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Chemistry. Matter and Change by McGraw-Hill Education

By McGraw-Hill Education

Glencoe Chemistry: subject and alter © 2008 combines the weather scholars have to be successful! A entire process learn designed for a first-year highschool chemistry curriculum, this application accommodates gains for robust math aid and problem-solving improvement. New beneficial properties for 2008 contain content material prepared round subject matters, mammoth principles, and major principles, selling scholar comprehension and trying out luck; extra review suggestions than ever; Dinah Zike's FOLDABLES, three-d image organizers that aid scholars grab details for evaluate and retention; the most recent in Glencoe lecture room expertise, and lots more and plenty extra!

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Sample text

Much of matter and its behavior is macroscopic; that is, you do not need a microscope to observe it. You will learn in Chapter 3 that the tremendous variety of stuff around you can be broken down into more than a hundred types of matter called elements, and that elements are made up of particles called atoms. Atoms are so tiny that they cannot be seen even with optical microscopes. Thus, atoms are submicroscopic. They are so small that one trillion atoms could fit onto the period at the end of this sentence.

1 helps you decide what size bottle to buy. Notice that the label uses a number and a unit, such as 500 mL, to give the volume. 9 fluid ounces. Fluid ounces, pints, and milliliters are units used to measure volume. Système Internationale d’Unités For centuries, units of measurement were not exact. A person might measure distance by counting steps, or measure time using a sundial or an hourglass filled with sand. Such estimates worked for ordinary tasks. Because scientists need to report data that can be reproduced by other scientists, they need standard units of measurement.

2. 5 cm. Use a graduated cylinder to measure 1 mL of vegetable oil, then add it to the petri dish. 3. Dip the end of a toothpick into liquid dishwashing detergent. 4. Touch the tip of the toothpick to the water at the center of the petri dish. Record your detailed observations. 5 cm. colorings in four different locations on the surface of the milk. Do not put a drop of food coloring in the center. 7. Repeat Steps 3 and 4. Analysis 1. Describe what you observed in Step 4. 2. Describe what you observed in Step 7.

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