benefit you in your study for exams and research papers. Don't rush this step! It can be tempting to just get done with your reading as soon as possible, but you are unlikely to retain information if you hurry through. Notes do not mean taking every word down verbatim. The art of note-taking involves discerning what is important and engaging with the material rather than just copying text out. The first thing to write down is the main point or argument that the author is conveying in the chapter. Do this in no more than three sentences. Then ask yourself how the author begins to make this point. This is where the major headings and subheadings help. Under each heading are paragraphs that make up the section of the chapter. Document the topic sentences that help build the argument in the section and chapter. Don't be afraid to write in your book. Annotating a textbook by writing notes, comments, and questions in the margins near relevant material can be invaluable when studying. Hand write your textbook notes. Handwriting your notes forces your brain to actually engage with the material as opposed to glossing over the material or mindlessly typing the same text into the computer. Go back through the chapter and list major theoretical concepts and properties key to understanding any technical elements of the chapter. Also list key terminology with corresponding definitions. Often, this information will be printed in bold, italics, or set apart in a box or with some other eye-catching method. Begin by summarizing the chapter and its main points in your own words. This will tell you where your knowledge gaps are. Ask yourself questions about what you've read and the notes you took: What question does this information answer? and How does this information relate to other things? are good places to start.
Summary:
Use the optimizing techniques first. Read the entire chapter through. Take notes on your reading. Create a list of concepts and terms. Create a study guide from your notes.