Monday, September 12, 2011 Please follow the procedure for entering the classroom. Copy today’s “I can” statement. Fill out your agenda. Remember CHAMPs expectations. Thank you! C: 0 H: quietly ask your elbow partner; after bell, raise your hand to ask Ms. Edgington A: Complete bellringer tasks M: 0 (once you sit down!) P: silently completing tasks

Step 2: Form a Hypothesis Hypothesis: an educated guess or prediction that can be tested; an “if, then” statement If ____independent variable______ then__dependent variable_______ http://msubbingscience.wikispaces.com/LS+1+-+Science+Investigations+and+Experiments

Types of Variables There are 2 main types of variables: Independent Variable: The variable that is changed by the scientist; the ‘I control’ variable Dependent Variable: The variable that might change because of what the scientist changes – what is being measured http://msubbingscience.wikispaces.com/LS+1+-+Science+Investigations+and+Experiments

Complete Packet Today! You may work independently or with one or two partners. You may sit where you wish in the room (except not beyond the sink) Remember expectations (on the board)

Identifying Variables http://msubbingscience.wikispaces.com/LS+1+-+Science+Investigations+and+Experiments

Remember! Your hypothesis can TELL you what your variables are! Ex. If I drink Mountain Dew before bed, then I will not sleep very much. IV: Drinking Mountain Dew DV: the amount of sleep http://msubbingscience.wikispaces.com/LS+1+-+Science+Investigations+and+Experiments

If I brush my cat more, then there will be less fur on my furniture IV: ______________________ DV: ______________________ http://msubbingscience.wikispaces.com/LS+1+-+Science+Investigations+and+Experiments

Now read the following experiment and identify the independent and dependent variables Elizabeth wanted to test if temperature affected how fast milk goes bad and curdles. She left milk in a room temperature closet, a fridge, and a oven that was turned on low heat. She then measured how rotten the milk was after 10 days. IV: ____________________________________ DV: ____________________________________ http://msubbingscience.wikispaces.com/LS+1+-+Science+Investigations+and+Experiments

Hypothesis http://msubbingscience.wikispaces.com/LS+1+-+Science+Investigations+and+Experiments

Example: Independent Variable: I feed my cat a lot of food she will get fat If ___________________________ then _________________________ http://msubbingscience.wikispaces.com/LS+1+-+Science+Investigations+and+Experiments

Try to use INCREASE and DECREASE in your hypothesis! Remember Try to use INCREASE and DECREASE in your hypothesis! Ex. IF I increase the amount of food I give my cat, THEN she will increase her weight http://msubbingscience.wikispaces.com/LS+1+-+Science+Investigations+and+Experiments

Now Try it on Your Own! (2nd page in packet) ‘Writing a Good Hypothesis” Just ‘plug and chug’ in your variables! http://msubbingscience.wikispaces.com/LS+1+-+Science+Investigations+and+Experiments

Constants and Controls http://msubbingscience.wikispaces.com/LS+1+-+Science+Investigations+and+Experiments

Constant Constant: something that scientist makes sure is the same throughout the experiment Ex. Watering the plants the same amount of water or making sure you are testing the same person every time http://msubbingscience.wikispaces.com/LS+1+-+Science+Investigations+and+Experiments

Control Control: The part of the experiment that the scientist doesn’t change or add the variable to Ex. The plant with the white light http://msubbingscience.wikispaces.com/LS+1+-+Science+Investigations+and+Experiments

Conclusion The results of the experiment; is your hypothesis “right or wrong”? http://msubbingscience.wikispaces.com/LS+1+-+Science+Investigations+and+Experiments

Smithers Control: Group B Independent Variable: recipient of special juice Dependent Variable: stacks of papers Conclusion: The special juice does not increase the productivity of workers. Improvements:

Homer Observation: shower is covered in green slime Control: water side Independent Variable: coconut juice side Dependent Variable: appearance of the green slime Conclusion: Coconut juice does not get rid of the green slime.

Bart Control: mice not exposed to radiowaves Independent Variable: Exposure to radiowaves Dependent Variable: Strength Conclusion: Exposure to radiowaves may have an impact on allowing mice to become stronger. Improvements:

Krusty Control: old itching powder Independent Variable: Experimental itching powder Dependent Variable: amount of time itching The data does support the advertisement claims about the products.

Ender Tell me one thing you know FOR SURE that relates to today’s “I can” statement.