To return to the chapter summary click Escape or close this document. Chapter Resources Click on one of the following icons to go to that resource. Image Bank Foldables Video Clips and Animations Standardized Test Practice Chapter Review Questions Chapter Summary nc7.msscience.com

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To return to the chapter summary click Escape or close this document. Foldables Make the following Foldable to help you stay focused and better understand scientists when you are reading the chapter.

To return to the chapter summary click Escape or close this document. Foldables Draw a mark at the midpoint of a sheet of paper along the side edge. Then fold the top and bottom edges in to touch the midpoint.

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To return to the chapter summary click Escape or close this document. Foldables As you read the chapter, list the characteristics of the four major divisions of scientists under each tab. Classify

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To return to the chapter summary click Escape or close this document. 1 1 Science is a process that can be used to solve problems or answer questions. Communication is an important part of all aspects of science. What is Science? Scientists use tools to measure. Reviewing Main Ideas Technology is the application of science to make tools and products you use each day. Computers are a valuable technological tool.

To return to the chapter summary click Escape or close this document. 2 2 No one scientific method is used to solve all problems. Organization and careful planning are important when trying to solve any problem. Doing Science Scientific questions can be answered by descriptive research or experimental research. Reviewing Main Ideas Models save time and money by testing ideas that are too difficult to build or carry out. Models cannot completely replace experiments.

To return to the chapter summary click Escape or close this document. 2 2 A hypothesis is an idea that can be tested. Sometimes experiments don’t support the original hypothesis, and a new hypothesis must be formed. Doing Science In a well-planned experiment, there is a control and only one variable is changed at a time. All other factors are kept constant. Reviewing Main Ideas

To return to the chapter summary click Escape or close this document. 3 3 Science is part of everyone’s life. New discoveries lead to new technology and products. Science and Technology Science continues to challenge old knowledge and ways of doing things. Old ideas are kept until new discoveries prove them wrong. Reviewing Main Ideas

To return to the chapter summary click Escape or close this document. 3 3 People of all races, ages, sexes, cultures, and professions practice science. Science and Technology Modern communication assures that scientific information is spread around the world. Reviewing Main Ideas

To return to the chapter summary click Escape or close this document. Chapter Review Question 1 Answer _______ are rules that describe a pattern in nature. The answer is laws. Scientists use theories and laws to predict what will occur in investigations.

To return to the chapter summary click Escape or close this document. Chapter Review Question 2 Answer _______ is the application of science to make products or tools that people can use. The answer is technology. Computers are an example of technology. NC: 1.09

To return to the chapter summary click Escape or close this document. Chapter Review Question 3 The system of measurements used in this table is called the _______. NC: 1.06

To return to the chapter summary click Escape or close this document. Chapter Review Answer The answer is International System of Units, or SI. Scientists around the world use this system, allowing them to understand each other’s research and compare results. NC: 1.06

To return to the chapter summary click Escape or close this document. Chapter Review Question 4 This system uses certain metric units based on units of ______. A. one B. five C. ten D. twenty NC: 1.06

To return to the chapter summary click Escape or close this document. Chapter Review Answer The answer is C. Using units of ten make multiplication and division easy to do. NC: 1.06

To return to the chapter summary click Escape or close this document. Chapter Review Question 5 Which describes a control? A. a sample that is treated like the other experimental groups except that the independent variable is not applied to it B. the factor be measured C. the variable that is being changed D. none of the above NC: 1.04

To return to the chapter summary click Escape or close this document. Chapter Review Answer The answer is A. Experiments would not be valid without the use of a control. NC: 1.04

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 1 Which best describes this illustration? A. data table B. example of a journal entry C. hypothesis D. problem solving steps using scientific methods NC: 1.01

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer The answer is D. Scientific methods are ways or steps to follow to try to solve problems. NC: 1.01

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 2 Which is a way scientists avoid bias? A. jump to conclusions B. give only partial information to match the results you want C. use numerical measurements for all data D. use selected samples NC: 1.06

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer The answer is C. Good investigations avoid bias. Using careful numerical measurements for all data is a way to avoid bias. NC: 1.06

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 3 Which is NOT a common way to organize data? A. chart B. graph C. on a note card D. table NC: 1.08

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer The answer is C. Although you can keep track of processes, observations, and data on note cards, it is not a common way to organize all the information you gather. NC: 1.08

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 4 Which is a science skill? A. classifying B. interpreting C. observing D. all of the above NC: 1.05

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer The answer is D. The more you practice these skills, the better you will become at using them. NC: 1.05

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 5 This is an example of a _______. A. chart B. graph C. science journal D. table NC: 1.06

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer The answer is D. A well- planned investigation includes ways to record results and observations accurately. Data tables are one way to do this. NC: 1.06

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