Unit 1 Test Review - KEY Name

Unit 1 Test Review - KEY Name: Mrs. Peachee/AS Chem Date: Hr:

These are a list of topics that you should know for this unit’s test. The problem set is for you to use to practice. Unless otherwise stated answer the questions as the textbook asks.

1. How many sig figs in a number? (pg 51 #:’s 83a, 83b, 84a, 84b ) 83a. 431800 kg 83b.10240 mg 84a. 0.003221 g 84b. 3.88 kg

2. Write numbers into and out of scientific notation. (pg. 50 #:’s 75a, 75b, 76a, & 76b) 75a. 4.5834 X 10-3 mm 75b. 3.054 X 10-2 g 76a. 8348000 km 76b. 4302 g

3. Do calculations and report the answer with the appropriate sig figs. (pg. 51 #:’s 77a, 77f, 78a, 78b, 85c, 85g) 77a. 1.16 X 107 kL 77f. 2.14 X 102 mL 78a. 9.6 X 108 km2 78b. 9.99 X 10-9 m2 85c. 74.8 dm3 85g. 8.097

4. Differentiate between physical and chemical changes. (pg. 82 #:’s 39 all) 39a. physical 39b. physical 39c. chemical 39d. chemical 39e. chemical

5. Calculate the density of some material given appropriate data. (pg. 50 #:’s 72, 73, & 74) 72. 1 g/mL 73. 1.5 g/mL 74. 3.0 mL

6. Describe the scientific method. (Section 1.3) What are the steps in the process? 1. State the problem/Ask the question 2. Research the problem/question 3. Form Hypothesis 4. Test Hypothesis 5. Collect and Analyze Data 6. Conclusion

7. Experiment: Jesse is curious about how changing the # number of turns on a wind-up car would affect how far it travels across the kitchen table a. Write a hypothesis? The more turn the distance traveled will increase b. What is the independent or manipulated variable? # turns c. What is the dependent or responding variable? distance

8. Can you tell what different metric units would measure? (Section 2.1) Can you use appropriate prefixes with these metric units? (Try this exercise – put the appropriate unit in the blank.)

mL milliliter mg milligram L Liter cm centimeter

kg kilogram mm millimeter km kilometer g gram

m meter µg microgram nm nanometer 9. 1. Colas may be purchased in two or three liter bottles. 2. The mass of a bowling ball is 7.25 kg . 3. The length of the common housefly is about 1 mm . 4. The mass of a paper clip is about 1 g . 5. One teaspoon of cough syrup has a volume of 5 mL . 6. The length of the small intestine in man is about 6.25 m . 7. Viruses such as AIDS, polio, and flu range in length from 17 to1000 µm . 8. Adults require 1000 mg of calcium to meet the U.S. RDA. 9. The mass of a proton is 1.67 X 10-18 g . 10. Blue light has a wavelength of about 500 nm . 11. Myoglobin, a protein that stores oxygen, has a mass of 2.98 X 10-14 µg . 12. Buttery popcorn contained in a large 1 L bowl has a mass of about 50 g of fat & about 650 calories. 13. The human heart has a mass of about 1.05 kg . 14. The distance from your nose to your outstretched middle finger is about 1 m . 15. The body mass of a flea is about 0.5 mg and it can jump about 20 cm high.

10. How about the metric prefixes? Do you know them? (pg. 51 #:’s 79a, 79b) 79a. 1000 g = 1 kg 79b. 1 kg = 1000 g

11. Can you assign appropriate units when performing calculations with measurements? (pg. 51 #:’s 78a, 78b) 78a. 9.6 X 108 km2 78b. 9.99 X 10-9 m2

12. Think lab safety. Do you know safe procedures? (Give the 5 most important) Never eat or drink Waft to smell chemicals Always wear goggles 25 min to rinse eyes with chemicals Tell teacher about accident 5 min to rinse skin/clothing with chemical

13. Can you interpret data from a graph? (pg. 53 #:’s 7, 8 & 9 on pg 53) 7. a 8. a 9. d

14. Can you differentiate between chemical properties and physical properties? (pg. 82 #:’s 37 all) 37a. physical 37b. physical 37c. chemical 37d. physical 37e. chemical 37f. physical

15. Describe different techniques for separating different kinds of mixtures? (Check out the section 3.3. – READ PAGES 68 & 69) SEE TEXTBOOK OR NOTES

16. Can you do conversions from one metric unit to another showing your work? (pg. 51 #:’s 80a, 80b, 80f) 80a. 5.70 X 103 mg 80b. 0.0437 m 80f. 37.5 kg/L

17. a. Define qualitative and quantitative, give example of each Qualitative observations, non-numeric often observations made with your senses - the shirt is green Quantitative Observations- numeric observations the mass was 89.9 grams

b. Define intensive property and extensive property, give example of each Intensive – independent of amount present – density, boiling point, melting point Extensive – dependent of the amount present - mass, length, distance

18. Given an experiment with data collected, can you create a data table and graph the data? Take the experiment in question 7 and make a data table, without actual data, and a graph, without the graph. Make sure your data table has three titles and units in the titles Make sure your graph has all eights parts and the IV is on the x axis and DV is on the y axis