Happy Holidays!

I wish you all a safe and happy winter break! See you January 7th!

Mr. Meles

Grade 7 Eureka video: Measuring Temperature

Here is the Eureka video we viewed in class today.

Grade 7: What to study for the test

Since you all have a free day tomorrow, I hope you will be studying for your Science test! ;)

Key terms to know

heat
temperature
mechanical mixture
solution
pure substance
homogeneous
heterogeneous
changes of state
freezing (solidification)
melting
evaporation
condensation
sublimation (solid to gas)
deposition (gas to solid)

Concepts to know

• The behaviour of  particles in solids, liquids, and gases (e.g, particle attraction, spaces between particles, movement of particles, volume)

• Which changes of states require heat, which require cooling

• The difference between temperature and heat

The test is very easy if you study! Good luck!

Grade 7 Three States of Matter

These animations help you see the behaviour of particles in solids, liquids, and gases.

http://web.visionlearning.com/custom/chemistry/animations/CHE1.1-an-threestates.shtml

Click on the pictures of each state of matter to view the animations.

Grade 7 Molecules in Liquids Video

Here is the second video we watched in class on the behaviour of molecules in liquids.

Grade 7 Molecules in Solids Video

Here is the first Eureka video we watched in class on the behaviour of molecules in solids. This post works best when viewed in Google Chrome.

Grade 7 Review: Heat vs. Temperature

This link will help you understand the difference between heat and temperature.

http://resources.yesican-science.ca/lpdd/g07/lp/nelson/nel07.html

Grade 7 Online Crosswords

Complete the crosswords online to check you answers.

7.1 Crossword: Classifying Matter by Composition

http://www.sciencesource.ca/puzzles/puzzle_07_1/


7.2 Crossword: The Particle Theory of Matter

http://www.sciencesource.ca/puzzles/puzzle_07_2/

Grade 7 Chapter 7 Quizzes

Try these online quizzes to help you study for the test.

7.1 Quiz

http://www.sciencesource.ca/quizzes/quiz_07_1BOmTe.htm

7.2 Quiz

http://www.sciencesource.ca/quizzes/quiz_07_2b3Xn9.htm

Grade 7 Section 7.1 Notes

Classification of Matter by Composition

Matter – anything that has mass and takes up space

Mass – the amount of matter in the object (grams, Kg)

Volume - the amount of space that matter occupies (m³, mL)

Solid - matter that has a definite shape and volume.

Particles are vibrating in place, but they cannot move freely.

Liquid – matter that does not have a definite shape but does have a definite volume; a liquid takes the shape of its container.

Particles can move freely past each other, however, they remain in a fixed volume.

A gas is matter that does not have a definite shape or volume.

Gas particles can move freely and fill the spaces they are in.

Pure substance – a substance made up of only one type of matter; e.g., sugar, distilled water, copper wire are all pure substances. Pure substances appear uniform or homogeneous; this means that every part of the substance has the same composition as every other part.

Mixture – a substance made up of two or more different substances; e.g., pizza, soft drinks, eggs. Each substance inside the mixture keeps its own properties; e.g., you can’t see the sugar in soft drinks, but you can taste it.

Classifying Mixtures – mixtures can be grouped into 2 major categories; mechanical mixtures and solutions.

Mechanical mixtures – the different parts of the mixture can be seen; the mixture does not have the same properties throughout.

Sometimes, it’s easy to see the different types of matter throughout the mixture; e.g., snack mix; sometimes you need a microscope.

These mixtures are said to be heterogeneous, this means that it is made up of different substances with different appearances and properties.

Solutions – these mixtures have the same appearance throughout, but they are made up of two or more substances. Solutions are made when you dissolve one substance into another.

 

All solutions are said to be homogeneous mixtures because they look the same throughout even though they are made up of different substances; e.g., dissolving sugar in tea.

                 

Grade 8 Math Test December 19th and Math Task December 20th

8B Rox!

Grade 6 Atom Test Tueday December 11th

Review:

The structure of the atom
The charges and relative sizes of protons, neutrons and electrons

Have a great long weekend!

Grade 7 Chapter 7 Science Test Thursday December 20th

Class 7A has their test on Wednesday December 19th.