UEN Security Office
Technical Services Support Center (TSSC)
Eccles Broadcast Center
101 Wasatch Drive
Salt Lake City, UT 84112
(801) 585-6105 (fax)
Main Curriculum Tie:
Background For Teachers:
These activities are best done by small groups of 3-5 students. It is important that each group has access to a scale that can accurately measure 1-gram increments. If scales are not available, the activities can be done as a teacher demonstration.
Intended Learning Outcomes:
Invitation to Learn:
From the large ball of clay, break off a smaller ball for each team, and have the class list the properties of the smaller balls. (Students should notice that all the properties of the clay are the same except the size and weight of each ball has changed.) Have each team weigh their ball of clay and report its weight. Record the weights on the board.
Collect all the clay and mold it back into a large ball. Ask the teams to put their heads together and decide what they think the large ball of clay weighs. Have teams report the weight and explain how they arrived at it. Record responses. Weigh the clay and compare the weight to the teams' guesses and the weight of the original ball of clay. (The re-formed ball of clay will probably weigh less than the original ball because some of the clay will remain on the students' hands or desk tops. Ask the class to explain why the re-formed ball weighs less.) Tell the class they are going to further investigate the relationship between the weight of the whole and its parts.
After students have completed the activity, have the teams share with the class what they have learned. Discuss the statement: “The weight of the arts is always equal to the weight of the whole.” Is this statement always true? Can you think of a time when it may not be true? Can it be tested? How? What are some investigations that you could do to test the statement? You may wish to allow students to set up other investigations to test the statement.
shavings (bag holding shavings) + used pencils + graphite and erasers not collected = total new weight of pencils.
Have students fill in the values and solve for the graphite & erasers.
Use this rubric to assess your students ' performances:
Student 's Name ____________________________________
Created Date :