Separating Mixtures and Solutions

Today, we mixed water and salt together. The salt dissolved in the water, and we couldn't see the little pieces anymore. We separated the salt from the water by putting it on a hot plate.

The water evaporated and the salt stayed in the cup.

The salt and the water made a special mixture, called a solution. The water chemically changed when we added salt to it, and it was harder to separate than trail mix.

Mixtures and Solutions

Today we made different mixtures. If you mix to solids together, you make a mixture. If you mix a solid and a liquid, or if you mix different liquids together, you create a solution. A solution is a special type of mixture. It's harder to separate a solution, because the solids have dissolved in the liquid.

Play this game below to separate mixtures and solutions!

Mixtures and Solutions Game

Reflection questions:

1. What are different ways you can separate a mixture?

2. How could you create a mixture and separate it?

Why does it sink or float?

Our pumpkin floated today because the stuff inside has lots of space, and there is a large cavity in the pumpkin!

Reflection questions:
What can you do to change the mass of an object?

Why did the density cubes have the same displaced volume in the water?

Changing the State of Matter

Play this game below and try to change the matter into different states. What causes the matter to boil, freeze, or melt?

Homework: Write a response to your prompt about the different phases of matter that you see in your picture.

Electromagnets

Today we made electromagnets by wrapping an iron nail with copper wire and attaching it to a battery. The nail became a magnet, because the battery sent energy through the copper wire, and gave the nail magnetic energy.

Reflection questions:

What is magnetism?

What does it mean to attract?

What does it mean to repel?

How do we use magnets?

How can you classify metals based on their magnetic properties?

Accessing Science Websites

TAKScopes
Username: Ridgecrest
Password: rge

Brainpop
Username: springbranchisd_13
Password: brainpop

Discovery Education
Username: springbranch
Password: libraries

Magical Magnets!

Today we will be testing objects to see if they are attracted to magnets. Watch this video about the magic behind magnets.

Watch this video about the magic of magnets!

Phases of Matter

Today, we made a flipbook that explained how the phases of matter can change. We melted ice cubes and wax crayons, boiled regular water and salt water, and froze water inside a plastic bag by using salt and ice cubes.

Homework assignment: Finish your flipbook. Make sure you write your own definition for "Phases of Matter", "Boiling", "Melting", and "Freezing".

Oobleck!

We've been studying solids, liquids and gases in class. Yesterday, we made something really unique called oobleck! You mix 2 teaspoons of cornstarch together with 2 teaspoons of water.

We decided that oobleck acted like a solid and liquid, and here's why.

You can hold oobleck in your hand, so it acts like a solid.

BUT...

Oobleck moves like water when you shake it in a bowl. It also spreads out in your hand, like a liquid.

So, what is it? It's both a solid and a liquid! Scientist are unable to understand why oobleck acts like two different states of matter, but they can have a lot of fun with it. Watch this video from mythbusters, as they attempt to walk across oobleck.