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# Rn variables

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### Rn variables

1. 1. First Name: ______________Last Name: _______________Science #._________ RN Variables ANSWER QUESTIONS AFTER THE TREE CHARTS AND LABEL THE CHARTS AS ASKED. USE ONLY AS MANY COLLUMNS AS NEEDED. EXAMPLE: Ricky Bobby thinks that adding pancake syrup to his pigs’ food will make them sleep less. He feeds the pigs in pen A pig food mixed with pancake syrup. He feeds the pigs in pen B regular food without pancake syrup. For the next week he times how long the pigs in each pen sleep and compares his results. Pen B pigs sleep 5 hours, whereas, Pen A pigs sleep 10 hours. Hypothesis: Ricky Bobby thinks that syrup will make them sleep less. Problem: Will syrup make pigs sleep less? Hypothesis: If I give pigs syrup, then __________________________ Ex. 1: Pen A Exp. 2 : Pen B IND V. Add syrup No Syrup CONSTANT Pig food Pig food CONSTANT 1 week 1 week DEP. V Sleep 10 hrs Sleep 5 hrs LABEL THE: Independent Variable—The one variable the scientist chose to change. Constant—The other variables that stayed the same Dependent Variable—The variable the scientist wants to measure/ observe Circle the Control Group—the “normal” group that we compare things back to. What is the conclusion? Ricky Bobby’s hypothesis is wrong, adding syrup to pig food actually made his pigs sleep more! Other farmers can use this information to make sure they don’t feed their pigs syrup unless they want them to sleep a lot! 1. Mrs. Henley’s friend told her that adding toothpaste to her face wash will make her have less pimples. She believes her friend’s story so Mrs. Henley adds toothpaste to the face wash she puts on the left side of her face. She puts her regular face wash on the right side of her face. She counts the number of pimples on each side of her face and compares. Mrs. Henley had 2 pimples on each side to begin with. After the experiment she counts 4 pimples on the left side of her face, and 15 on the right side. What’s Mrs. Henley’s Problem? __________________________________________________ What is the hypothesis? ______________________________________________________ EXPERIMENT 1 EXPERIMENT 2 EXPERIMENT 3 Label: IV next to the Independent Variable C next to all the Constants DV next to the Dependent Variable Circle the control group. What should Mrs. Henley’s conclusion be? (Hypothesis correct? How do you know? Who can use the info? ) _______________________________________________________________________________________________________ _______________________________________________________________________________________________________
2. 2. 2. Farmer Brown thinks that hanging a poster of a rooster (Foghorn Legern) in his chicken coops will make the chickens lay more eggs. He hangs the poster in coop A and leaves coop B the same. He counts the number of eggs from each coop for a week and compares his results. There were no eggs to start with. Coop B has 191 eggs and Coop A has 188 eggs. What’s Farmer Brown’s Problem? __________________________________________________ What is the hypothesis? ______________________________________________________ EXPERIMENT 1 EXPERIMENT 2 EXPERIMENT 3 Label: IV next to the Independent Variable C next to all the Constants DV next to the Dependent Variable Circle the control group. What should Farmer Brown’s conclusion be? (Hypothesis correct? How do you know? Who can use the info? ) _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ 2. Principal Dugger has to keep taping his fenders back on his truck. He usually uses masking tape. His brother Lugger Dugger tells him that duct tape will work better. He thinks his brother may be right. Principal Dugger tapes the fender on with his usual masking tape and one fender on with the duct tape and compares how long each fender stays on. The masking tape fender stays on for 12 hours and the duct tape fender stays on for 48 hours. Vocabulary: masking tape—usually a yellow/ white color about 1 inch think. Duct tape—usually silver in color about 2-3 inches thick. It is also made in several colors and patterns now. Fender—front part of a car—the “bumper” What is Principal Dugger’s problem/question? _______________________________________________ What is the hypothesis? ______________________________________________________ EXPERIMENT 1 EXPERIMENT 2 EXPERIMENT 3 Label: IV next to the Independent Variable C next to all the Constants DV next to the Dependent Variable Circle the control group. What should Principal Dugger’s conclusion be? (Hypothesis correct? How do you know? Who can use the info? ) _______________________________________________________________________________________________________ _________________________________________________________________________________________________________
3. 3. 3. Principal Moore thinks that a special juice will increase the productivity of her teachers. She creates two groups of 20 teachers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A teachers are given the special juice to drink while they work. Group B teachers are not given the special juice. After an hour, Principal Moore counts how many stacks of papers each group has made. Group A made 587 stacks, Group B made 313 stacks. What is Principal Moore’s Problem/Question? ______________________________________________ What is the hypothesis? ______________________________________________________ EXPERIMENT 1 EXPERIMENT 2 EXPERIMENT 3 Label: IV next to the Independent Variable C next to all the Constant/s DV next to the Dependent Variable Circle the control group. What should Principal Moore’s conclusion be? (Hypothesis correct? How do you know? Who can use the info? ) _______________________________________________________________________________________________________ _________________________________________________________________________________________________________ 4. Mrs. Eutsler thinks that students will perform better on math tests if they eat breakfast. To test her theory, she compares test scores of her 42 students that eat breakfast and 42 students that don’t eat breakfast. She tests all her students at the same time of day. Her students that ate breakfast scored an average of 91% /A and her students that didn’t eat breakfast scored an average of 70%/ C. What is Mrs. Eutsler’s Problem? _________________________________________________ What is the hypothesis? ______________________________________________________ EXPERIMENT 1 EXPERIMENT 2 EXPERIMENT 3 Label: IV next to the Independent Variable C next to all the Constants DV next to the Dependent Variable Circle the control group. What should Mrs. Eutsler’s conclusion be? (Hypothesis correct? How do you know? Who can use the info? ) _______________________________________________________________________________________________________ _________________________________________________________________________________________________________
4. 4. 5. Ms. Fitzsimmons thinks that students that eat sugar are louder than students who don’t eat sugar. She has 60 of her students eat a lot of sugar for a week, and 60 of her students are instructed to not eat any sugar for a week. She buys a sound monitor that measures the loudness of her students on a scale of 1(quiet)-10 (loud). The sound monitor puts the students with no sugar at a 2.0 loudness, and her students that do eat sugar at a level of 8.5 loudness. What is Ms. Fitzsimmons’s Problem? _________________________________________________ What is the hypothesis? ______________________________________________________ EXPERIMENT 1 EXPERIMENT 2 EXPERIMENT 3 Label : IV next to the Independent Variable C next to all the Constants DV next to the Dependent Variable Circle the control group. What should Ms. Fitzsimmon’s conclusion be? (Hypothesis correct? How do you know? Who can use the info? ) _______________________________________________________________________________________________________ _________________________________________________________________________________________________________ 6. Mrs. Bankston thinks that basketball players who exercise by doing jumping jacks before a practice make more free throws than players who do not do jumping jacks. She made 3 of the basketball players do jumping jacks before their free throws, and made sure that 3 other basketball players did not do jumping jacks before their free throws. The players who did jumping jacks scored 20 points and the players who did not do jumping jacks scored 20 points. What is Mrs. Bankston’s Problem? _________________________________________________ What is the hypothesis? ______________________________________________________ EXPERIMENT 1 EXPERIMENT 2 EXPERIMENT 3 Label : IV next to the Independent Variable C next to all the Constants DV next to the Dependent Variable Circle the control group. What should Mrs. Bankston’s conclusion be? (Hypothesis correct? How do you know? Who can use the info? ) _______________________________________________________________________________________________________ _________________________________________________________________________________________________________