Atoms & Molecules
Everything in the universe is made of this.
Atoms! Matter is also acceptable.
What are the 3 different states of matter?
solids, liquids, gas
Why do scientists separate mixtures?
To separate into two or more substances
What are properties?
They help us describe what is being observed of different objects.
What is the definition of an emulsifier?
an ingredient that makes unmixable liquids mix together
True or False: A desk and a sweater are both made of atoms.
True!
Draw what the molecules in a liquid looks like?
Molecules are close together but are slipping and sliding past each other
BONUS: 200 points
True or false: Water molecules are attracted to everything.
TRUE!
What are the different properties of molecules that scientists focus on? Name at least two.
weight, shape, size, attraction
True or false:
Flour is a great emulsifier for water and oil.
FALSE
How many types of molecules is a substance made of?
A substance is only made up of one type of molecule! For example, water only has one type molecule.
BONUS: 200 Points
Draw what the molecules in a gas looks like?
Molecules are bouncing around everywhere
Think back to how scientists used a filter to separate mixtures. What properties of the molecules did the scientists focus on?
They focused on the size!
I found an unlabeled container. Here were the substances properties. It was small, crystalized shapes and tasted sweet. What could it be?
Sugar!
What is the best emulsifier for water and oil?
Licithin
Is milk a substance or a mixture?
Mixture!
Draw what molecules look like in a solid.
molecules are closely packed together and vibrating against each other
Describe how chromatography works in separating the red dye.
A sample of the red dye was placed on the chromatography paper (filter paper). The paper was then placed in water. The water traveled up the paper, separating the mixture into the different substances.
BONUS: 300 Points
Ethan finds an unlabeled container. Here are the properties. He see that its red, it has a thick and smooth texture. He smells it and it has a string scent. He tastes it and it has a sweet, tangy taste! What did he find?
Ketchup!
What is a type of emulsifier? Give at least one example.
Licithin, flour, cornstarch (name one is okay)
BONUS: 300 Points
What are mixtures made up of?
Many different kinds of molecules!
How does a liquid turn into gas?
By applying heat
Think back to the fan model. Why did the velcro strips not move when the fan was blowing?
Velcro were attracted to the felt paper.
Jackie is helping her mom make cookies. Her mom tells her to get the flour. She looks in the cabinet and finds two unlabeled containers with white substances in it. She knows that flour molecules are not attracted to water molecules. What should she do to figure out which container has the flour?
She should conduct an investigation with water to see which one is not attracted to the water molecules.
BONUS : 300 Points
Draw a model on the nanoscale level showing what it looks like when you add an emulsifier into water and oil.
It should show the emulsifier "gluing" the oil and water molecules together.