Magnetism

Our Magnetism Test is scheduled for this Thursday. Please study your child's notes as well as the information below.



Opposite Poles attract each other.
So a north & south pole or a south & north pole.




Like Poles repel each other. So a north pole & another north pole or a south pole & another south pole.













Magnets are attracted to iron, copper, and certain other metals.







Electromagnets





What are they?


A coil of wire wrapped around a metal core, such as an iron bar or nail


What makes them stronger?


The properties of the core (how big it is, what material it is made of)
The size of the energy source or battery
How many coils of wire you wrap around the core, also how tightly wrapped the coils are


What happens when the electricity stops flowing?


When the electricity stops flowing in an electromagnet, it stops being magnetic.




Vocabulary Review


repel-to push away
attract-to pull toward
poles-the parts of a magnet where the magnetic force is the strongest
magnetism-the area of magnetic force around a magnet
magnet-any object with magnetic force
electromagnet-A coil of wire wrapped around a metal core, such as an iron bar or nail
compass-an instrument that uses the Earth's magnetic field to help people find directions





Did you Know???


Much of the inside of Earth is made of melted iron which creates a magnetic field that surrounds our planet. Pretty cool!!











Divide and Conquer

Division Equation Vocabulary



Division Strategies

 Division as Repeated Subtraction

42 divided by 7     Repeatedly subtract 7 from 42 until you reach a difference of 0 

42-7= 35
35-7=28
28-7=21
21-7=14
14-7=7
7-7=0

Now count how many times you subtracted 7

You subtracted 6 times, so the quotient (answer to a division equation) is 6.




More Repeated Subtraction, using powerful facts

36 divided by 2

Think powerful! If I know 2 x 1 then I know 2 x 10

So instead of subtracting 2 repeatedly, I can start by subtracting 20

36-20 = 16 (since I subtracted 20, that's the same as 10 two's)

Now think 2 x ?? = 16........ 8!

Subtract 16
16-16 = 0 (Since I subtracted 16, that's the same as 8 two's)

So how many times did I subtract 2? Well, 10 + 8 = 18

So, 36 divided by 2 = 18



Standard Algorithm





Area Model





Due to the Area Model being difficult to draw onto the blog, please read and follow the step by step guide sent home on Wednesday.


Click the link below to take you to an awesome Blendspace that shows multiple strategies for division.


Division Strategies


You can also visit http://www.cfgmath.weebly.com for lots of resources, guides, and games to help your child at home.

Lights On!

Open Circuits do not allow electricity to flow.
 
Closed Circuits allow electricity to flow.



Parallel Circuits have 2 or more pathways for electricity to flow through. If one part of the circuit broken or misplaced, one of the bulbs in the circuit will still light up.


 
Series Circuits have only 1 pathway for electricity to flow through. If one part of the circuit is broken or misplaced, the bulbs in the circuit will not light.



Conductors are items that conduct electricity or could complete a circuit by allowing electricity to flow.




Insulators are items that stop the flow of electricity.

Shocking News!

Our unit on Electricity was started this week and we are off to a great start! The students know a lot already about electricity and objects that use it.


First we watched a Bill Nye the Science Guy video (link below) and took notes of new and interesting facts about electricity. Here are some of the things students posted:


video link: https://www.youtube.com/watch?v=BhYbmcbYJn8

Then we brainstormed some objects at home or maybe that we got for Christmas that use electricity. Here are some things we came up with:

Then we used our list to decide what kind of energy those objects actually produce.

 

Light Energy 



We quickly noticed that a lot of things produce more than one form of energy!

Math @ Christmas??

I hope everyone had a great winter break!! It was wonderful to see everyone on back to school on Monday.

 

I know no one likes to think about school while they are on vacation.....BUT.....did anyone use Math over the break?

 

If you can post 1 or 2 ways that you used math over the break, you can earn 5 extra points on the Multiplication test this Friday!
You need to tell me what you did and what math concept is used.

 

Some examples may be:

• Counting $$ you got from family practices addition and decimals.
• Baking & using a recipe uses measurement.
• Going shopping with money or gift cards uses addition and estimation to make sure you have enough money to buy what you want.
• Sharing candy with friends or siblings uses division.

So how did YOU use math this Christmas?

Glowing Ice Cream??

For homework, students were asked to read an article in a Super Science magazine titled "Glowing Ice Cream".
A British inventor has created an ice cream that glows by using the protein from jellyfish. The flavor is called Bioluminescent Jellyfish.

When he licked it, the warmth from his tongue made the ice cream glow!

One scoop costs $230!!

Students were asked to read about it and respond in the form of YES! I would totally eat that OR NO way! I would NOT eat that!! Then they had to support thier answer with an explaination.

Here are just a few samples...

And my question for you is, would YOU eat glowing ice cream??

Merry Christmas from Room 219

The students did a fabulous job when given the task of creating ornaments for our class tree. Each ornament had to be a representation of something we have learned so far this year in Math and/or Science.

We've learned a lot and the ornaments show that wonderfully!

Our tree looks fantastic!!