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Science Unit 4 Review
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What are three ways to separate mixtures?
Filtration, evaporation, distillation
What is distillation used for?
Used to separate a liquid from a solution
What is evaporation used for?
Used to separate a soluble soid from a homogenous solution
What is filtration used for?
Used to separate an insoluble solid from a hetergenous mixture
What is a solvent?
The substance that dissolves the solute
What is a solute?
The substance that dissolves
What is homogenous mixture where one substance disolves in another?
Solution
What is a homogenous mixture?
We can't see the separate substances
What is a heterogenous mixture?
We can see the separate substances
What are the two types of mixtures?
Heterogenous and Homogenous
Make yogurt. Physical or chemical?
Chemical
Leave an iron nail in water. Physical or chemical?
Chemical
Roll plastacine. Physical or chemical?
Physical
Burn paper. Physical or chemical?
Chemical
Freeze water. Is this physical or chemical?
Physical
Melt butter. Is this a physical or chemical change?
Physical
What are the four chemical changes?
Rot, Rust, Burn, Ferment
What is a chemical change?
The composition of matter changes
What re the four physical changes?
Shape, Place, State, Temperature
Can physical or chemical changes by reversed?
Physical
What is a physical change?
Composition of the matter doesn't change
What are the two ways matter can change?
Physical and chemical changes
How do we calculate density?
Mass divided by volume
What is density?
The amount of mass that there is in the volume of an object
How do we measure mass?
Grams and kilograms
How do we measure volume?
Cubic centimetres
What is mass?
The amount of matter
What is volume?
The amount of space that matter occupies
Whatre the three properties of matter?
Volume, mass, density
Plastic materials are easy to bend. True or false?
True
Metal is hard and fragile. True or False?
False
Salt is insoluble in water. True or False?
False
Plastic and wood are thermal insulators. True or flase?
True
A thermal conductor never gets hot. True or false?
False
Is metal a thermal conductor or insulator?
Conductor
What are the two types of thermal conductivity?
Thermal conductors and insulators
Is salt soluble or insoluble?
Soluble
What is solubility?
Describes if a material can dissolve in water
What are the three properties of matter?
Physical properties, solubility, thermal conductivity
What are the three physical properties of matter?
Hard or soft, tough or fragile, plastic or elastic
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