Scientific Method How problems get solved!!!

Hypothesis A prediction that can be tested. A prediction that can be tested. Guess??? Guess???

Variable Factor tested in an experiment Factor tested in an experiment

Control Standard used to compare with the outcome of a test. Standard used to compare with the outcome of a test. We do nothing to a control. We do nothing to a control.

Theory An explanation of things or events based on many observations. An explanation of things or events based on many observations. Not a guess Not a guess Supported by data Supported by data

Law Large amounts of repeating data that never change. Large amounts of repeating data that never change. VERY few laws in science VERY few laws in science

Think About It??? Can you think of a law in science??? Can you think of a law in science??? Hint: Apple Hint: Apple

Gravity………Predictable

What will happen next??? You are swimming in the ocean and from the depths comes a large silhouette. It is a shark swimming right at you. This is the biggest shark you have ever seen. It is almost 45 feet. (Jaws was only 25 feet) You close your eyes and prepare for what is about to happen next. You are swimming in the ocean and from the depths comes a large silhouette. It is a shark swimming right at you. This is the biggest shark you have ever seen. It is almost 45 feet. (Jaws was only 25 feet) You close your eyes and prepare for what is about to happen next. What will happen next? What will happen next?

This

Or This

Scientific Method The method scientists use solve problems The method scientists use solve problems Occurs in 6 steps Occurs in 6 steps

Warm Up Questions??? 1. What is a hypothesis? 2. Why do we have so few laws in science? 3. Why do we need to have a control when conducting an experiment? 4. What is the 4 th step in the scientific method? 5. Can we say a hypothesis is true or false?

Step 1 State the problem State the problem

Step 2 Gather information Gather information

Step 3 Form a hypothesis Form a hypothesis

Step 4 Perform an experiment Perform an experiment

Step 5 Analyze data Analyze data

Step 6 Draw Conclusions Draw Conclusions Fish that swam away survived Fish that swam away survived Fish that stayed put were eaten Fish that stayed put were eaten

2 Possible Outcomes 1. Hypothesis is supported 1. Hypothesis is supported –Repeat experiment 2. Hypothesis is not supported 2. Hypothesis is not supported –Revise hypothesis

Think about it??? Why can’t we say our hypothesis is right or wrong??? Why can’t we say our hypothesis is right or wrong???

State Problem Gather Information Form Hypothesis Perform Experiment Analyze Results Draw Conclusions Hypothesis Supported Hypothesis Not Supported

Problem 1 Billy is a 7 th grade science student. He never does his homework or lab reports. He has just gotten his report card and his first 9 weeks grade is a 52%. Billy is a 7 th grade science student. He never does his homework or lab reports. He has just gotten his report card and his first 9 weeks grade is a 52%.

Problem 2 You take your dog Fido for his daily walk. After you get home you notice that Fido is itching and scratching himself quite often. That night Fido is up all night howling and scratching. His skin is irritated and he has scratched a good bit of his fur off. You take your dog Fido for his daily walk. After you get home you notice that Fido is itching and scratching himself quite often. That night Fido is up all night howling and scratching. His skin is irritated and he has scratched a good bit of his fur off.

Problem 3 It takes Mr. Colonna 25 minutes to get to work. It takes Miss. Sonnie 35 minutes to get to work. They both live in the same neighborhood. Miss Sonnie takes the back roads while Mr. Colonna takes the parkway. Miss Sonnie can not figure out why Mr. Colonna always beats her to work even though they leave at the same time. It takes Mr. Colonna 25 minutes to get to work. It takes Miss. Sonnie 35 minutes to get to work. They both live in the same neighborhood. Miss Sonnie takes the back roads while Mr. Colonna takes the parkway. Miss Sonnie can not figure out why Mr. Colonna always beats her to work even though they leave at the same time. Using the scientific method, come up with a reason and solution for Miss. Sonnie. Using the scientific method, come up with a reason and solution for Miss. Sonnie.

Arrange the following in correct order from smallest to greatest. Organs, Tissues, Cells, and Systems. _________  _______  ________  _________

Problem 4 Miss. Sonnie loves her third period class. In fact she loves them so much that before every test she gives them a review packet to study. She does not give this packet to any other class. Miss Sonnie’s 3 rd period class has an A average while the rest of her classes have a C average. Miss. Sonnie loves her third period class. In fact she loves them so much that before every test she gives them a review packet to study. She does not give this packet to any other class. Miss Sonnie’s 3 rd period class has an A average while the rest of her classes have a C average.

Problem 5 Work with your partner and come up with a problem that you could solve using the scientific method. Work with your partner and come up with a problem that you could solve using the scientific method. Ex. My brother stole my ipod Ex. My brother stole my ipod Ex. My dog ate my homework Ex. My dog ate my homework Ex. My car was stolen Ex. My car was stolen Use your imagination!!!!! Use your imagination!!!!!

Think About It??? Why do we need a control in any experiment??? Why do we need a control in any experiment???