Honors 9th grade science Holicong middle school Jodi lock Water Chemistry and pH Honors 9th grade science Holicong middle school Jodi lock

pH Percent of dissolved hydrogen Acid or base Impacts “habitat ability” in water

Acids: More H+ ions Bases: More OH- ions

Tomorrow… Each group must bring 1 drink or liquid to test A small bottle is enough NOT: Vinegar, Saltwater, Freshwater

Begin Ocean Acidification section if time permits Now… pH analysis lab Use VERNIER GRAPHICAL ANALYSIS APP ON DESKTOP Begin Ocean Acidification section if time permits

Warm up… What is pH? As a table, complete the “Guiding Question”, “Group Claim” and “Hypothesis”.

Begin Ocean Acidification section if time permits Now… pH analysis lab Use VERNIER GRAPHICAL ANALYSIS APP ON DESKTOP Begin Ocean Acidification section if time permits

Salinity…a review The amount of dissolved solids in a given amount of liquid is called salinity Measured in ppt (parts per thousand) For example: 1000 grams of ocean water can be evaporated and leave 35 grams of solids behind

Ocean Water Characteristics Water flows from land into the oceans and bring minerals At the same time, water is evaporating and leaving the minerals behind

Effects of Climate & Movement Some parts of the ocean are saltier than others Coastal waters in places with hotter, drier climates typically have higher salinity.

Climate and Movement Affect Salinity Heat increases evaporation rate Evaporation = Salinity

Climate and Movement Affect Salinity Some parts of the ocean move less than other parts Slower moving areas of water develop higher salinity Movement Salinity