Holt Science and Technology
Elements, Compounds, and Mixtures
Welcome to Holt Science and Technology. In this chapter, you will learn about elements and how they are assembled into compounds and mixtures with differing properties. Use the links below to find learning tools that will help you review the chapter and extend your study.
Review and Practice
Reading Skills: K-W-L
This worksheet will help you organize your thoughts before and after you read the chapter or an article.
Science Puzzlers, Twisters & Teasers: Elements, Compounds, and Mixtures
If you are looking for challenging puzzles that use terms and concepts from the chapter, give this worksheet a try!
Labs You Can Eat: An Iron-ic Cereal Experience
Extract iron from a breakfast cereal to explore the difference between a mixture containing metallic iron and an iron compound. Before you begin this lab, please read the safety information given in the Reference Materials section on the Home Page!
EcoLabs & Field Activities: Ozone News Zone
Create a news program about stratospheric ozone. Tape the program and air it as a public service announcement on the school's intercom or television. Before you begin this lab, please read the safety information given in the Reference Materials section on the Home Page!
Science Skills: Introduction to Graphs
There are several different types of graphs. Which one should you use? Learn more here.
Math Skills for Science: Using Proportions and Cross-Multiplication
What are the purposes of proportions and cross-multiplication? Find the answer here.
Math Skills for Science: Parts of 100: Calculating Percentages
Learn how to use ratios to compare numbers to 100.
Math Skills for Science: Percentages, Fractions, and Decimals
Find out how to do compare percentages, fractions, and decimals.
Quiz Yourself: Elements, Compounds, and Mixtures
Click here to test your knowledge of elements, compounds, and mixtures.
Enrichment and Extension
Internet Activity: A Physical Science Fairy Tale
Use the internet and library resources to find out more about methods for separating mixtures. Then write a fairy-tale in which the main character is asked to separate two substances. Rather than resorting to magic, however, have the character use science and common sense to meet his or her goals.
Long-Term Projects and Research Ideas: A Coin-cidence?
Do you need ideas for long-term projects or research projects? Check out topics such as properties of metals used in coins, gold alloys, the way gelatin is made, and mixture-separation techniques.
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Holt Anthology of Science Fiction: The Strange Case of Dr. Jekyll and Mr. Hyde
When Dr.Jekyll mixes his "salts" and drinks his chemical mixture, he changes his life–and Edward Hyde's—completely. After reading Robert Louis Stevenson's story, see if you can answer these questions.
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