Science 7: 10/1/13 Ellen Show: Hawaii Chair ChromeBooks: Review Games Class Jeopardy Homework: As Seen on TV lab due Thursday! *Study Unit Review for Test Tomorrow!*

ChromeBooks: Remember Username is Inky the Squid: goo.gl/W9z0d4 Walk the Plank: goo.gl/1Kz1dU

Scientific Method!

DefinitionsObs. / Inf. Control Exp. Random

Row 1, Col 1 What is a problem? Something that needs to be solved. Written in a TESTABLE QUESTION format!

1,2 What is an observation? Information gathered with five senses

1,3 Write a possible hypothesis to answer the following problem question: What effect does sunlight have on plant growth?

1,4 What is the scientific method? Steps used by scientists to carry out an experiment

2,1 What is a hypothesis? An educated guess, written: IF (you do this) THEN (this will happen statement)

2,2 What is an inference? Statement to explain observation

2,3 Kylie designed an experiment to see if crest white strips really whiten teeth. Set-up: 50 people used crest white strips for a month and 50 people did not use crest white strips for a month. At the end of her study she measured how white their teeth were. What is the independent variable? Crest White Strips vs. No Crest White Strips

2,4 What three things do all good experiments have in common? Only test 1 variable, many trials, many test subjects

3,1 What is the difference between the data section and the conclusion section of the scientific method? Data section organizes data in tables and charts. The conclusion section EXPLAINS the data!

3,2 Daily Double

3,3 Kylie designed an experiment to see if crest white strips really whiten teeth. Set-up: 50 people used crest white strips for a month and 50 people did not use crest white strips for a month. At the end of her study she measured how white their teeth were. What is the dependent variable? Measurement of how white test subjects teeth are

3,4 Why is it important to test only one independent variable at a time? So you know which variable had an effect!

4,1 Control Group: “normal group” Experimental Group: “Guinea Pigs” What is the difference between the control and experimental groups?

5,2 Daily Double

4,3 Kylie designed an experiment to see if crest white strips really whiten teeth. Set-up: 50 people used crest white strips for a month and 50 people did not use crest white strips for a month. At the end of her study she measured how white their teeth were. What is the control and experimental groups? Control: People w/o crest white strips Experimental: People with crest white strips

4,4 What do I mean when I say all good experiments have a large sample size? What do I mean when I say all good experiments have many trials? Large Sample Size = Many Test Subjects Many Trials = Repeat over and over again

5,1 Independent variable: I change ____ vs. ____ Dependent variable: Data Measured Constants: Variables kept the same between control & experimental groups! Define the following: Independent Variable Dependent Variable Constants

4,2

5,3 Kylie designed an experiment to see if crest white strips really whiten teeth. Set-up: 50 people used crest white strips for a month and 50 people did not use crest white strips for a month. At the end of her study she measured how white their teeth were. What are the constants? Same toothpaste, Same overall teeth condition, Same frequency of brushing

5,4 List the 6 steps of the scientific method in order and explain each step. Problem, Research, Hypothesis, Experiment, Results, Conclusion