This Grade 5 challenge worksheet explores mixtures and solutions, including separating sand and salt, evaporating salt water, and using magnets to pick out iron. Through multiple choice and fills, fifth graders explain why mixing is usually a physical change and connect lab techniques to NGSS 5-PS1 ideas about matter and properties. Students analyze multi-step reactions and identify signs of chemical change in advanced Grade 5 scenarios that build strong reasoning skills today and tomorrow.
Style:
Chemical and Physical Changes
Part A: Multiple Choice
Circle the best answer for each question.
1. A Grade 5 student mixes sand and salt in a bowl. Which method best separates them?
A) Burn the mixture to remove the salt
B) Add water, filter the sand, then evaporate the water to get the salt
C) Wait for the mixture to chemically react and split apart
D) Use a magnet to pull out the salt
2. Which best describes salt water as a type of mixture?
A) A chemical compound formed from salt and water
B) A solution where salt is evenly dissolved in water
C) A pure substance with one kind of particle
D) A precipitate of salt at the bottom of the cup
3. A baker notices the cake batter has risen, browned, and smells different after baking. Which change happened?
A) Only a physical change, because the batter was just heated
B) A chemical change, because new substances with new properties formed
C) No change, because the ingredients are still in the cake
D) A reversible physical change that can be undone by cooling
4. Which scenario is a physical change rather than a chemical change?
A) A nail rusts after sitting in water for a week
B) A log burns in a fireplace and turns to ash
C) A glass of water evaporates and leaves it empty
D) Milk turns sour after sitting on the counter
Part B: Fill in the Blank
Write the correct answer on each line.
1. A mixture is a combination of two or more substances that are physically mixed but not chemically combined.
2. When salt dissolves evenly in water, the result is called a solution because one substance is spread evenly through another.
3. To get the salt back from salt water, you can evaporate the water until only solid salt remains in the dish.
4. Mixing iron filings and sand can be separated using a magnet to pull the iron out of the mixture.
5. Because mixtures and solutions can be separated again, mixing two substances together is usually a physical change, not a chemical one.
Chemical and Physical Changes
★ Part A: Multiple Choice
Circle the best answer for each question.
1. A Grade 5 student mixes sand and salt in a bowl. Which method best separates them?
A) Burn the mixture to remove the salt
B) Add water, filter the sand, then evaporate the water to get the salt
C) Wait for the mixture to chemically react and split apart
D) Use a magnet to pull out the salt
2. Which best describes salt water as a type of mixture?
A) A chemical compound formed from salt and water
B) A solution where salt is evenly dissolved in water
C) A pure substance with one kind of particle
D) A precipitate of salt at the bottom of the cup
3. A baker notices the cake batter has risen, browned, and smells different after baking. Which change happened?
A) Only a physical change, because the batter was just heated
B) A chemical change, because new substances with new properties formed
C) No change, because the ingredients are still in the cake
D) A reversible physical change that can be undone by cooling
4. Which scenario is a physical change rather than a chemical change?
A) A nail rusts after sitting in water for a week
B) A log burns in a fireplace and turns to ash
C) A glass of water evaporates and leaves it empty
D) Milk turns sour after sitting on the counter
★ Part B: Fill in the Blank
Write the correct answer on each line.
1) A mixture is a combination of two or more substances that are physically mixed but not chemically combined.
2) When salt dissolves evenly in water, the result is called a solution because one substance is spread evenly through another.
3) To get the salt back from salt water, you can evaporate the water until only solid salt remains in the dish.
4) Mixing iron filings and sand can be separated using a magnet to pull the iron out of the mixture.
5) Because mixtures and solutions can be separated again, mixing two substances together is usually a physical change, not a chemical one.
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9 Questions
12-18 minutes
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