This Grade 5 worksheet focuses on signs of chemical change — color changes, gas bubbles, light, heat, smell, and precipitates — plus the law of conservation of matter. Students complete fills and matching items connecting real reactions like vinegar and baking soda to the evidence they show in NGSS 5-PS1 investigations. Students decide whether each scenario is physical or chemical and apply the conservation-of-matter rule to Grade 5 problems with confidence and clarity.
Style:
Chemical and Physical Changes
Part A: Fill in the Blank
Write the missing word or number on each line.
1. Bubbles forming when vinegar is poured on baking soda show that a gas has been produced, a sign of chemical change.
2. When a glow stick lights up after bending, the production of light is a sign of a chemical change.
3. If a reaction makes the test tube feel warmer, energy is being released as heat, indicating a chemical change.
4. A sour or rotten smell from food going bad is another clue that a chemical change has occurred.
5. When two clear liquids are mixed and a solid forms at the bottom, that solid is called a precipitate and signals a chemical change.
6. The law of conservation of matter says that the total mass before and after a chemical reaction stays the same.
7. If 10 grams of baking soda reacts with 20 grams of vinegar in a sealed bag, the total mass after the reaction is 30 grams.
8. The starting substances in a chemical reaction are called reactants, and the substances that form are called products.
9. A surprising color change in a mixture, like clear liquids turning blue, is one of the most obvious signs of a chemical reaction.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Bubbles in vinegar and baking soda
→ Gas produced as a sign of chemical change
Light produced as a sign of chemical change
Glow stick lighting up
→ Light produced as a sign of chemical change
Conservation of matter in a reaction
10 g + 20 g sealed reaction equals 30 g
→ Conservation of matter in a reaction
Reactants forming a new product
Iron and oxygen combine to form rust
→ Reactants forming a new product
Gas produced as a sign of chemical change
Chemical and Physical Changes
★ Part A: Fill in the Blank
Write the missing word or number on each line.
1) Bubbles forming when vinegar is poured on baking soda show that a gas has been produced, a sign of chemical change.
2) When a glow stick lights up after bending, the production of light is a sign of a chemical change.
3) If a reaction makes the test tube feel warmer, energy is being released as heat, indicating a chemical change.
4) A sour or rotten smell from food going bad is another clue that a chemical change has occurred.
5) When two clear liquids are mixed and a solid forms at the bottom, that solid is called a precipitate and signals a chemical change.
6) The law of conservation of matter says that the total mass before and after a chemical reaction stays the same.
7) If 10 grams of baking soda reacts with 20 grams of vinegar in a sealed bag, the total mass after the reaction is 30 grams.
8) The starting substances in a chemical reaction are called reactants, and the substances that form are called products.
9) A surprising color change in a mixture, like clear liquids turning blue, is one of the most obvious signs of a chemical reaction.
★ Part B: Matching
Match each item on the left to the correct answer on the right.
1) Match each item to its correct answer.
Bubbles in vinegar and baking soda
→ Gas produced as a sign of chemical change
Light produced as a sign of chemical change
Glow stick lighting up
→ Light produced as a sign of chemical change
Conservation of matter in a reaction
10 g + 20 g sealed reaction equals 30 g
→ Conservation of matter in a reaction
Reactants forming a new product
Iron and oxygen combine to form rust
→ Reactants forming a new product
Gas produced as a sign of chemical change
Ready to Practice?
Complete each section carefully.
10 Questions
10-15 minutes
Auto-graded
Retry anytime
🏆
Questions Correct
0
Correct
0
Incorrect
0
Skipped
0:00
Time
0%
Score
Review Your Answers
See what you got right, missed, or skipped.