Monday Homework (9/28) for Morning Classes:

For homework you should be studying and practicing your metric conversions because you have a quiz on it tomorrow.

Also, make sure you bring your textbook and notebook for a grade.

Remember, a prepared student is a successfull student!

This week 9/28 - 10/2

This week, afternoon and morning classes will start Dimensional Analysis. This is a really big term for metric conversions or changing from one unit to the other.

We will only spend a couple of days on this and then we will move on to "Classification of Matter," Chapter 15 in your textbook. This chapter is broken down into two sections 1) Composition of Matter and 2) Properties of Matter.

We are now going to start getting into the meat and potatoes of the course material and we are going to start moving along at a greater pace.

Sick

Miss Hamilton is sick today, September 24th. I will see you on Friday... I hope.

Scientific Measurements Test Schedule

Morning Classes:
9/23 - Wednesday

Afternoon Classes:
B Day - 9/24 -Thursday

A Day - 9/25 - Friday

Test will cover:
-mm and cm
-graduated cylinder
-triple-beam balance
-accuracy and precision
-density

"Density Questions" Answers

1. Mass
2. Volume
3. Liquid Volume
4. g/cm3
5. 2 g/cm3
6. water is more dense than oil
7. 38.5 g
8. neither
9. neither
10. ruby
11. neither
12. neither
13. opal
14. amber
15. 14g
16. .57 cm3
17. 1.25 cm3
18. 10g
19. 11g
20. 22.7 cm3
21. .545 g
22. 110.1 cm3
23. 178.86 cm3
24. 219.1 g
25. 5.71 cm3
26. 13,944.95 cm3
27. 80.75 cm3
28. 800.8 g

E.Q. #9

How do you calculate density?

Anybody???

Is anybody reading the blog? Please make a comment to this blog so I know.

Homework Assignments for Sep. 16th:

Morning Classes (1st, 2nd, and 3rd):

***Finish Part 4 of your Density Lab- Due Thursday, Sept. 17th at the beginning of class

Afternoon Class (7-8 B Day):

***Finish Density Problems worksheet through #27 - Due Friday, Sept. 18th at the beginning of class

***You will also have a quiz on the density concepts that we covered in class on Wed.

Notes for Density:

Mass- the amount of matter that makes up an object

Volume - the space that an object takes up

Density= mass/volume

*** In class you have been learning how to apply your measuring skills in order to find density. You broke up into three groups. Part 1) Finding the density of irregularly shaped object (large hex nut, small hex nut, cylinder #1, cylinder #2, cylinder #3) Part 2) Finding the density of a single block and then when the block is doubled. Part 3) Finding the density of water. ***

This is an essential part of physical science so let's make sure that we understand how to determine densities of different objects and substance.

E.Q. #9

How do you calculate density?

Volume

Volume of a Liquid – (ml or L) measure with a graduated cylinder, beaker, or flask
- when reading a graduated cylinder you always need to measure to the bottom of the meniscus as shown below



Volume of a Solid (as seen above, left) – (cm3) equation for volume= l x w x h
- cm3 derived from (cm x cm x cm) Exponents are added together to give 3


- Example (as seen above, right): L = 4 cm, W = 2 cm, H = 3 cm
o Volume = 24 cm3


Volumes of an Irregularly Shaped Object – (cm3) volume of solids need to be expressed in units of distance such as cm, m, km, etc.

-Use this method when you are unable to measure an object with the above method.
- Example of this would be if you want to find the volume of a bolt, pencil, keys, etc.
- Start with a graduated cylinder (large enough to fit the object being measured) fill with enough water to cover the object. Read the graduated cylinder and write down how much liquid volume you have before the object is added. Add the object to the graduated cylinder and read the new liquid volume.
- This method is called VOLUME DISPLACEMENT. This is because the object displaces the water.
- Example: (Liquid Volume After, with object, - 33 ml) --- (Liquid Volume Before, without object, - 23 ml) = 10ml
Because 1ml = 1cm3, you can say that the volume of the irregular object has a volume of 10cm3

Week of 9/14 - 9/18

This week we will continue to learn about accuracy and precision by doing/completing the accuracy and precision lab. You then will learn about density (which is why we had to learn about mass and volume first) and then we will participate in the Metric Olympics!!!

