The Great Tomato RaceStarter: 9.11.07 Pg. 4

• What do we already know about ketchup?• What are we trying to find out?• What are we going to do to find our

answer? • What variable are we going to change on

purpose?• How will we know if our experiment is

working? • What do you think is going to happen?

Experimental Design Objectives 8.22.07

• Students will be able to conduct a simple scientific investigation.

• Students will be able to communicate designs, procedures, observations, and results of scientific investigations.

• Students will be able to identify the independent variable, dependent variable, and the constants in an experiments.

• Students will be able to develop a hypothesis related to the topic or information provided.

The Great Tomato RaceAgenda 9.11.08

• Read the experiment• Take up “Color of Pears Assignment”• Select your roles• Safety and Clean Up• Collect your materials• Get started (You will have 30 minutes to

complete the activity)• Complete the Experimental Design Ditto

“Questions 1-9)• Complete parts 10-14 for homework

• Clean up • Dismissed

The Great Tomato RaceStarter 8.21.07

On page 4 of your composition notebook, complete the following starter.

1. Read the experiment on the great tomato race. In three sentences, summarize the entire experiment.

2. In this experiment, which role do you think you would be best at performing? (recorder, time, stage, leader)

Roles and Responsibility• Recorder

• Records the data • Makes sure that everyone in the group is

recording the same information. • Time Keeper

• Keeps up with the time• 5 min. (Organization)• 25 min. (Complete Lab and Record Data)• 5 minutes (Clean Up Areas)

• Stage• Makes sure the group has the correct

materials• Makes sure that all of the materials are in

the correct tray when finished• Makes sure that the plates are clean

Materials for each group

• 3 cups; labeled hot, cold, and room temperature

• 3 rulers• 3 paper plates with a

start and finish line• 1 liter of water at

each station • 9 packets of ketchup

per group

• 1 pair of tongs if needed

• 1 cup of ice• Use of second of

clock in the front of the classroom

• Hot or warm water (Heat up water bottles)

Before You Leave 8.21.07

• Clean your areas• Complete the Class Data Chart

that’s taped to the door that leads to the science storage room.

• I need this data for our lesson on 8.23.07

Planning for the experiment

• I need a total of 380 packets of ketchup (66) Need: 314

• I need to be able to warm up at least 9 bottles of water to 100 degrees Fahrenheit. (Thermometer, stand, and a clip)

• Set up the plates with a start and finish line.