Welcome to Biology Silently and quickly find your

Welcome to Biology! • Silently and quickly find your seat. • Get out the materials for the day and place them on your desk. Your homework binder should go under your chair. • Put your bag on the back of your chair. • Begin working on your Do Now.

Independent Variable • The scientist chooses to change this variable and measure the effect on the dependent variable. • Only 1!

Dependent Variable • Scientist collects data on how this variable changes in response to the independent variable. • Quantitative or Qualitative

Constants • Conditions that are the same for all trials. • Be specific!

Confounding Variable • Conditions that the researcher failed to control, damaging the validity of the experiment. • Sources of error!

Example 1 A student wants to see how the height of the ramp affects the acceleration of the ball.

Example 1 IV? DV? Constants? Confounding variable?

Example s A student wants to see which type of antacid dissolves fastest in water.

Example s IV? DV? Constants?

Experimental Design Lab

Habits of Discussion • Always track the speaker. • Respond to your peers’ ideas. – I agree with ---, because ---. – I disagree with ---, because ---. – I want to build on what --- said.

Collecting Papers • Partner A hands their paper to Partner B. • Starting in the front row, Partner B hands their papers to the person behind them. • When all papers are at the back row, papers are passed towards the door. • The person with whole stack will clip the papers and place them in the bin by the door.

Exiting Class • Put your classwork in the appropriate section of your class binder. • Close your class binder and stack it with your partner’s binder in the middle of your desks. • Complete the Exit Ticket. • When instructed to do so, pass in the Exit Ticket.

Exiting Class • Pack your backpack and put it on your back. Don’t forget your homework binder! • When everyone is ready, I will dismiss the class.