Due Today: Bar GraFun & Line GraFun Worksheets Tuesday– August 16th DAILY AGENDA REQUIRED MATERIALS Start of Class Routine Review Bellwork Variables Notes & Activity Variable Practice Worksheet Science Binder Pencil/Eraser Whiteboard Eraser Dry Erase Marker Whiteboard Due Today: Bar GraFun & Line GraFun Worksheets

What is a Variable?

Variables in Science Experiments Variable: any factor, trait, or condition that can exist in differing amounts or types.

Variables in Science Experiments An experiment usually has three kinds of variables: Independent Dependent Controlled

The one factor that is changed by the person doing the experiment Types of Variables Independent Variable The one factor that is changed by the person doing the experiment What is tested by the scientist What is changed by the scientist

The factor which is measured in the experiment Types of Variables Dependent Variable The factor which is measured in the experiment What is observed/measured – the data The effect caused by the independent variable.

All the factors that stay the same in an experiment Types of Variables Control All the factors that stay the same in an experiment Things that could change but don’t Kept the same by scientists These allow for a fair test

Can you identify the variables?

What is the independent variable? 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. What is the independent variable? Same Jigsaw Puzzle Different Ages Time it took to put the puzzle together.

What is the independent variable? 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. What is the independent variable?

What is the dependent variable? 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. What is the dependent variable? Same Jigsaw Puzzle Different Ages Time it took to put the puzzle together.

What is the dependent variable? 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. What is the dependent variable?

What is the controlled variable? 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. What is the controlled variable? Same Jigsaw Puzzle Different Ages Time it took to put the puzzle together.

What is the controlled variable? 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. What is the controlled variable?

I think I can! I think I can!

What is the independent variable? The higher the temperature of water, the faster an egg will boil. What is the independent variable? Temperature of water Time it takes to boil Egg

What is the dependent variable? The higher the temperature of water, the faster an egg will boil. What is the dependent variable? Temperature of water Time it takes to boil Egg

What is the controlled variable? The higher the temperature of water, the faster an egg will boil. What is the controlled variable? Temperature of water Time it takes to boil Egg

Why ONLY change the independent variable? If you measure a change in the dependent variable, you won’t know which variable is causing the change.

You’re doing GREAT!

What is the independent variable?

What is the dependent variable?

What is the controlled variable?

Variables in Graphs

Variable Practice Worksheet Homework: Variable Practice Worksheet