Pure Substances and Mixtures!

Physical and chemical properties are discussed here. Find out about the atoms and particles that make up chemical matter, and the experiments that help you anaylze elements.

Pure substances need only to apply.
 
 

A pure substance is a substance that cannot be separated by physical means. eg. filtration, evaporation, distillation or chromatography.

Examples of pure substances include water, gold, glucose, carbon dioxide, oxygen and hydrogen.

A pure substance is made up of one type of particle. The particle that makes up water is H2O. The particle that makes up carbon dioxide is CO2.

Each pure substance has its own set of unique set chemical and physical properties which helps identifies it. 

Water has a melting point of 0°C and a boling point of 100°C. It is also colorless and odorless. Gold however, is yellow in color, solid at room temperature and pressure and is is good conductor of electricity.

Pure substances can be divided into two groups, elements and compounds.

Elements are made up the same types of atoms. The known elements are listed in the Periodic table. Examples of elements include hydrogen, helium, nitrogen, oxygen, iron and gold.

Compounds are composed of one or more different types of atoms that joined togther by chemical bonds. Examples of compounds include water, glucose, methanol, DNA and carbon dioxide.

(From Chemistry For Kids, 2012)

Questions:

Class Tasks:

Research, review and practical studies:

The Scientific Method Story #1.pdf

  1. Solutions & Mixtures #1a.doc

  2. solutions.pdf

  3. Solutions & Mixtures #1.doc

  4. What's the Big Idea #1-  Matter.pdf


Word studies and Vocabulary Lists:

  1. Property of Fluids.pdf

  2. Pure Substances Wordsearch #1a.pdf

  3. The Elements Song.doc

  4. SubstancesWordSearch_Title Page.pdf

  5. Science Master Glossary.pdf


Science Quiz here

Substances and Mixtures Test.pdf


Assessment Forms

Science Lab Assessment Form_2011.pdf


Text Resources:

substances.zip

 

What are Pure Substances and Mixtures?

Who is  this guy?

Substances exist in various forms.

Science Experiments:
Key Concepts:


Protons, electrons and molecules!



The Virtual Lab for Grade 7 Science is here!



A great resource site for students and teachers!



Take the Pure Substances Quiz now and test your mighty skills!



Curriculum Links:

  1. demonstrate an understanding of the characteristics of mechanical mixtures (heterogeneous) and solutions (homogeneous) and describe these characteristics using a scientific model (the particle theory)

  2. • investigate properties of different kinds of mechanical mixtures and solutions that make them useful in manufacturing products for particular purposes

  3. • identify human uses of mixtures and solutions in everyday life, and evaluate the environmental impact of some of these uses.

  4. Chemistry for Kids!

 

Daniel Does The Elements!

Media:
Stuff to do:

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Particle Game!

Make a Wordle!

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