1. Water Vocabulary- Sept. 27 2010  Buoyancy – the upward force on an object that enables it to float or appear to be lighter.  Polarity – the magnetic pull of an object caused by unequal electronic force. Water is a polar substance- it is attracted to itself and other things because of electron magnetism. (Water is a dipole substance!)

2. Water Vocabulary- Sept. 28, 2010  Atom – The atom is a basic unit of matter that consists of a dense, central nucleus surrounded by a cloud of negatively charged electrons. (Almost all of the mass in an atom is made up from the protons and neutrons in the nucleus, with a very small contribution from the orbiting electrons.) orbiting electronsorbiting electrons  Nucleus -The very dense central region of an atom that consists of nucleons (protons and neutrons) nucleonsprotons neutronsnucleonsprotons neutrons

3. Water Vocabulary – Sept 29 2010  Adhesion – When a molecule attracts to a different substance. Water molecules are not only attracted to each other, but to any molecule with + or - charges.  Capillary Action- is a phenomenon where liquid rises in a narrow space such as a thin tube, or in porous materials. (wicking)

4. Water Vocabulary –Sept. 30, 2010  Cohesion-molecules of a substance sticking together. (Water is a dipole cohesive substance)  Surface Tension- is when molecules at the surface of a liquid resists an external force. This property provides the necessary wall tension for the formation of bubbles and water striders to skim across a pond.

5. Water Vocabulary – Oct. 1, 2010  Specific Heat -The quantity (amount) of heat required to raise the temperature of a substance by one degree Celsius. Water has a HIGH specific heat.  Universal Solvent – A substance (water) that has the ability to dissolve many other substances. substances.

6. Water Vocabulary Oct 11, 2010  Hydrosphere  Water Cycle

7. Water Vocabulary Oct. 12 2010  Watershed  Tributaries

8. Water Vocabulary Oct 13, 2010  Wetland  Estuary

9. Water Vocabulary Oct. 14, 2010  Non-point source Pollution  Point- source Pollution

10. Water Vocabulary Oct 15, 2010  Groundwater (aquifer)  Hard water – Water with magnesium and calcium in it.

11. Water Vocabulary Oct. 25, 2010  Turbidity  Nitrates  Phosphates

12. Water Vocabulary Oct 26, 2010  Bio-inhibitors- living things that exist in water and other environments that are used to measure the health of the environment.  pH Scale-The pH scale ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic (0-6) A pH greater than 7 is basic or alkaline (8-14) or alkaline (8-14)

13. Water Vocabulary Oct 27 2010  Runoff  Algae Bloom

14. Past Vocabulary Lists  The slides located after this one are from previous weeks.

15. Science Vocabulary – 9/14/10 Experiment- a test, trial, or tentative procedure; an act or operation for the purpose of discovering something unknown or of testing a principle.  Independent Variable- Definition: in an experiment the independent variable is the one thing that is varied or manipulated by the researcher.

16. Science Vocabulary- 9/15/10  Dependent Variable  Definition: (in an experiment) the event studied and expected to change when the independent variable is changed.  Control /Control group  Definition :a standard of comparison in scientific experimentation. (the control stays constant throughout the experiment)

17. Science Vocabulary 9/16/10  Hypothesis-  Definition: An educated guess to the outcome of an experiment. The hypothesis should to be a realistic solution to the question or problem. The hypothesis should to be a realistic solution to the question or problem.  Experiment Conclusion  Definition: The conclusion should contain summaries of the actual experimental results. In addition, there should be a general statement drawing the data and the concepts together.

18. Science Vocabulary – 9/17/10  Volume  Defn: Volume is the capacity or space within a three-dimensional substance (example: solid, liquid, gas) Volume is quantified numerically using the SI derived unit, the cubic meter. (cm 3 - cubic meter)  Density  Defn: Density is a number given from dividing mass (grams) by volume (mL or cm 3 ) An object with a large mass and small volume has a high density. (Ex gold)