The Physical Properties and Chemical Properties of Matter

Physical and Chemical Properties of Matter. Mr. Causey discusses physical properties and changes as well as chemical properties and changes. Physical changes result in NO NEW substances and chemical changes result in NEW substances (products) because of a chemical reaction. Tearing a piece of paper is a physical change but burning a piece of paper is a chemical change. Continue reading

Creating an Element Superhero or Villain

villans potassium««« written by Ana Pereira Neves.

Curriculum Connection:

This activity is intended for Grade 9 D/P level courses.

Introduction:In this activity, you will create a poster of a Superhero or Villain based on an element in the periodic table with an atomic number of 20 or less.

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Mystery of 2,000-year-old Roman concrete solved by scientists | The Independent

Seawater makes ancient concrete stronger, so it lasts while modern structures crumble into the sea. Researchers have now discovered that elements in the volcanic substance react with sea water, strengthening the material  2,000 years after they were first erected, Ancient Roman harbours made from concrete are still standing across Europe.  Continue reading