1. Reminders! Lab fees are $10; pay at the bookstore on the first floor, then bring me the receipt. If you are on fee waiver, please ask for a receipt at the bookstore and bring it to me. THIS GOES ON YOUR GRADE! You will need a 70 page spiral notebook every day! You will be turning them in for a grade! Disclosure statements (signed) are due!

2. Bell Work Week 3 Please write the question AND your answer! Question: You are asked to demonstrate that the volume of a gas expands when heated and contracts when cooled. You do an experiment using a balloon. First, you inflate and tie off a balloon, then measure the circumference at room temperature. Then you put the balloon in a freezer for an hour, measure the circumference, and find that it has contracted. When you put the balloon in a warm room for a time, the balloon expands and the circumference increases. What is the variable in this experiment?

3. Bell Work Week 3 An engineer has created a new engine for race cars. It is necessary to know which fuel mixture will allow the engine to run at its peak performance. Which experimental design is best for this investigation? A) Use one fuel mixture on the engine and measure its performance B) Use one fuel mixture on many types of engines and measure their performance C) Use various fuel mixtures on the engine and measure its performance D) Use various fuel mixtures on many types of engines and measure their performance

4. Objectives Content Objective (what will you learn today?): Students will: – Understand how a microscope works – Know and understand steps of the scientific method Language Objective (HOW will I learn the content objective?): Students will: – Take notes on the scientific method – Design an experiment to hatch brine shrimp

5. Review What are the steps of the scientific method? What is the difference between an independent and dependent variable?