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פתור תרגול זה עכשיו
Unit 1: The Ethics of Science
  • 1. The safety symbol used to indicate a toxic substance.
A) Broken flask
B) Fumes from a beaker
C) Skull and cross bone
D) Lab rat
  • 2. The safety symbol used to indicate a sharp object
A) All
B) A hand with a cut on the finger.
C) A pair of scalpels.
  • 3. The safety symbol used to indicate caution when working with open flames and secure any loose hair or clothing.
A) Flames
B) Frog
C) Goggles
D) Apron
  • 4. What safety symbol is used to indicate caution to protect your from electrical shock.
A) A broken flask
B) An electrical cord with lightening bolts
C) A Skull and Cross-bones
D) A lab rat
  • 5. You can perform an experiment on your own:
A) Whenever you want to
B) When you are sure it is safe to do so
C) Only with permission from the teacher
D) Never
  • 6. You may eat in the science lab:
A) When your stomach is growling
B) When you are sure it is safe to do so
C) Never
D) When the experiment smells delicious
  • 7. Keeping the work area neat and clean is important because:
A) It keeps the room from looking messy
B) You won't lose your supplies in the clutter
C) The teacher is a neat freak
D) It help prevent accidents
  • 8. Goggles must be worn when using
A) Chemicals
B) Sharp instruments
C) All
D) Fire
  • 9. You must tie back long hair and baggy clothes when:
A) Working with chemicals
B) Using Fire
C) Working with lab animals
D) All
  • 10. Which of the following is NOT a safe lab procedure?
A) Asking permission to leave your seat
B) Running through the lab with a beaker in your hand
C) Listening carefully to instructions
D) Wearing gloves and goggles when instructed
  • 11. What should you do if a glass breakage occurs?
A) Sweep it under your lab table
B) Clean it up quickly before anyone notices
C) Just leave it
D) Immediately contact your teacher
  • 12. When you need to use your sense of smell to make an observation you should
A) Take a good sniff
B) Stick your nose over the substance and take a small sniff
C) Carefully smell the substance
D) Waft the substance
  • 13. A ______________ is a tool used to measure the volume of a liquid.
A) Triple-Beam Balance
B) Graduated Cylinder
C) Beaker
D) Florence-Boiling Flask
  • 14. A ____________ is a tool used in science to magnify small objects and microscopic objects.
A) Test Tube
B) Graduated Cylinder
C) Microscope
D) Triple-Beam Balance
  • 15. A _____________ is a tool used to heat substance in.
A) Florence-Boiling Flask
B) Triple-Beam Balance
C) Graduated Cylinder
  • 16. A __________ is an instrument used to pick up test tubes.
A) Test tube holder
B) Tweezers
C) Plastic gloves
  • 17. A _________ is the tool used to measure the mass of an object.
A) Beaker
B) Triple-Beam Balance
C) Test tube Rack
D) Florence-Boiling Flask
  • 18. Another name for the metric system.
A) MGL
B) SM
C) SI
D) MS
  • 19. Unit used to measure long distances.
A) Kilograms
B) Kiloliters
C) Kilometers
  • 20. Unit used to measure short distances.
A) Centiliters
B) Hectometers
C) Centimeters
  • 21. 2000 mg=_____ g
A) 2g
B) 200g
C) 20g
  • 22. 15 cm=_____mm
A) .15mm
B) 150mm
C) 1500mm
  • 23. 5L=_______mL
A) 500mL
B) 50mL
C) 5000mL
  • 24. Basic metric unit for measuring mass.
A) Grams
B) Pounds
C) Liters
D) Meters
  • 25. Basic metric unit for measuring volume.
A) Grams
B) Liters
C) Meters
D) Ounces
  • 26. Basic metric unit for measuring length.
A) Grams
B) Meters
C) Inches
D) Liters
  • 27. When you are _____________, you use your senses to learn about your surroundings.
A) Communicating
B) Measuring
C) Classifying
D) Observing
  • 28. ___________ is the sorting or ordering of objects.
A) Measuring
B) Observing
C) Communicating
D) Classifying
  • 29. ___________ is the act of sharing your ideas with someone else.
A) Observing
B) Measuring
C) Communicating
D) Classifying
  • 30. The ________ _______ is a systematic approach to investigating a natural occurrence.
A) Scientific Method
B) Metric System
C) Process Skill
  • 31. The steps in the scientific method are:
A) Hypothesis-Experiment-Conclusion
B) Purpose/Question-Research-Hypothesis-Experiment-Collect and Analyze Data-Conclusion-Communicate Results
C) Purpose-Hypothesis-Experiment-Conclusion
D) Observation-Experiment-Conclusion
  • 32. The ________ variable in an investigation is the variable that is manipulated or changed by the experimenter.
A) Control
B) Independent
C) Dependent
  • 33. The ________ variable is the variable that make change due to the other variable being changed.
A) Dependent
B) Control
C) Independent
  • 34. True or False: It is OK to do your own experiment, as long as you do not get hurt.
A) True
B) False
  • 35. True or False: Safety is everyone's concern.
A) False
B) True
  • 36. True or False: You may decide not to wear safety goggles if they hurt your face.
A) True
B) False
  • 37. True or False: You do not need to report small accidents to the teacher.
A) False
B) True
  • 38. True or False: Horseplay is never allowed in a lab.
A) True
B) False
  • 39. True or False: The use of the scientific method is just for science, and does not apply to other areas of life.
A) True
B) False
  • 40. Mechelle saw Lauren and Kie'Asia in Pizza Hut, eating a mushroom pizza. Mechelle can make the Following INFERENCE
A) Lauren and Kie'Asia are at Pizza Hut
B) Lauren and Kei'Asia's favorite pizza is Mushroom
C) Lauren is eating pizza with Kie'Asia
D) Lauren and Kie'Asia are eating a mushroom pizza
  • 41. Khialiq is doing an experiment to answer the question 'which boils faster, salt water or tap water?". Which hypothesis best matches his question?
A) If I boil salt water and tap water in separate containers, the salt water will boil fastest.
B) Yes, salt water boils more quickly.
C) Salt water is usually warmer than tap water.
D) Yes
  • 42. SpongeBob noticed that his favorite pants were not as clean as they used to be. His friend Sandy told him that he should try using clean-O detergent, a new brand of laundry soap she found at Sail-Mart. SpongeBob made sure to wash one pair of pants in plain water and another pair in water with the Clean-O detergent. After washing both pairs of pants a total of 3 times, the pants washed in the Clean-O detergent did not appear to be any cleaner than the pants washed in plain water. What was the problem SpongeBob wanted to investigate?
A) SpongeBob's Water
B) SpongeBob's feeling for Sandy
C) SpongeBob's pants were not clean.
  • 43. Use SpongeBob Clean Pants Experiment to answer the following question: What is the independent variable?
A) How clean his pants would get.
B) SpongeBob needs to buy new pants
C) Laundry Soap
  • 44. Use SpongeBob Clean Pants Experiment: what is the dependent variable?
A) SpongeBob's feelings for Sandy
B) Laundry Soap
C) How clean pants would get.
  • 45. Use SpongeBob Clean Pants Experiment: What should SpongeBob's conclusion be?
A) Clean-O detergent does not appear to be effective
B) Detergent O laundry soap is effective and he should stock-up.
C) He should buy new pants.
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