CHEMICAL CHANGES
What are clues to chemical changes?
smell,color,taste,temperatyre,new substace.
when you put ice outside what happens to it?
melts/evaporates
Solid Water + Heat =
liquid water
What is a chemical change? Provide 2 examples of chemical changes.
A chemical change is a change in matter where a new substance is formed. Possible examples: tarnished silverware, spoiled milk, moldy bread, burnt toast, rust, rotting fruit, baking cookies, digesting/chewing food, mixing an acid and base (baking soda and vinegar)
what does physical change mean?
physical change that doesn't give you a new substance.
what does chemical change mean?
results in or more new substance.
As heat is being added, what is happening to the water that is escaping?
evaporating
Liquid water + heat =
gas or water vapor
What is the name of the change in state of matter? ___ Solid to Liquid ___ Liquid to Solid ___ Liquid to Gas ___ Gas to Liquid
melting, freezing, evaporating,condensation
what is physical property?
traits involve how a substance by itself.
what is chemical property?
properties that involve how a substance interacts with another substance.
17. In which of the following scenarios would the water evaporate the fastest? A. In the fridge B. Outside in the summer C. On a table in a house.
b. outside in the summer
Liquid water – heat =
Solid water
What is water in all 3 states of matter? Water as a solid is ___________________. Water is what state of matter ____________. Water as a gas is _____________________.
ice, liquid, water vapor
What change would cause a substance to melt?
heat being added
Which phase change takes place when heat is removed from water? A. Liquid to gas B. Solid to liquid C. Liquid to solid
c. liquid to solid
What state of matter has a definite shape and volume?
Solid
Gas - heat=
liquid
What will happen to the water if it is left in the sun for an extended amount of time?
it will turn into gas
Which state of matter has no definite shape or volume of its own?
gas