Bio 11- lab 2- measuring with metric PDF

Preview

Summary

Bio 11- lab 2 – measuring with metric- lab, questions, review and thought questions!!!!!...

Description

Bio 11- lab 2 – lab, questions, review and thought questions!!!!! 

How many centimeters are represented? Depends on the ruler provided



How many mm are in a centimeter? 10



Use the ruler to measure the diameter of the circle shown to the nearest mm. bioDiameter of circle in mm: 38 mm



You have shown that the diameter of the circle is 38 mm = 38,000 um = 38,000,000 nm.



How many centimeters are in a meter? 100



How many millimeters are in a meter? 1,000



the prefix milli- means a thousand.



if the bone measures from the 22 cm mark to the 50 cm mark, the length of the bone is 28 cm. If the bone measures from the 22 cm marks to midway between the 50 cm and 51 cm marks, its length is 27.5 cm = 285 mm



2g = 2,000 mg and 0.2 g = 200 mg



Block weight will vary – Got 27g = 2700mg



Experimental procedure for volume will vary



Potential hypothesis for volume- If we could find the volume of the test tube by viewing where the water rises after placement of the item in the graduated cylinder and measure the difference of the water before and after



Fill a 50 ml graduated cylinder with water to about the 20 ml mark. Hypothesize how you could use this set up to calculate the volume of an object. You could use this setup to calculate the volume



The object, graduated cylinder, has a volume od 20 ml



Hypothesize how you could determine how many drops from the pipette of the dropper bottle equal to 1 ml. You can determine how many drops from the pipette by slowly measuring from 20 ml to 21 ml



How many drops from the pipette of the dropper bottle equal 1 ml? approximately 10 (Answers will vary with technique and with the pipette type)



Are pipettes customarily used to measure large or small volumes? small



Water freezes at 32°F= 0°C.



Water boils at 212°F=100°C.



Human body temperature of 98°F is what temperature on the Celsius scale? 37°C



Answers will vary for number three of temperature experimental procedure



What system of measurement is used in science? Metric



Which types of measurements were examined in this lab? Length, Weight, volume, temperature



What is the base unit for length? meter



19mm equals how many cm? 1.9 cm



880mm equals how many m? 0.880m



What instruments are used to observe objects smaller than a millimeter? Microscope



What is the base unit for mass? Gram



What instrument is used to measure mass? Scale



2,700 mg equals how many grams? 2.7 grams



One ml is equal to how many cubic centimeters? 1 cm cubed



3.41 equals how many ml? 3,400 ml



To properly measure 20 ml of water what must be at the 20 ml mark of the graduated cylinder? Meniscus



Which temperature scale is used in science? Celsius



22 C equals how many degrees F? 71.6 F



Describe the advantages of using the metric system you discovered during this lab? More precise measurements



Explain how you would measure the volume of a solid object such as a rock. , Measure water out in ml, drop the rock in the water and measure the difference in a graduated cylinder.



Why is it advantageous to use a standard measurement system in all sciences? Because all units are a measurement of 10...