States of Matter
Physical Change
Chemical Change
Guess the State Change
100
Name the 3 states of matter.
Solid, gas, and liquid
100
Define physical change.
Physical change is a change in shape, size, texture, or state.
It does not create a new substance and can be reversible.
100
Define chemical change.
Chemical change is when 2 or more substances mix to create a new susbtance.
It cannot be reversed.
100
What is the process called for when a solid turns into a liquid?
Melting
200
Draw a model to show how molecules are pack for each state of matter.
200
Give 2 examples of a physical change.
Dissolving sugar/salt/baking soda in water
Ripping paper
Cutting food
200
Give two examples of a chemical change.
Baking soda and vinegar
Red phenol, baking soda, and calcium chloride
Nails rusting
Baking/Cooking food
200
What's the process called when a liquid turns into a solid?
Freezing
300
Give an example of a solid, gas, and liquid.
Solid - Ice
Liquid - Water
Gas - Steam
300
What does the levels of attraction tells us about molecules?
The higher the level of attraction, the more molecules will stick.
The lower the level of attraction, the less molecules will stick.
300
What is our rule about matter?
Matter cannot be created or destroyed.
300
What's the process called when a gas turns into a liquid?
Condensation
400
Name the state(s) of matter: A cup of water
Solid - Cup
Liquid - Water
400
What's the process called when a solid turns into a gas?
Sublimation
500
Name the state(s) of this matter: Bubbles!
Liquid on the outside
Gas on the inside
500
Explain why this model shows a physical change.
The model shows a physical change because the molecules are changing from a liquid to a gas. No new substance was created since only states were changed.
The molecuels are first packed loosely, then it gets packed very far apart.
500
Explain why iron rusting is a chemical change based on the molecules seen here at the nanoscale.
Iron rusting is a chemical change because iron's and oxygen's molecules recombine to create a new substance called rust.
No matter was destroyed or created during this change.
500
What's the process called when a gas turns into a solid?
Deposition