This Grade 5 worksheet pushes fifth graders to identify chemical and physical changes in real-world scenarios. Students answer multiple-choice questions about food coloring, candles, milk and lemon juice, and precipitates, then fill in vocabulary like oxidation, combustion, and reactants. They predict outcomes and explain reasoning, building skills to distinguish chemical changes by signs such as new color, gas, odor, or precipitate, supporting NGSS 5-PS1 standards.
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Chemical and Physical Changes
Part A: Multiple Choice
Circle the best answer for each question.
1. If you add a few drops of food coloring to a glass of water, what type of change has occurred and why?
A) Physical change because the dye spreads but stays the same substance
B) Chemical change because the water turns a new color
C) Physical change because new molecules are formed in the water
D) Chemical change because oxygen bubbles appear from the dye
2. A student lights a birthday candle and the wax slowly drips down the side. Which statement best describes the changes?
A) Only a chemical change occurs as the wax drips
B) Only a physical change occurs from the burning wick
C) Both: melting wax is physical, burning wick is chemical
D) Neither change occurs because the candle stays a candle
3. Predict what happens when you mix milk and lemon juice and the milk forms small white clumps.
A) A physical change because the clumps are still liquid milk
B) A chemical change because new substances called curds form
C) A physical change because lemon juice only dissolves in milk
D) A chemical change but no new substance is created
4. A scientist mixes two clear liquids and a yellow solid suddenly forms at the bottom. What does this tell her?
A) A physical change happened because liquids changed colors
B) A physical change happened because solids formed naturally
C) A chemical change happened because a new substance appeared
D) No change occurred since the liquids are still liquids
Part B: Fill in the Blank
Write the correct answer on each line.
1. An apple slice turning brown after sitting in air is caused by oxidation, a chemical reaction with oxygen.
2. Burning a candle wick is a type of chemical change called combustion, which needs oxygen to occur.
3. Bending a paperclip changes its shape but not its substance, making this a physical change.
4. When iron reacts with oxygen and water, the new orange substance that forms is called iron oxide.
5. The starting substances in a chemical reaction are called reactants, while the new substances are products.
Chemical and Physical Changes
★ Part A: Multiple Choice
Circle the best answer for each question.
1. If you add a few drops of food coloring to a glass of water, what type of change has occurred and why?
A) Physical change because the dye spreads but stays the same substance
B) Chemical change because the water turns a new color
C) Physical change because new molecules are formed in the water
D) Chemical change because oxygen bubbles appear from the dye
2. A student lights a birthday candle and the wax slowly drips down the side. Which statement best describes the changes?
A) Only a chemical change occurs as the wax drips
B) Only a physical change occurs from the burning wick
C) Both: melting wax is physical, burning wick is chemical
D) Neither change occurs because the candle stays a candle
3. Predict what happens when you mix milk and lemon juice and the milk forms small white clumps.
A) A physical change because the clumps are still liquid milk
B) A chemical change because new substances called curds form
C) A physical change because lemon juice only dissolves in milk
D) A chemical change but no new substance is created
4. A scientist mixes two clear liquids and a yellow solid suddenly forms at the bottom. What does this tell her?
A) A physical change happened because liquids changed colors
B) A physical change happened because solids formed naturally
C) A chemical change happened because a new substance appeared
D) No change occurred since the liquids are still liquids
★ Part B: Fill in the Blank
Write the correct answer on each line.
1) An apple slice turning brown after sitting in air is caused by oxidation, a chemical reaction with oxygen.
2) Burning a candle wick is a type of chemical change called combustion, which needs oxygen to occur.
3) Bending a paperclip changes its shape but not its substance, making this a physical change.
4) When iron reacts with oxygen and water, the new orange substance that forms is called iron oxide.
5) The starting substances in a chemical reaction are called reactants, while the new substances are products.
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9 Questions
12-18 minutes
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