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BIO120H1 Lecture : Bio lab 13 Feb 12 2010

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School
UTSG
Department
Biology
Course
BIO120H1
Professor
Ingrid L.Stefanovic

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BIO120H1 Full Course Notes
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BIO120H1 Full Course Notes
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Document Summary

Measurment error reflects the discrepancy between our repeated measurment and the ture value of the object being measured. Precision j is the repeatability of the measurement. If a single measurement when repeated shows little little variation, it ahs high precision, if it shows great variation, it has low precision. Accurancy j is the tendency for the measured value to be close to, or apporximate, the true accepted value. Measurement contain three parts j unit, scale factor and significant figures. T 5 j before is even j unchange odd j roung up. Qualitative: such as hair colour, sex or something something are easy to group. Use a table or a figure to presenting data. Dependent variable plot on y-axis, and independent variable plot on x-axis. Line of best fit: a line which travels through the space pccupied by most of the points. Interpolation: line of best fit allow us to predict the data that is not one of the plot points.

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Related Questions

determine the number of significant figer in the following measurment [ 12.3 ml and 2.3 g and 5.877 micrometer] then round the number 56.877 to the following number of significant figures [4 and 3 and 2]?
Develop a simple research design for the following researchquestion. For the design include the independent variable, thedependent variable, two possible controls, and 2 units ofmeasurement the researcher should use and what the unit should beused to measure.

What is the effect of the use of artificial, nutrient-rich plantfood on the height of pea plants?


Measurement LabReport

  1. Length Measurement

  1. What is the importance of the International System ofMeasurement?
  1. Based on lab, Section I, Exercise 1, how thick is a stack often dimes relative to a meter stick? Provide your answer incentimeters.
  1. What is the numeric relationship between millimeters,centimeters and decimeters?
  1. Metric Units

  1. The scientific notation for 2,600 is

  1. 500 centimeters equals metersor _ millimeters.

  1. 2080 meters equals _ kilometers or_ decimeters.

  1. Volume Measurement
  1. Draw and name three laboratory apparatus used to measurevolume. Sign, date and prepare an image of your drawing and includeit with this lab report.

  1. A laboratory procedure requires a measurement of 0.5 ml offluid to the nearest 1/10 ml. Which pipette should be used?

  1. Based on lab, Section III, Exercise 5 explain how to determinethe volume of a marble.

  1. Mass Measurement

  1. What is the difference between weight and mass?

  1. 50 Kilograms equals grams.

  1. Describe the procedure for determining the mass of a coin usinga triple beam balance.

  1. In the lab, Section IV, Exercise 7 determine the mass of abeaker and complete the table below. Here is a hint: the sum of themasses of the three beams equals the total mass of the beaker.

Middle beam mass

g

Back beam mass

g

Front beam mass

g

Total mass

g
  1. Temperature Measurement

  1. Your friend’s temperature is 39.5°C. Does this indicate aproblem?

  1. Convert 20°C to °F.

  1. If you measured the temperature of a glass of ice water with aCelsius thermometer, what would you estimate the temperature tobe?

Summary Questions

  1. Record the basic unit of metric measurement of each of thefollowing:

Length

Volume

Mass

Temperature

  1. Explain how the metric units for length, volume, and mass arerelated.

  1. What is the mass of 800 ml of water?

  1. Which metric units of length would most conveniently measurethe following:

Pen

Car

Ant

Dallas to San Diego
  1. An object is 24 cm long. What is the length in mm?

  1. What size pipette accurately measures 0.8 ml of fluid? Indicatethe volume and accuracy of the pipette.

  1. In most countries, gasoline is measured in liters. The volumeof one liter is approximately one quart. There are four quarts inone gallon. In Europe, gasoline costs $1.86/liter. How does thisprice compare with the cost of gasoline in the United States?Please show your work.
  1. Convert the following numbers to scientific notation.

-0.00125

80,200.0

7,231