After the day of fun-filled, learning activities, you will take a test on:
1) Scientific Measurement (measuring distance in cm and mm, measuring mass in grams with the triple-beam balance, and learning how to read graduated cylinders)
2) Volume (volume of a liquid, volume of a solid, and volume displacement)
3) Accuracy and Precision
4) Density


This will be a closed-note test, but you should be completely fine if you have been doing your work in class. Make sure you ask questions in class, post comments, or come by Tuesday during tutoring time in order to make sure that you are prepared to make that 100 on the test!!!

Happy Measuring!!!

Miss Hamilton

Accuracy vs Precision

Accuracy - refers to the correctness of a measurement

Precision - refers to the reproducability of a measurement (do something over and over again)

Bullseye Example:

Accuracy is hitting the bullseye

Precision is hitting a certain point of the target over and over again

In science, and many other fields, the goal is to be accurate and precise. You want to hit the bullseye over and over again. You want to make that field goal every time you kick that extra point. You want to make that basket every time you line up at the foul line.

E.Q. #8

How do you discern between an accurate measurement and a precise measurement?

Quiz on Friday

All morning classes will have a quiz on the measurement information that we have covered so far in the past couple of days.

Some of us are starting to slip by:

1. Not being prepared for class
2. Having a bad attitude when coming to class
3. Coming to class thinking it is social time

Now is the time to make the change. We are still at a point in the school year where you can easily make a change in your classroom/study/organization habits. Let's get focused and start learning. I shouldn't have to tell you to sit down and be quiet more than once during a class (and currently this is not the case).

Parents, please have a talk with your students about being prepared and on task.

Happy Learning!!!

Miss Hamilton

E.Q. # 7

What is the difference between mass and volume?

E.Q. # 6

Why is it important to have standards of measurement?

Measurements Unit Preview

We will now be moving on to our measurements unit. Beginning with reading a ruler, we will learn how to measure in cm and mm. We will then move on to reading triple-beam balances and graduated cylinders.

After this, we will have a fun lab activity called the Metric Olympics! Students will compete in different activities to test their skills and knowledge of the metric system.

After this we will move onto density and precision vs. accuracy.

Then we will have a test on all of the above.

All of this information is crucial to success in the lessons ahead.

Scientific Method, Controls and Variables, & Graphs Quiz

Students will have a quiz on the Friday, September 4th (morning classes and 5/6 A Day) and on September 8th (7/8 B Day)

This will be open notes so you should be ok if you have been good about keeping up with your notebook and notes.

Happy Studying!!!

Miss Hamilton

Notes on Graphs:

There are three types of graphs:

1) Line Graph- shows relationship in which a change in the independent variable (manipulated by the experimenter) changes the dependent variable (what the experimenter is looking for a response from)
Rules:
*the graph scale should be readable and make sense
*the independent variable will always be on the x axis
*units should be consistent

2) Bar Graph- communicates data through counting; think of this as when you would tally scores or votes. (Example in class was we came up with four food choices for lunch...chicken, pizza, sub, chicken, burger. When we counted them up, food choices were on the x-axis and numbers were on the y-axis)

3) Circle Graph- lists part of a whole; percentages (Example was the "day in the life" students broke their day down into different activities such as sleeping, eating, school...etc and had to assign hours to eat activity to add up to 24 hours. Then, each student was required to create a pie chart out of the data they collected.)

Homework

Read Chapter 1 Section 3 in your textbook and turn in an outline of what you read.

Happy graphing!!!

Miss Hamilton

E.Q.'s so far:

#1 What is lab safety and why is it important?
#2 What are the tools of a scientist?
#3 What are the steps in the scientific method?
#4 How can you distinguish between an independent and a dependent variable?
#5 How can a scientists communicate their data?