The attraction of molecules at the surface of a liquid is called surface tension.
The polarity of water molecules can help explain why water has a strong surface tension.
Students will observe several phenomena related to the polarity of water molecules. They will observe a demonstration of a paper clip being placed on the surface of water.
Water has some peculiar properties, but because it is the most common liquid on Earth, we typically do not recognize how truly peculiar water really is. Water is everywhere. It's in the air we breathe. It's in our sink faucets, and it's in every cell of our body. Water is an unusual substance with special properties.
What property(ies) of water allows the paperclip to rest on the surface of the water?
Its surface tension. Water has a high surface tension caused by the strong cohesion between water molecules, and acts sort of like a magnet with holding power
On January 30, 2014 the Junior High 8th Grade Honors Student culminated a five month long project with the 17th Annual Science Fair Awards Ceremony. The students did a fantastic job and on March 28 the top 20 Junior High projects will attend the annual Pittsburgh Regional Science Fair and compete against over 1000 other students.
This years winners were Bethany Hartman & Cassie Lodivico with Best of Show. 1st Runner-up Was Jaida Syrek, 2nd Runner-up was Alex Fetkovich, and 3rd Runner-up was Jason Lambert.
Mr. Ayers and Mr. Olenic were recently awarded an Elementary/Middle School science equipment grant from the Society for Analytical Chemists of Pittsburgh. The grant will be used to purchase 30 compact digital scales to be used in conjunction with the STEM day project at Economy Elementary School in April of 2014.
During the STEM day the 7th & 8th grade honors science students will be teaching the 3rd graders in various STEM projects/lessons. We hope this program will enable the students to learn about chemistry, math, and technology. These scales will be used directly for a density station. We believe that using labs and hands on experiences, especially for the younger students, will enhance their interest in STEM. As soon as we receive the scales we plan on using them in our science classes as well as in the technology education classrooms. Congrats to Mr. Ayers and Mr. Olenic!
Several Ambridge High School Interact Club members along with Junior High Students from Mrs. Colorito's classroom spent the day being Santa's little helpers at Economy Elementary during the PTA's Santa Shop. The students enjoyed assisting the "shoppers" and making sure their gifts were wrapped for under the Christmas tree. Many of the older students reminisced about their own excitement of the Santa Shop when they were in elementary school. They seemed to find the same amount of joy watching the new generation of students pick out the perfect gift for the family members who were on their Christmas list. (An added bonus was getting to pay a visit to Santa!)
The 7th and 8th grade honors science students enjoyed a wonderful day on the river system in Pittsburgh. The students morphed into scientists as they traveled Pittsburgh's famous three river analyzing living and nonliving indicators of water quality. Results are correlated with industrial history, historical and current land use, and serve as a springboard for exploring issues of sustainability and green designs.
Students work together to:
Identify point and non-point pollution sources,
Collect and classify live plankton and macro-invertebrates,
Test water for chemical and physical indicators of pollution,
Correlate form to function in identifying fish and birds,
Explore concepts of sustainability and green design,
Discover how they fit into the river ecosystem - no matter where they live.