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# Rolling Away - PowerPoint PPT Presentation

Rolling Away. Mrs. Walker’s Second Grade Class. Problem. Does the mass of the ball affect the distance a ball travels?. Hypothesis

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Presentation Transcript

Does the mass of the ball affect the distance a ball travels?

If we roll 3 different balls down the same ramp to measure the distance it rolls, then we think the metal ball will go the farthest distance because it has more mass than the other two.

Independent variable: We used different types of balls.

Constant: We used the same ramp for each trial.

• Meter Stick

• Metal Ball

• Wooden Ball

• Styrofoam Ball

• Balance Scale

• Place your ramp on the ground.

• Roll the metal ball down the ramp and record the distance.

• Repeat step 2 two more times and record the distance.

• Roll the wooden ball down the ramp and record the distance.

• Repeat step 4 two more times and record the distance.

• Roll the styrofoam ball down the ramp and record the distance.

• Repeat step 6 two more times and record the distance.

To determine the average distance traveled for each ball, we added the total distance for all three trials and then divided the total by three.

Distance- Centimeters

• In our hypothesis the majority of the class (20 students) predicted that the metal ball would roll the farthest and they were correct. The 4 students that voted that the wooden ball would go the farthest were incorrect.

• All three balls have the same shape yet their mass is different. The styrofoam ball had the least amount of mass, and the metal ball had the most amount of mass.

• We concluded that the metal ball went the farthest because its mass was the heaviest out of the three balls.

• http://www.discoveryeducation.com

• These educational videos define what mass is and how it can be measured.

• Comparing Mass

• Measuring Mass

• Introduction to Mass

http://www.brainpopjr.com/math/measurement/gramsandkilograms/preview.wemlThis educational video explains how mass can be measured in grams and kilograms.

https://www2.houstonisd.org/Curriculum/SCI2_1213_Unit3_Properties_of_Matter

This website provides resources (videos, books, lessons) regarding mass.