Pure Substances and Mixtures!
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.
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)
What are atoms and particles?
What is the difference between a Hetero and Homogenous solution?
What is the Particle Theory of Matter?
What Terms and Definitions do I need to know for this unit? How can I Practise them?
What’s a good video to summarize all this stuff?
Research, review and practical studies:
The Scientific Method Story #1.pdf
Word studies and Vocabulary Lists:
Science Quiz here
Substances and Mixtures Test.pdf
Assessment Forms
Science Lab Assessment Form_2011.pdf
Text Resources:
What are Pure Substances and Mixtures?
Who is this guy?
Substances exist in various forms.
•Marbled Milk?
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!
Overall:
•demonstrate an understanding of the characteristics of mechanical mixtures (heterogeneous) and solutions (homogeneous) and describe these characteristics using a scientific model (the particle theory)
•• investigate properties of different kinds of mechanical mixtures and solutions that make them useful in manufacturing products for particular purposes
•• identify human uses of mixtures and solutions in everyday life, and evaluate the environmental impact of some of these uses.
Daniel Does The Elements!
Check out these science activities you can do right now!
Particle Game!
Make a Wordle!
Make a Smore!