Directed Reading B. Section: Tools and Models in Science TOOLS IN SCIENCE MAKING MEASUREMENTS. is also know as the metric system.
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1 Skills Worksheet Directed Reading B Section: Tools and Models in Science TOOLS IN SCIENCE 1. What is a tool? a. anything with a handle b. anything that gives off energy c. anything that requires electricity d. anything that helps you do a task (pp ) 2. Which of the following is NOT something that tools are used for? a. to evaluate the importance of science b. to collect data c. to evaluate and analyze data d. to take accurate measurements 3. List four examples of tools used for taking measurements. 4. List three examples of tools that help you analyze or communicate data. MAKING MEASUREMENTS 5. List two examples of units of measure used many years ago. 6. A simple and reliable measurements system called the is also know as the metric system. 7. Why is changing from one unit to another easy when using the SI system of measurement? Holt California Physical Science 18 Data in Science
2 Match the correct description with the correct term. Write the letter in the space provided. 8. a measure of the size of an object or region in three-dimensional space 9. the ratio of the mass of a substance to the volume of the substance a. mass b. temperature c. volume d. density 10. a measure of how hot or cold something is 11. a measure of the amount of matter in an object Match the correct description with the correct term. Write the letter in the space provided. 12. the basic SI unit of length 13. the basic SI unit of mass 14. a unit used to express liquid volume 15. a unit used to express the volume of larger solid objects a. kilogram b. liter c. meter d. cubic meter 16. A cubic meter is equal to 1, What unit of measure is used to express the volume of smaller objects? 18. How is density calculated? 19. Name three units that are used to measure temperature. Holt California Physical Science 12 Data in Science
3 MODELS IN SCIENCE 20. What is a pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept called? a. a test b. a model c. a hypothesis d. a scale 21. Which of the following uses something familiar to help you understand something that is not familiar? a. a model b. a tool c. data d. a test 22. List the three common types of scientific models. 23. List three examples of a physical model. 24. What type of model tries to put many ideas together to explain or summarize something? Holt California Physical Science 13 Data in Science
4 Match the correct description with the correct type of model. Write the letter in the space provided. 25. used to predict the weather 26. used to explain why the universe seems to be expanding 27. used to help understand how a real space shuttle blasts off into space a. conceptual model b. physical model c. mathematical model 28. What can happen if a mathematical model contains a wrong value for a single variable? 29. What are models often used to represent? 30. Give one example of a model that is used to learn about things that cannot be seen. 31. Why is a model always limited in its usefulness? USING MODELS FOR SCIENTIFIC PROGRESS 32. Which of the following is NOT a way that models are used by scientists? a. Models are used to communicate difficult information. b. Models can make a molecule easier to visualize. c. Models are used to validate inaccurate data. d. Models can be used to summarize new information. 33. A system of ideas that explains many related observations and is supported by a large amount of scientific evidence is called a(n) a. model. c. variable. b. law. d. theory. Holt California Physical Science 14 Data in Science
5 34. Why do scientists use models in their search for new information? 35. A descriptive statement or equation that reliably predicts events under certain conditions is called a(n). 36. What may happen when scientists make new observations that seem to show that a theory is wrong? 37. Define law. 38. What does a law tell you, and what does a law not tell you? 39. What law says that the total mass of materials formed during a chemical change is the same as the total mass of the starting materials? Holt California Physical Science 15 Data in Science
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