F23_lab1_worksheet

.docx

School

Ivy Tech Community College, Indianapolis *

*We aren’t endorsed by this school

Course

101

Subject

Mathematics

Date

Jun 22, 2024

Type

docx

Pages

8

Uploaded by irismagalyhernandez

G117 Laboratory One Science: Observation and Measurement Name: Course/Section: Objective : Learn how to make observations and measurements and work through the Scientific Method. For this lab, we will use the scientific method to determine which of three objects is the most dense. Density is weight per unit volume. Materials : Pencil, ruler, graduated cylinders, water, scale, and objects to observe and measure. Observations : A. You have three objects. Make at least three observations for each. Fill out the table below. Object 1 Object 2 Object 3 Observation 1 Observation 2 Observation 3 This is a/an … Hypothesis : B. Based on your observations, which do you think will be the densest? That is, which of these do you think is the heaviest for its size? (You don’t have to be correct!) Measurements : C. Length . A meter is the base unit of length in the SI system. Based on the longest part of each object, how many meters long is each? (Note: Measure in centimeters then convert to meters. These will be small numbers!) Fill out the table below. Length (cm) Conversion Factor Length (m) Object 1 Object 2 Object 3 ACTIVITY 1.1 Observations and Measurement
D. Volume . Method 1: A liter is the base unit of volume in the SI system. Volume is the amount of space an object occupies. For our three objects, we can estimate the volume by measuring the length, width, and depth of each object in centimeters then multiply these lengths together go get a volume in cubic centimeters (cm 3 ); a cubic centimeter is the same volume as a milliliter. Measure all three sides of the object: the longest side, the second longest side, and the third longest side. None of your objects are perfect cubes, so just make your best estimation of the longest, second longest, and third longest side. Fill out the table below. Length 1 (cm) Length 2 (cm) Length 3 (cm) Estimated Volume (cm 3 ) Object 1 Object 2 Object 3 E. Volume . Method 2: An easier way to do this is the use a graduated cylinder to measure the volume of water each object displaces. To do this follow these instructions. (1) Based on your understanding of accuracy, precision, and detection limit, choose a graduated cylinder that you think would best measure the volume of your object. (2) Fill the graduated cylinder at least half way with water. Record this volume by looking at the point nearest the bottom of the meniscus, the curved surface of the water. A meniscus forms in a graduated cylinder because water sticks to the sides of the tube. (See figure to the right.) (3) Drop your object into the graduated cylinder. Record the new volume. (4) Subtract the new volume from the original volume to calculate the volume of your object. (5) Repeat for all objects and fill out the table below. Original Volume (mL) Volume with Object (mL) Volume of Object (mL) Volume of Object (cm 3 ) Object 1 Object 2 Object 3
F. Weight or Mass . We need to measure the mass or heaviness of the objects. We can do this by using a scale. Make sure that the scale is “zeroed” and set to grams before you attempt to weigh your objects. Note that the scales are pretty finicky, so you will want to measure each object at least three times and obtain an average mass. Fill out the table below. Mass 1 (g) Mass 2 (g) Mass 3 (g) Average Mass (g) Object 1 (1) Object 2 Object 3 G. Density . Finally, we can calculate the density of our objects. Density is the mass per unit volume. While volume is normally measured in milliliters (mL), when reporting density, it is shown as a mass per cubic centimeter or g/cm 3 . Fill out the table below. Average Mass (g) Volume (cm 3 ) Density (g/cm 3 ) Object 1 Object 2 Object 3 Summary and Conclusion : Given your observations and measurements, would you accept or reject your hypothesis? (Circle one.) ACCEPT REJECT Which object is the most dense? (Circle one.) Object 1 Object 2 Object 3
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help