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Mixtures and Solutions Answer Key

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Mixtures
#1 What is the term used to describe anything that has mass and takes up space? Matter
#2 True or False: A mixture is a combination of substances that keep their properties. True
#3 Give an example of a mixture that can be separated into the original substances varies
#4 Name three examples of mixtures that we've observed in this class. Varies. Examples: Bean mixture, fruit salad, sand in water
#5 The characteristics used to describe matter are ________________ Properties of matter
Particles
#1 True or False: All matter is made up of tiny particles. True
#2 Particles move ________________ when they are cold. Slower
#3 Particles move ________ when energy (heat) is added. Faster
#4 The smallest particles of matter are.... Atoms!
#5 When two or more atoms join together, they are called a... Molecule
Solutions
#1 If all parts of a mixture are evenly distributed, the mixture is a _____________. Solution
#2 How could you separate a solution of salt and water? Evaporate the water!
#3 Can solutions be separated? Yes!
#4 Give one example of a solution we have seen in class Varies
#5 Give two examples of solutions we have seen in class that haven't been named yet. Varies
More solutions and mixtures
#1 Can mixtures be separated? Yes!
#2 How would YOU define a mixture?
#3 How would YOU define a solution?
#4 Many drinks are ___________ with sugar or other particles dissolved inside. Solutions
#5 How could you separate a mixture of sand and salt? Dissolve the salt in water, then strain/filter the sand out of the liquid
Chemical and Physical changes
#1 This type of change is reversible Physical change
#2 This type of change is not reversible Chemical change
#3 Heat or cold is a sign of __________________ Chemical change
#4 List one sign of a chemical change (other than heat or cold) Gas or bubbles, colour change
#5 Dissolving sugar in water is a _____________ change Physical change
Final Question
If you were given a mixture of SAND, WATER, BBs, and SALT, how could you separate it into the four different things? BBs: Separate with magnets. SAND: Filter. SALT: Evaporate water