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Physical and Chemical Changes

What happens when water boils? The liquid water becomes a gas
If a chemical change happens, what observations might you see? Change in color or odor
If a physical change happens, what observations might you see? Change in size or shape
What happens to a sugar cube that is placed into a cup of hot water? It dissolves
Materials combine to create a new compound: Chemical Change
Materials mix, but a new compound is not made: Physical change
What are the 3 States of matter? Solid, liquid and gas
Anything that has mass and takes up space is know as: Matter
Ice melting is a chemical change (T/F) FALSE
Baking powder fizzing is a chemical change (T/F) TRUE
Salt added to water is a physical change (T/F) TRUE
What is solid water? Ice
What is produced when water is boiled? Steam (Water in the form of a gas)
Water at room temperature is a liquid (T/F) TRUE
Which of these 2 liquids is a mixture, made of parts that can be separated by filtration? (Distilled water, orange juice, milk, salt water, sugar water) salt water and sugar water
Physical changes change the matter into something completely different. T/F FALSE
Physical changes begin and end with the same compounds TRUE
You can filter salt out of water by pouring the solution through filter paper, but what is the BEST and most efficient way to separate the salt from the water? Heat the solution to boiling and evaporate off the water
How can you change ice to liquid water? Apply heat
To make something warmer Increase temperature
To make something colder Decrease temperature
Molecules move faster as heat is increased T/F TRUE
Burning wood and turning into ask in a fireplace is know as a mixture. (T/F) FALSE
When wood burns there is a size, shape and color change. There is gas (smoke) and a smell involved. These are clues that help you to know that a ______________ change took place. Chemical
Rocks, shells and other particles are mixed together to form soil. This is an example of a ____________ Mixture
Mass, volume, shape, size, density and color are examples of: Properties of matter
How tightly packed particles are in an object Density
If an object floats, it is ________ dense than the water less
If an object sinks, it is ________ dense than the water more
Amount of space an object takes up is known as: Volume
The pull of gravity on an object is known as: Weight
The amount of matter inside an object is known as: Mass
When a solid changes to a liquid, It's called the _________ point. Melting
When a liquid changes to a solid, it is called the ________ point. Freezing
When a liquid changes to a gas, it is called the ________ point. Boiling
When a liquid changes to a gas without boiling, it is called ________ Evaporation
When a gas changes into a liquid (drops of water), it is called ________ Condensation
Created by: apetrillo