1. WATER UNIT

2. WHAT ARE THE TWO KINDS OF OBSERVATIONS? Qualitative Observations describe an object’s characteristics, properties or attributes. Examples would include: color, texture or odor. Quantitative Observations involve a quantity or an amount. Examples would include mass, volume or temperature.

3. HOW IS A CONTROLLED EXPERIMENT DESIGNED? A controlled experiment should have a control, a standard for comparison. Controlled experiments only change one variable at a time. The one variable that changes in a controlled experiment is called an manipulated variable. The thing that is affected by changing the manipulated variable is called the responding variable. All of the things that stay the same in an experiment are called constants.

4. WHICH ANTIOBIOTIC KILLS THE MOST BACTERIA? Students put the same type of bacteria in 15 petri dishes. Antibiotic A was applied to 5 dishes, Antibiotic B was applied to 5 dishes, and antibiotic C was applied to the last 5 dishes. At the end of two weeks, the number of bacteria cultures were counted.

5. 1.What were the constants? 2.What was the manipulated variable? 3.What was the responding variable? 4.Was there a control?

6. WHICH PIZZA HAS THE MOST GREASE? Lucy and Amy buy three slices of cheese pizza: one from Dominoes, one from Pizza Hut and one from Jules. The hold each slice over a paper towel for 60 seconds and let the grease drip down onto a napkin. The observe to see which napkin has the most grease. Then they eat the pizza!

7. 1.What were the constants? 2.What was the manipulated variable? 3.What was the responding variable? 4.Was there a control?

8. HOW DOES THEORY DIFFER FROM A LAW? TheoryLaw

9. WHAT ARE THE BASE UNITS USED IN CHEMISTRY? Length is measured in meters. Mass is measured in kilograms. We will use grams. There are 1000 grams in one kilogram. Temperature is measured in kelvin. We will use C. Time is measured in seconds. We will also talk about something called a mole.

10. WHAT ARE THE METRIC UNITS OF LENGTH? The common metric units for length are the kilometer, the meter and the centimeter. Remember there are 10 millimeters in a centimeter. 100 centimeters in a meter and 1000 in 1000 meters in a kilometer.

11. WHAT ARE THE UNITS FOR MASS? The units of mass are grams, when we record the mass of an object we will use a balance.

12. HOW DO YOU DETERMINE THE MASS OF A QUANTITY OF WATER?

13. WHAT ARE THE UNITS FOR VOLUME? Volume can be recorded as mL or cm 3 1 cm 3 = 1 mL

14. WHAT ARE THE UNITS FOR TEMPERATURE? The units for temperature are Celsius, Kelvin and Fahrenheit. Scientists usually describe temperature using Kelvin or Celsius. Your weather man uses Fahrenheit to report the weather.