Thursday, September 12, 2013

Greetings from 8th grade science

Hello Walton family!

We have been busy in the 8th grade physical science classroom this quarter.  Students have been busy refining their measurement skills and learning how to effectively use them in communicating lab data.  We have had many opportunities to conduct lab experiments which offer practice using the metric (SI) system.  Reviewing the metric prefixes and converting between metric units is a necessary skill for comparing data with other scientists throughout the world.

Through laboratory experiments, students have been using scientific tools such as triple beam balances, rulers and graduated cylinders to find mass and volume.  Once the mass and volume are calculated, students are then able to solve for the density of various substances.  In one particular lab, a hypothetical crime had been committed and the suspect had left substances at the scene with various densities.  Students then used their density calculations and data to determine which suspect had most likely committed the crime.  Although learning to measure correctly sounds very basic, it is a skill that is necessary to master which will enable students to compete scientifically in the 21st century.

Another student favorite is the density column. Students are shown 8 different liquids and asked to predict where each liquid will layer within the large 1000ml graduated cylinder. This challenges students to think critically as they combine their prior knowledge along with their new understanding of density in making a prediction. As a teacher I know it is an engaging lesson when students ask for permission to take out their phones and take a picture.

We are now beginning to study various aspects of matter which will lead us into the study of the atom, Periodic Table and bonding.  One student commented to me the other day "Mrs. Kepple, why would anyone not want to stay here all day and learn science?".  I have to agree with him.  I hope the students are learning what I already know- chemistry is fun!


Heather Kepple

8th grade science

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