Go over Density worksheet answers. Then start Forces

First let's review the  Density Worksheet that was handed out last day and go over the answers.  You will be evaluated on this next day.

Next, Read your text pages 276 to 289 and make a list of key terms in the topic of Forces

Go over the following topics on Force

Answer these questions
1.  What is a Force? How is contact force different from At-a distance Force?
2.   What are the three types of Contact Forces?
3. What is the difference between mass and gravity?
4. What is Weight?
5.   We measure force with the unit NEWTON.  estimate the weight of one newton
6.  What is the difference between balanced forces and unbalanced forces?

October 18 and 20 Workperiod

ASSIGNMENT 1
1.  Write a summary of our Calcium and Water experiment.  Include the following
A. Title
B. Introduction
C. Materials used
D.  Step by step procedure
E. Observations
D. Conclusion: what did you learn?

ASSIGNMENT 2
Please read chapter 7 in your textbook.  Do questions on page 259.  Answer in complete sentences
Make notes on 7.2 and do the questions on page 271.  Answer in complete sentences.

Show the teacher your work and the teacher will make a list of students who have completed the tasks.

Calcium and Water Lab

Calcium and Water lab

Introduction:

Calcium is an alkali earth metal.  When Calcium bumps into water, it

Will cause water to fall apart.  Calcium will then join with one of the atoms of water.

Question:

What new compounds get formed?

Possibilities:  These are the combinations that we can get

1.      Calcium oxide        CaO white

2.     Calcium hydroxide    CaOH white.

3.     H2    Explosive gas

4.     O2    flammable gas

Summarize the demo

Put Calcium metal into a beaker of coldish water. 

Colour change – milky white colour

Temperature change – cold to hot.     WE CALL THIS AN EXOTHERMIC REACTION.

Bubbles came out – meaning a gas was formed

This might be hydrogen gas OR Oxygen gas.

Exercise

1. Make a lego model
2.  Write the correct formula
3.  Write the correct name

Compounds are made from

Na+1 and Cl-1

Al+3 and O-2

Al+3 and Br-3

H+1 and O-2

Al+3 and Cl-1

Na+1 and O-2

H+1and Br-1


Now create five more

Chem notes

The universe is made of MATTER and ENERGY.  Everything can be classified under matter or energy.

MATTER is a a SUBSTANCE with

MASS (has grams) and VOLUME (volumes take up space)

ENERGY can make matter move.  Forms of energy include

KINETIC ENERGY - MOVEMENT

LIGHT  ENERGY – photons moving

SOUND E…   -  vibrations. Matter moving in a wave.

ELECTRICAL ENERGY – Flow of electrons

MAGNETIC

IN QUANTITATIVE science, we define things that are measurable.  Some things are not measurable

QUALITATIVE science (behavioural science) is difficult to measure but must be described and characterized in non measurable terms.

MATTER

Is made of  subunits called ATOMS.

An atom is the basic unit of all matter in our universe.  Everything is made of ATOMS.  THERE IS NOTHING THAT IS NOT MADE OF ATOMS.

ANALOGY – USING A STORY TO HELP UNDERSTAND A CONCEPT

AN ANALOGY OF ATOMS AND MATTER

ATOMS are like lego

-Lego comes in many different shapes and sizes.  So do atoms.

- you can use lego to build things and break them apart and re-use the lego to build different things. 

If I have three tubs of lego and we have three different types of lego, and each tub has the same type…

ELEMENT – A GROUPING (or a box) of the same type of atom

COMPOUND– when you attach two or more different types of atoms together

MOLECULE – two or more of the same type of atom attached together.

How IONIC COMPOUNDS form

Atoms of an element can have a tendency to form one of two charges. 

Some atoms can form a positive charge   + they are called

CATIONS

Some atoms can form a negative charge  -

ANIONS

Opposite charges always attract thus CATIONS ALWAYS JOIN ANIONS

Use lego pieces and build the following compounds

chem notes

Steps of the Scientific Method

This link includes information on the steps of the scientific method

SCIENTIFIC METHOD

Write a summary of the steps