Apr. 30 and May 1 – Mixing Colors

Today we looked at additive and subtractive colours.  They're two different ways to mix colours, using light and using pigment.

It is tricky to have two different ways to mix colours, so try your best to keep them separate in your head.

Handouts

• Abosorbing, Reflecting and Transmitting Worksheet
• Mixing Colours Notes
• Mixing Colours Worksheet

We also watched Bill Nye explain colour and light!

Apr. 29 – Reflection, Transmission and Absorption of Light

Today we looked at what happens when light hits and object.  Does it bounce back (reflection)?  Go through (transmission)?  Or gets absorbed (absorption)?

Handouts

• Light worksheet
• Reflection, Transmission and Absorption

Light can be REFLECTED.

Light can also be ABSORBED.

Light can also pass through things (TRANSMISSION).

Here are some transparent fishes!

Apr. 28 – Light as Electromagnetic Rays

Here are the notes for today:

• Light as Electromagnetic Rays

And the powerpoint to go along with it:

• Light as Electromagnetic Rays PowerPoint

Apr. 25 – New Unit: Optics!

Today we started our new unit!

We discussed where light comes from, what makes light and different methods of producing light.  Here are the notes:

Handout

• Introduction to Optics

Apr. 23 – Practice Test

Today we studied for the Unit Test by working on a practice test.  If you can do the practice test, you will do well on the Unit Test tomorrow.  Good luck!

• Chemistry Practice Test

Apr. 22 – Chemistry Review

Today we did some chemistry review.  Your Unit Test has been moved to this Thursday.

Handout

• Writing and balancing chemical equations review

Here are some solutions we worked out in class.

Apr. 14 – pH Lab Activity

Today we conducted the pH Lab!  We used pH paper and cabbage juice to measure the pH of various household products.  We also investigated two mystery chemicals, one of which was hydrochloric acid (HCl)!  Were you able to tell which one it was?

• pH Lab

Work on the questions in the application part of the lab and hand it in tomorrow.

Apr. 11 – pH Scale

Today I finally got the Smart Board working!  Here are the exciting notes we took as a class:

Handout

• PH Scale

Here are some examples of Acid-Base indicators:

We will be using some of these indicators on Monday!  Bring substances from home that you would like to test.

Apr. 10 – Acids and Bases

Today we began talking about Acids and Bases.

What's an acid?  What is a base?  Have a look at the notes here:

• Acids and Bases

Here are some common household items that are either acids or bases.

They have some similar and some very different properties.  We completed a Venn diagram of the similarities and differences of acids and bases.

What this video of what some powerful acids and bases can do to coke cans:

We then guessed if some substances were acids or bases:

Acid or Base?

 - tomato juice (acid)

 - cough syrup (base)

 - oven cleaner (base)

 - water (neutral)

 - blood (mostly neutral)

 - seawater (base)

 - coffee (acid)

 - saliva (neutral)

 - hair bleach (base)

 - vinegar (acid)

 - baking soda (base)

Apr. 9 – Conservation of Mass Lab

Today we completed some questions and analysis on the Conservation of Mass Lab that we completed yesterday.

Here is the handout in case you don't have it:

• Conservation of Mass Lab

This version is updated with the applications questions on the last page.  If you are not done, you should complete it and hand it in Tomorrow.

Unit Test

We are almost done the chemistry unit and that means a unit test is coming up.

• The test will be on Wednesday, Apr. 23.

Start reviewing early!

Apr. 7 – Lab Prep

Today we discussed the lab activity that we will do tomorrow.

Handouts

• Laboratory Safety Rules
• Conservation of Mass Lab

Remember all our discussion about safety precautions.  I will expect you to treat safety as the first priority when we are conducting the lab.

We then went through the lab procedures together to ensure that you understand the topic we are investigating.  During a chemical reaction we expect mass to be conserved throughout.  This means the total mass of the products is the same as the reactants.  We will investigate if this is true when we perform a reaction in a closed container and in an open container.

We took some time to write down our hypothesis.

Then we looked at the procedures to make sure that you are familiar with all the equipment we will be using.

Here's the setup for part A of the lab.

Finally, we discussed how to describe the appearance of chemical solutions.  Try describing milk and water using the proper terminology.  Which one is transparent or opaque?  Which one is colourless or white?  Which one is more viscous?   Which one is liquid?

We practiced by describing milk and water.

Be prepared to conduct the lab tomorrow!

Apr. 4 – More on Balancing Equations

Today we continued with yesterdays work:

• Balancing Chemical Equations

This is a very difficult procedure, so don't be discouraged if you don't get it right away.  Take your time and go through it using the steps I showed you in class.

Apr. 3 – Balancing Equations

Today we talked about the Conservation of Mass.

Have a look at this video:

The cat turns into their teacher!  This is magical because of many reasons, but one thing is that the woman is much bigger than the class.  She has much more mass.  In real life, mass does not change in a chemical reaction.  The mass of the reactants are the same as the mass of the products.

We talked about what this means when it comes to chemical equations: the number of atoms in the reactants is equal to the number of atoms in the products.

This means we have to adjust chemical equations to make them balanced.  I showed some examples and a method of how to balance them.

Handout

• Balancing Chemical Equations

Apr. 2 – Counting Atoms

Today we reviewed how to count atoms, this time with brackets and coefficients.

Handouts

• Counting Atoms in Chemical Formulas
• Counting Atoms Practice

I also handed back the quiz and went over the solutions.  Please see me if you have any questions.

Apr. 1 – More on Writing Chemical Formulas

We all need more practice on writing chemical formulas.  So today we did a review and covered all the steps and rules.

Handout

• Writing Chemical Formulas

Continue working on the handout from previous day.

• Writing Chemical Equations worksheet