Investigating Dissolving

Today we were exploring a special type of mixing called dissolving. We investigated what happens when you try to dissolve a solid into a liquid. We discovered that:

* some substances dissolve more easily than others
* some substances need to be stirred before they will dissolve
* hot water works better than cold because the molecules are moving faster.

Some of our solutions were very tasty!

Try the quiz about dissolving particles at this website  http://ewart.org.uk/science/structures/str6.htm

Week 4 News Reporters

Riley and Kennedy were our News Reporters on Friday. Thank you for sharing stories about your bears with us.

Volcanoes!

Erupting Volcanoes

On Friday the Tuatara Reading Group made some volcanoes. Today Mrs DeVries had some white vinegar and some malt vinegar. First we put a spoon of Baking Soda into the volcano. Then Hannah and Kennedy poured the vinegar and food colouring into the volcano and it started to fizz, bubble and burst. The vinegar came out the top and oozed down the volcanoes. It fell on the ice cream container lid and slid onto the table. It moved everywhere.

by Maiya

Big Boom Volcano

Big volcano erupting

Lava bubbling oozing everywhere

Interesting volcano rocks

Vinegar smells yucky

Quickly bubbling 

Lava Erupting

The way it explodes

Hannah & Kennedy

Did a good job

Vinegar smell

Malt and white

In each one

Lava

Rocks erupting

More ash and lava

More and more

Boom Fizz Pop Bubble

Tuatara Reading Group is great.

Fun! Fun! Fun!

by Laila

Assembly Certificates

Congratulations to Grace, Samantha and Hannah who received certificates at the Syndicate Assembly on Wednesday. We are proud of you.

Our fantastic portraits!

During term 1 and part of term 2 Room 19 have been creating portraits using mixed media.  Have a look at some of our fabulous portraits!  If you would like to see more come in to our class and have a look.

Solid, Liquid or Gas?

Today we having been thinking about the three states of matter - solid, liquid and gas. We watched a clip on schooltube that was very cool and then we practiced being molecules. Check out the clip "Phaze  Change" under the Science Sites at the side of the blog.

Solid Molecules - tightly packed together.

Liquid Molecules - moving gently around each other

Gas Molecules - Racing around bouncing off each other

A drink bottle (solid) with water (liquid) molecules inside.

Mathletics Reminder

The last day for registration is MONDAY!!

If you want to participate (HIGHLY RECOMMENDED!) go the the link at the side of our Blog.

Moving Milk!

Our science experiment this week involved some common kitchen chemicals. We had some questions/wonderings at the end of the experiment that you might like to investigate further.


Moving Milk


You will need:
Blue Milk
Assorted Food colourings
Small amount of Detergent (in a milk bottle cap)
Shallow bowl or plate
Cotton bud


Method:


1. Pour milk into the bowl.
2. Put drops of different food colourings around the perimeter of the bowl.


MAKE A PREDICTION!
What do you think will happen when a small amount of detergent is dripped into the centre of the bowl?


Remember to use our SOLO hypothesis format of;


I think ......  because .......   and .......


3. Dip one end of the cotton bud into the detergent and drip into the milk. Do not stir!


OBSERVE
What can you see happening? 


INTERPRETATION
Why was the milk moving? 


WONDERINGS FROM ROOM 19
I wonder if you can you use different colours?
I wonder if the colour of the detergent make a difference?
I wonder if it works faster if you stir it?
I wonder what would happen if you used warm/very cold milk?
I wonder if it will work with flavoured/different types of milk?

Bridge Challenge

The Tuatara Reading group have been reading a book called "The Impossible Bridge". At the end of the book was a challenge to make a bridge out of one piece of A4 paper. It could only be cut or torn once and no cellotape was allowed. The bridge had to be strong enough to support a toy car (or in this case a plastic bug).  Here are some of the creative ways they solved the problem.

Sam was proud of
how strong his
bridge was.

Grace used some
tricky folding
techniques for her
bridge support.

Anastasia & Riley combined
their resources - and those of
other "engineers" to increase
the span of their bridge.

Hannah explored using
glue on her bridge support.

Kennedy discovered
that a paper bridge is NOT impossible
after all.

Sid's Latest Adventures

Well, Sid has certainly been getting around New Zealand the last couple of weeks. It looks like his adventure is going to continue for bit longer so I have started a Tab for us to record what he is up to. The first entry is from Samantha, thanks Samantha.

Science Science Science!

What is in the Box?

Observations     Predictions     Questions     Explanations

This afternoon we saw blue liquid poured into the top of a box and clear liquid came out the bottom. But how did it happen?

Your challenge is to draw and label a diagram to explain what you think is going on inside the box. As an extension you could make your own "What's in the box?" to see if your idea will work.

Give it a go - WHAT DO YOU THINK?