Today we will begin our class with a lesson in science vocabulary. I will give half the vocabulary words for the class to study in groups, and write down definitions for in preparation for the quiz. We will then complete it as a fill in the blanks style quiz, and go over the answers as a class.
Next we will go over some examples from page 89 and 90 on formula writing. It is my hope that by doing this work as a class, we will be prepared to re-take the quiz.
After we turn in Monday's homework (posting the answers and reading them as a class), we will call on those students who owe work to come up and show that they have compeleted all missing and incomplete work, or write make up quizzes.
Reminder - there will be a unit test on Wednesday. It will be timed, but it will be open book. Correct your past quizes and homework assignments from this site, and this will help you study the right information for the quiz. This time you will be allowed to use your text book and notes. Next open book quiz or test I give (and I will not tell you when that will be) will be NOTES ONLY.
Today's assigned work due Wednesday:Pg 257 # 1 - 16
Pg 266 # 1 - 12
and the vocabulary quiz
Yesterday's Assignment Answers are:
Pg 251 # 1 - 6
1. (a) Proton—positive; electron—negative; neutron—neutral
(b) The protons and neutrons are in the centre
of the atom (nucleus). The electrons orbit
the nucleus.
2. If the number of positive charges (protons)
equals the number of negative charges (electrons),
then the atom is neutral.
3. All solid materials are charged by the transfer
of electrons.
4. If an atom has more protons than electrons, it
has a positive charge.
5. When a neutral atom gains electrons, it then
has a negative charge.
6. When two objects are rubbed together, electrons
from one object can be transferred to the
other object.
Pg 254 # 1 - 6
1. In an insulator, the electrons stay in one location.
In a conductor, the electrons are able to
move freely throughout the conductor.
2. As long as the number of electrons equals the
number of protons, the object will be neutral.
3. The Van de Graaff generator is designed to
generate large amounts of static charge.
4. Students’ answers will vary. Four possible uses
of static electricity may include: sandwich
wrap, decreasing air pollution, air ionizers,
painting automobiles.
5. Grounding is allowing charge to flow into
Earth’s surface.
6. The static charge on the truck or airplane
needs to be removed so that a spark does not
ignite the fuel.
We did a quiz on Chapter 3 with a focus on chemical bonding, molecules, and chemical reactions. Here are the answers:
Chapter 3 Quiz
1. D
2. A
3. B
4. D
5. D
6. C
7. A
8. C
9. D
10. D
11. B
12. H
13. F
14. A
15. E
16. D
