Riddles1. What belongs to you but others use it more than you do?

2. I am the beginning of sorrow, and the end of sickness. You cannot express happiness without me, yet I am in the midst of crosses. I am always in risk, yet never in danger. You may find me in the sun, but I am never out of darkness.

3. Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

Scientific Method• O

• H

• T

• A

• C

OBSERVATION

HYPOTHESIS

TEST

ANALYZE DATA

CONCLUSION

“Ordinary People Doing Extraordinary Things”

What are you Goals?The 7 Habits of Highly Effective Teens

• Habit 1: Be Proactive: Principles of Personal Choice positive friends/activities

• Habit 2: Begin with the End in Mind: Principles of Personal Vision Goals

• Habit 3: Put First Things First: Principles of Integrity & Execution • • Habit 4: Think Win/Win: Principles of Mutual Benefit (help / be helped)

• Habit 5: Seek First to Understand, Then to be Understood:

• Habit 6: Principles of Creative Cooperation & Continual Improvement

• Habit 7: Sharpen the Saw: Principles of Balanced Self-Renewal (adapt)

Life is like a box of chocolates……

Riddles

• 1. You answer me, although I never ask you questions. What am I?

• 2. What's the greatest worldwide use of cowhide?

• 3. What goes around the world and stays in a corner?

Scientific MeasurementMeasuring Base Unit Instrument• Volume : Liters : Graduated Cylinder

• Mass: Grams: Triple Beam Balance

• Length: Meters: Ruler

• Distance: Light Year: Parallax

DensityDefinition: How compact something is

Density

Density

What changes Density?

Determining Density

D = M =V =

Practice

• Determine density for the following.

• 1. Mass = 5 grams Volume = 5 ml

• 2. Mass = 10 grams Volume = 5 ml

Which will float?

Density Practice

• Determine the mass of the following• 1. Density = 1 g/ml volume = 3 ml

• 2. Density =.9 g/ml Volume = 2 ml

Which one could be water?What does adding salt to water do?

Practice

• Determine the volume for the following• 1. Mass = 6 grams Density = 2 grams/ml

• 2. Mass = 12 grams Density = 4 grams/ml

Which one is more compact? Is muscle or fat more dense?

Who Likes Doritos?

OHTAC Review• What is the name of the theory of how the dinosaurs became extinct?

___________________________• What is the theory of how the solar system began?

________________________• What is 90o divided by 3? _________ (no calculator)• What step in the scientific method is also called an educated guess?

_______________• What step in the scientific method uses a table to collect data?

_____________• What step in the scientific method uses a graph to present results?

_____________• If you are testing the effects of fertilizer on plant growth, what is your

independent variable? ___________________• What is your dependent variable? (what are you testing?) _______________