logging in or signing up Identifying Variables Elodie Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 3077 Category: Entertainment License: All Rights Reserved Like it (3) Dislike it (0) Added: January 01, 2008 This Presentation is Public Favorites: 2 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Identifying Variables & Designing Investigations: Identifying Variables & Designing Investigations3 Kinds of Variables: 3 Kinds of Variables Independent Variable – something that is changed by the scientist What is tested What is manipulated3 Kinds of Variables: 3 Kinds of Variables Dependent Variable – something that might be affected by the change in the independent variable What is observed What is measured The data collected during the investigation 3 Kinds of Variables: 3 Kinds of Variables Controlled Variable – a variable that is not changed Also called constants Allow for a “fair test”For Example:: For Example:Students of different ages were given the same jigsaw puzzle to put together. They were timed to see how long it took to finish the puzzle.: Students of different ages were given the same jigsaw puzzle to put together. They were timed to see how long it took to finish the puzzle.Identify the variables in this investigation.: Identify the variables in this investigation.What was the independent variable?: What was the independent variable? Ages of the students Different ages were tested by the scientist What was the dependent variable?: What was the dependent variable? The time it to put the puzzle together The time was observed and measured by the scientist What was a controlled variable?: What was a controlled variable? Same puzzle All of the participants were tested with the same puzzle. It would not have been a fair test if some had an easy 30 piece puzzle and some had a harder 500 piece puzzle. Another example:: Another example:An investigation was done with an electromagnetic system made from a battery and wire wrapped around a nail. Different sizes of nails were used. The number of paper clips the electromagnet could pick up was measured.: An investigation was done with an electromagnetic system made from a battery and wire wrapped around a nail. Different sizes of nails were used. The number of paper clips the electromagnet could pick up was measured.What are the variables in this investigation?: What are the variables in this investigation?Independent variable:: Independent variable: Sizes of nails These were changed by the scientist Dependent variable:: Dependent variable: Number of paper clips picked up The number of paper clips observed and counted (measured) Controlled variables:: Controlled variables: Battery, wire, type of nail None of these items were changedOne more:: One more:The higher the temperature of water, the faster an egg will boil.: The higher the temperature of water, the faster an egg will boil.Slide19: Independent variable – temperature of water Dependent variable – time to cook an egg Controlled variable – type of eggLast one:: Last one:The temperature of water was measured at different depths of a pond.: The temperature of water was measured at different depths of a pond.Slide22: Independent variable – depth of the water Dependent variable – temperature Controlled variable – thermometerDesigning Investigations: Designing InvestigationsThe greater the amount of soap in a soap and water mixture, the bigger a soap bubble can be blown.: The greater the amount of soap in a soap and water mixture, the bigger a soap bubble can be blown. Design an investigation to test this hypothesis. Identify the variables What exactly will be changed? How will it be changed? What exactly will be measured? How will it be measured? The farther a ball drops, the higher it will bounce.: The farther a ball drops, the higher it will bounce. Design an investigation to test this hypothesis. Identify the variables What exactly will be changed? How will it be changed? What exactly will be measured? How will it be measured? You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Identifying Variables Elodie Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 3077 Category: Entertainment License: All Rights Reserved Like it (3) Dislike it (0) Added: January 01, 2008 This Presentation is Public Favorites: 2 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Identifying Variables & Designing Investigations: Identifying Variables & Designing Investigations3 Kinds of Variables: 3 Kinds of Variables Independent Variable – something that is changed by the scientist What is tested What is manipulated3 Kinds of Variables: 3 Kinds of Variables Dependent Variable – something that might be affected by the change in the independent variable What is observed What is measured The data collected during the investigation 3 Kinds of Variables: 3 Kinds of Variables Controlled Variable – a variable that is not changed Also called constants Allow for a “fair test”For Example:: For Example:Students of different ages were given the same jigsaw puzzle to put together. They were timed to see how long it took to finish the puzzle.: Students of different ages were given the same jigsaw puzzle to put together. They were timed to see how long it took to finish the puzzle.Identify the variables in this investigation.: Identify the variables in this investigation.What was the independent variable?: What was the independent variable? Ages of the students Different ages were tested by the scientist What was the dependent variable?: What was the dependent variable? The time it to put the puzzle together The time was observed and measured by the scientist What was a controlled variable?: What was a controlled variable? Same puzzle All of the participants were tested with the same puzzle. It would not have been a fair test if some had an easy 30 piece puzzle and some had a harder 500 piece puzzle. Another example:: Another example:An investigation was done with an electromagnetic system made from a battery and wire wrapped around a nail. Different sizes of nails were used. The number of paper clips the electromagnet could pick up was measured.: An investigation was done with an electromagnetic system made from a battery and wire wrapped around a nail. Different sizes of nails were used. The number of paper clips the electromagnet could pick up was measured.What are the variables in this investigation?: What are the variables in this investigation?Independent variable:: Independent variable: Sizes of nails These were changed by the scientist Dependent variable:: Dependent variable: Number of paper clips picked up The number of paper clips observed and counted (measured) Controlled variables:: Controlled variables: Battery, wire, type of nail None of these items were changedOne more:: One more:The higher the temperature of water, the faster an egg will boil.: The higher the temperature of water, the faster an egg will boil.Slide19: Independent variable – temperature of water Dependent variable – time to cook an egg Controlled variable – type of eggLast one:: Last one:The temperature of water was measured at different depths of a pond.: The temperature of water was measured at different depths of a pond.Slide22: Independent variable – depth of the water Dependent variable – temperature Controlled variable – thermometerDesigning Investigations: Designing InvestigationsThe greater the amount of soap in a soap and water mixture, the bigger a soap bubble can be blown.: The greater the amount of soap in a soap and water mixture, the bigger a soap bubble can be blown. Design an investigation to test this hypothesis. Identify the variables What exactly will be changed? How will it be changed? What exactly will be measured? How will it be measured? The farther a ball drops, the higher it will bounce.: The farther a ball drops, the higher it will bounce. Design an investigation to test this hypothesis. Identify the variables What exactly will be changed? How will it be changed? What exactly will be measured? How will it be measured?