Learning Targets Explain the difference between a manipulated variable and responding variable Explain why controlled variables are important in an experiment Write a conclusion based on evidence from my experiment

MSP Inquiry Scenario

Let’s have a quick review of a controlled experiment ! Watch this quick video

Procedure: 1.Use the tape to mark a starting line on the floor. 2. Set the toy truck system at the starting line. 3. Put the 10-g block into the back of the toy truck system. 4. Turn the key on the toy truck 15 times and let go. 5. Measure and record the distance the toy truck system and block travel as Trial Repeat steps 2 through 5 two more times as Trials 2 and Repeat steps 2 through 6 for the 20-g block and the 30-g block. 8. Find and record the average distance the toy truck system traveled carrying each block mass.

Let’s Analyze The Inquiry Question & Experiment! “How is it put together?”

What do we know from the introduction to the experiment paragraph? Toy Truck (Title) Directions: Use the following information to answer questions 4 through 10. (Directions) The toy truck with a key is a system. Damien and Bailey wondered if adding blocks to the toy truck system would affect the distance traveled. They did the following controlled experiment. They are doing a controlled experiment? Why is that important? In a controlled experiment you can only have one manipulated (changed) variable. All other variables are unchanged. This important to be sure that the changed variable is what is effecting the responding (measured) variable – They give you the manipulated (changed) variable in the paragraph: “adding blocks” and the responding (measured) variable “the distance the toy truck would travel” – This is a cause and effect experiment. If I change the amount of blocks (increase/decrease) then it will affect the distance the truck travels (increase/decrease) – Cause----changing the amount of blocks (manipulated or changed variable) – Effect---- measuring the distance the truck travels

What does the inquiry/scientific question tells us? Question: What is the effect of blocks with different mass (10 grams, 20 grams, and 30 grams) on the distance a toy truck system with the block will travel Can you identify the manipulated (changed) and responding (measured) variables from the question? Manipulated Variable – blocks with different mass (10grams, 20 grams, 30 grams) Responding Variable – Distance a toy truck system will travel

What about the prediction? Prediction: The toy truck system carrying the 10 gram block will travel the farthest distance Again we see the manipulated (changed) variable and the responding (measured) variable This is a cause and effect relationship: If _______ Then____ – If I change the mass of blocks (10 grams, 20 grams, 30 grams) the truck carries Then the trial using the 10 gram block will travel the farthest – The manipulated( changed) variable is the cause and the responding (measured) variable is the effect!

Materials list Materials: toy truck system 3 blocks: 10 grams (g), 20 g, 30 g tape Meterstick The materials give you the 3 different blocks with 3 different mass values. These will be the manipulated (changed) variable The materials give you a measuring tool (meterstick) to measure the responding variable (distance the toy truck system travels)

In an inquiry experiment it is important to give a labeled setup diagram of the experiment This will help others to repeat the experiment the way the materials and procedures explain

What can we find in the procedures? See if you can find the manipulated (changed) variable, the responding (measured) variable, and any controlled (kept the same) variables Procedure: 1. Use the tape to mark a starting line on the floor. 2. Set the toy truck system at the starting line. 3. Put the 10-g block into the back of the toy truck system. 4. Turn the key on the toy truck 15 times and let go. 5. Measure and record the distance the toy truck system and block travel as Trial Repeat steps 2 through 5 two more times as Trials 2 and 3. Repeated trials for accuracy 7. Repeat steps 2 through 6 for the 20-g block and the 30-g block. (here are the 2 other mass values for the manipulated(changed) variable) 8. Find and record the average distance the toy truck system traveled carrying each block mass. Responding (measured) variable Controlled variable *responding variable set up: Starting pt. to measure Responding (measured) variable 1 st value of MV

Manipulated VariableResponding Variable Manipulated Variable Responding Variable

Assessment Can’t I just copy the data table from the experiment into the conclusion? Nope! You have to EXPLAIN the data in the table to support the answer to the question. Be sure to include the data from the lowest and highest value for the manipulated variable

Question: What is the effect of blocks with different mass (10 grams, 20 grams, and 30 grams) on the distance a toy truck system with the block will travel? Conclusion checklist: Did I clearly and accurately answer the experiment question? Did I include evidence that supports my answer from the data table? If averages are provided, did I use them? Does the evidence include the lowest and highest values of the manipulated variable from the data table? Did I use explanatory language to explain the data?

Step 1: Did I answer the experiments question clearly and accurately ? Question: What is the effect of blocks with different mass (10 grams, 20 grams, and 30 grams) on the distance a toy truck system with the block will travel? Step 1 : Answer the question! The data table shows that the lower the mass, the greater the distance the toy truck system traveled. (*opposite is true) Now time for step 2: Support the answer with evidence! Mass increases Distance traveled decreased

Step 2: Support answer with evidence from data table ? Lowest value of manipulated variable Lets look at step 2: The data table shows that the lower the mass, the greater the distance the toy truck system traveled. With the 10 gram block, the toy truck traveled 425 centimeters (*lowest). With the 30 gram block the toy truck traveled 360 centimeters. (* highest). Greatest value of Manipulated Variable

Step 3: Explanatory language The data table shows that the lower the mass, the greater the distance the toy truck system traveled. With the 10 gram block, the toy truck traveled 425 centimeters (*lowest). With the 30 gram block the toy truck traveled 360 centimeters. (* highest). Explanatory language: With the 10 gram block, the toy truck traveled 65 centimeters more than the 30 gram block. The data shows that when the mass increased, the distance traveled decreased.

The complete conclusion (4 point answer) The data table shows that the lower the mass, the greater the distance the toy truck system traveled. With the 10 gram block, the toy truck traveled 425 centimeters. With the 30 gram block the toy truck traveled 360 centimeters. With the 10 gram block, the toy truck traveled 65 centimeters more than the 30 gram block. The data shows that when the mass increased, the distance traveled decreased.

Did they Hit The Learning Targets? *conclusion scoring practice

Conclusion Scoring Rubric 4 points Your conclusion should include:Points Answer to the experiment’s question Cleary & correctly answers the question * Did you explain the manipulated variables effect on the responding variable? 1 point Supporting data/evidence Lowest condition of the manipulated variable 1 point Supporting data/evidence Highest condition of the manipulated variable 1 point Explanatory Language Explains the relationship of the data (compares, cause and effect) 1 point

Damien and Bailey set up another experiment to test if their starting point would affect the distance the toy truck system would travel. Analyze their experiment’s procedures and explain if their data would be valid? Procedures: 1.Use a the tape to mark the starting line on the floor 2.Set the toy truck system at the starting line 3.Put the 10 g block into the back of the truck at set it on a slope of 30° 4.Turn the key on the toy truck 15 times and let it go 5.Measure and record the distance the toy truck and block traveled 6.Repeat steps 2-5 two more times as Trials 2 and 3 7.Put the 20g block on the back of the truck and this time set it on a slope of 45° 8.Repeat steps 2,4-6 9.Put the 30g block on the back of the truck and this time set it on a slope of 60° 10.Repeat steps 2, Find and record the average distance the toy truck system traveled when started at different slopes. Your answer should include the following terms: controlled experiment, manipulated variable, responding variable, evidence/data, valid, invalid