Star Ctiy Science Unit 2
The ability to react with oxygen is an example of ____
chemical property
A bonfire is an example of the property of ______
combustibility
Color is a ______ property.
physical
Glass breaking
physical
Sorting and seperating are ways to classify matter using __________ properties
physical
Sratching a silver teaspoon is a _____ change
physical
ammonia is a gas at room tepmerature
physical
crushing a can
physical
cutting grass
physical
hammering wood together
physical
melting butter
physical
water boils at 100 degrees Celsius
physical
You can seperate sugar from sand because sugar is _______ and sand is not.
soluble in water
Density
the amount of mass a material has in a given volume
vinegar reacts with baking soda
chemical
wood is flammable
chemical
Physical Property
Any characteristic of a material that can be observed or measured without changing the identity of the material
Chemical Property
Any characteristic that gives a substance the ability to undergo a change that results in a new substance
Why is classifying according to chemical properties difficult?
Because a substance must be changed to observe these properties
You need to paint iron lawn furniture that has been left outside. What property makes this necessary? If the paint is chipped, what happens?
Iron reacts with oxygen. If the paint chips it will rust.
What chemical property does sliced fruit have and why?
It has the ability to react with oxygen. You can tell because the fruit turns brown.
Is whipping cream a chemical or a physical change? Why?
It is a physical change because the cream is still cream.
A dish of sugar and water solution has been left in the sun. After a few days, the solution has disappeared and a white residue remains in the dish. Is this a physical or chemical change? Why?
It is a physical change. The water has evaporated and only the sugar is left.
Bromine has a red color
Physical
Boiling Point
The temperature at which a liquid becomes a gas
A cake baking is an example of a _______ change.
chemical
A change in colore is evidence of a _____ change.
chemical
A substnaces __________ properties predict how it will react with other substances.
chemical
Flammability is a _____________ property.
chemical
Frying a hamburger is a ______ change
chemical
When a peeled banana turns black it is a ______ change
chemical
a rusting bicycle
chemical
bleaching your hair
chemical
burning leaves
chemical
fireworks exploding
chemical
frying an egg
chemical
Density
is a physical property
Mass
is physical property
The mass of the products of a chemical reaction is ________ the mass of the reactants
the same as
Where a sugar and water solution is evaporated, the sugar left behind has less mass than the original solution. The missing mass iis found in the __________ __________.
water vapor