Multiple Choice: Read each question or statement. Place your answer on the answer sheet. (2 points)
1. Which of the following IS NOT a general safety rule that students should follow?
A. Never do a lab activity unless your teacher is present. B. Tie back long hair. Tuck neckties into your shirt. C. Never eat, drink, chew gum, or apply cosmetics in the laboratory. Do not store food or drinks in the lab area. D. Run, push, play, and fool around in the laboratory.
2. Which of the following IS a correct rule to follow when using heat and fire?
A. Leave hot plates, lit Bunsen burners, and other hot objects unattended. B. Don't use Pyrex glassware for heating. C. Never reach over an exposed flame or heat source. D. When heating in an open container, point the open end of the container toward yourself and others.
3. Which of the following IS a safety rule for working with chemicals?
A. Never smell substances without specific instruction. Avoid inhaling fumes directly. B. Touch and taste substances in the laboratory as you feel like it. C. Return unused chemicals to the stock bottles. D. Wash your hands only if they get ink on them after working with chemicals.
4. Which of the following IS a correct activity by a student?
A. A student sniffed a bottle of ammonia. B. A student removed his safety goggles to better see what he was doing. C. A student picked up broken glass with a brush and dustpan. D. A student reached over a lighted Bunsen burner in order to turn off the gas.
5. A general safety rule IS to A. Perform a lab activity when your teacher is not present.
B. Locate and learn to use all laboratory safety equipment. C. Leave your equipment and work space dirty after you finish a lab. D. Perform a lab before you read all parts of the activity. Don't pay attention to safety cautions.
6. When using laboratory equipment A. Use chipped or broken glassware. B. Keep your hands away from sharp or pointed ends of scalpels, scissors, dissecting probes, or needles. C. Aim the mirror of a microscope directly at the sun. D. Force glass tubing or thermometers into a rubber stopper or twist the glass once it is in a stopper.
7. When working with specimens A. Treat live animals gently. Be aware that animals can injure you or spread disease. B. Cut a specimen for dissection while holding it in your hand. C. Open containers of live microorganisms whenever you choose to. D. Dispose of live or preserved specimens directly into the regular trash as you finish the activity.
8. When using electrical equipment A. Use equipment with frayed cords, loose connections, or broken wires. B. Store flammable materials near electrical equipment.
C. Let cords dangle over a table edge in a way that allows equipment to fall if the cord is tugged or causes a person to trip. D. Never jerk wires from outlets or pull appliances out by the cord.
9. When reporting accidents A. Leave spills until it is convenient for you to clean them up. B. Wash off chemical spills on your skin or clothing immediately with plenty of cool water while calling to your teacher. C. Only tell your teacher about an accident or injury if you feel like it. D. Pick up broken thermometer pieces with your bare hands.
10. A student working with hot acid should have on
A. no protection clothing B. goggles only C. apron only D. goggles and apron
Matching: Place the letter that best defines the numbered term in the correct place on your answer
sheet. (5 points)
A. conclusion 11. Proposed explanation for a problem or observation
B. control 12. A set of activities designed to test a hypothesis
C. data 13. Measurements
D. experiment 14. Experiment with variable left out
E. hypothesis 15. Result of laboratory activity
A. observation 16. Factor being tested
B. problem 17. An organized approach to solving problems
C. research 18. Gathering information about the subject of the activity
D. scientific method 19. What the person performing the activity sees, hears, feels, smells, or tastes
E. variable 20. Question that the laboratory activity is designed to solve
Reading and Interpreting: Read the following passage and answer the questions. (2 points)
Jason was tired of jeans that didnŐt fit. Some bigger pairs of jeans didnŐt shrink as he wanted them to, and others shrank too much. So he decided to do an experiment to test shrinkage in different kinds of jeans. First, he bought his favorite, exorbitantly priced all-cotton jeans in the right size. These would be his control. Then he collected the following five pairs of pants: 1) another pair of jeans identical to the control pair 2) a pair like the control but prewashed, 3) a regular pair of inexpensive polyester jeans, 4) a prewashed pair of polyester inexpensive jeans, and 5) a prewashed pair of cotton/polyester jeans.
Jason knew that heat could shrink fabric. He decided to measure the width and length of the jeans and then wash them all in hot water. He would measure them, put them in a hot dryer, and measure them again.
21. According to the passage A. heat causes fabric to shrink B. heat causes fabric to stretch
C. heat fades fabric D. heat does not affect fabric
22. According to the passage, what problem is Jason attempting to solve?
A. Which kind of jeans will shrink less in heat? B. Which kind of jeans is least expensive?
C. Which kind of jeans are in fashion? D. What types of materials are jeans made of?
23. In the passage, what is meant by the word exorbitantly? A. expensively B. cheaply
C. inexpensively D. reasonably
24. Based on the details of JasonŐs experiment, what do you think his hypothesis might be?
A. if jeans are all cotton, then they will shrink the most.
B. If jeans are prewashed, then they will shrink the most.
C. If jeans are washed, then they will shrink.
D. if jeans are cotton/polyester, then they will shrink the most.
25. What does the article attempt to explain? A. how to use the scientific process to solve a problem
B. why jeans shrink C. what jeans are best to buy D. how to wash and dry jeans