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Name:_________________________________________________________Date:___________________Period:______ Unit 1 Review – Physical Science Show work and units: 1. What is the density of an object with a mass of 60 g and a volume of 2 cm3? 2. If you have a rectangular gold brick that is 2 cm by 3 cm by 4 cm and has a mass of 48 g, what is its density? 3. If a block of wood has a density of 0.6 g/ cm3 and a mass of 120 g, what is its volume? 4. What is the mass of an object that has a volume of 34 cm3 and a density of 6 g/ cm3? 5. Observation or Inference: Place an O for Observation or I for Inference on the space. _______ The sandwich smells nasty. _______ The girls looks 14 years old. _______ Mr. Yancey is the principal of Westerville North High school. _______The school is on County Line Road in Westerville, Ohio. _______A dog is the best pet to have. 6. Three items you use for safety in this science lab are: a) _______________________________________________________ b) _______________________________________________________ c) _______________________________________________________ 7. To smell a chemical in a science lab, you _______________ the odor toward your nose. 8. What are the two types of observations a person can make? a.) ________________________________ b.) ________________________________ 9. In what format do you write a title on a graph? __________________________________________ 10. The density of water is equal to __________________________ (don’t forget to include your units!) 11. One cubic centimeter equals _________________________ mL. 12. What is the base unit for measuring each of the following? Volume _____________________ Mass _______________________ Length ____________________ 13. What is the area of an office that is 15 meters by 12 meters? 14. Draw an example of a line graph showing each of the following: Direct relationship between two variables Indirect relationship between two variables No relationship between two variables 15. What is the volume of box that is 5 cm by 8 cm by 2 cm? 16. What does DRY MIX stand for? 17. What is the metric ladder? Write it below. 18. Name a tool to measure the mass of a paperclip. ___________________________________________ 19. Name a tool used to measure the length of the hallway. ______________________________________ 20. Name a tool used to measure the volume of a bottle of Gatorade. ______________________________ 21. Why do things float in water? Be very specific about your answer. 22. In the following scenarios identify the independent variable, dependent variable, control, and one constant. A researcher is curious to find out what effect classical music has on people’s level of relaxation (as measured by heart rate). He suspects that listening to classical music will make people feel more calm and relaxed. He lets one group listen to classical music for one hour. He lets another group sit in a quiet room for one hour (i.e they hear no music). After one hour, he monitors the heart rate of each participant to measure their level of relaxation. Independent Variable: Dependent Variable: Control: Constants: A psychology teacher allowed his third period class to eat snacks while taking an exam. His fourth period class was not allowed to eat snacks while taking the same exam. He compared the test averages from both classes. Prior to this, both classes averaged comparable exam scores. Independent Variable: Dependent Variable: Control: Constants: The leading producer of paper products wants to increase their sales of paper cups. They set up a test program in local supermarkets. Identical 8 ounce paper cups were packaged in two ways—half of the stock was packaged in the present plain boxes, while the other half of the stock was packaged in bright, cheery, pastel-colored boxes. Sales volumes for each type of package were recorded over a period of six months. Independent Variable: Dependent Variable: Control: Constants: Question: Does the mass of a wooden block affect the density? Design an experimental procedure to test the question above. Assume you have multiple size blocks made of the same type of wood to use in your experiment. Now use the following rubric to grade your own procedure. On a scale of 1 -5, how well did you write your experiment? Characteristic of a Good Procedure Is it reproducible? Is only one independent variable being changed at a time while all other variable are held constant? Is it clear how the dependent variable will be measured? Are there a sufficient number of trials? Is there a control trial? Score (1 point each)