Evidence of New Substance Formed - 5th Grade Science
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Identify the evidence: A candle burns and gives off heat and light. Did a new substance form?
Identify the evidence: A candle burns and gives off heat and light. Did a new substance form?
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Yes, a new substance formed. Combustion produces new substances like CO₂ and water vapor.
Yes, a new substance formed. Combustion produces new substances like CO₂ and water vapor.
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Which option is the best evidence of a chemical change: temperature change from reaction or bending a wire?
Which option is the best evidence of a chemical change: temperature change from reaction or bending a wire?
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Temperature change from reaction. Heat from mixing chemicals indicates a chemical reaction.
Temperature change from reaction. Heat from mixing chemicals indicates a chemical reaction.
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Which option is the best evidence of a physical change: forming a precipitate or crushing a can?
Which option is the best evidence of a physical change: forming a precipitate or crushing a can?
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Crushing a can. Crushing only changes shape, not chemical composition.
Crushing a can. Crushing only changes shape, not chemical composition.
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Which statement best supports that a new substance formed: only size changed or gas and odor appeared?
Which statement best supports that a new substance formed: only size changed or gas and odor appeared?
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Gas and odor appeared. Multiple signs (gas + odor) strongly indicate chemical change.
Gas and odor appeared. Multiple signs (gas + odor) strongly indicate chemical change.
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Identify the evidence: Ice melts into liquid water. Did a new substance form?
Identify the evidence: Ice melts into liquid water. Did a new substance form?
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No, no new substance formed. Melting is a physical change; water remains H₂O.
No, no new substance formed. Melting is a physical change; water remains H₂O.
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Identify the evidence: Water boils and becomes steam. Did a new substance form?
Identify the evidence: Water boils and becomes steam. Did a new substance form?
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No, no new substance formed. Boiling is a physical change; steam is still water molecules.
No, no new substance formed. Boiling is a physical change; steam is still water molecules.
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Identify the evidence: Paper is cut into smaller pieces. Did a new substance form?
Identify the evidence: Paper is cut into smaller pieces. Did a new substance form?
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No, no new substance formed. Cutting only changes size and shape, not chemical composition.
No, no new substance formed. Cutting only changes size and shape, not chemical composition.
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Identify the evidence: An iron nail turns reddish-brown after days outside. Did a new substance form?
Identify the evidence: An iron nail turns reddish-brown after days outside. Did a new substance form?
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Yes, a new substance formed. Rust (iron oxide) is a new substance formed by oxidation.
Yes, a new substance formed. Rust (iron oxide) is a new substance formed by oxidation.
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Which observation is strong evidence of a new substance: a new odor appears or the material is flattened?
Which observation is strong evidence of a new substance: a new odor appears or the material is flattened?
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A new odor appears. New odors mean new molecules with different properties formed.
A new odor appears. New odors mean new molecules with different properties formed.
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Which observation is strong evidence of a new substance: a solid precipitate forms or the object is cut?
Which observation is strong evidence of a new substance: a solid precipitate forms or the object is cut?
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A solid precipitate forms. Precipitates are new solid substances formed from mixing liquids.
A solid precipitate forms. Precipitates are new solid substances formed from mixing liquids.
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Which observation is strong evidence of a new substance: gas bubbles forming or melting?
Which observation is strong evidence of a new substance: gas bubbles forming or melting?
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Gas bubbles forming. Gas production indicates a chemical reaction creating new substances.
Gas bubbles forming. Gas production indicates a chemical reaction creating new substances.
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Which observation is strong evidence that a new substance has formed: color change or shape change?
Which observation is strong evidence that a new substance has formed: color change or shape change?
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Color change. New substances often have different colors than the originals.
Color change. New substances often have different colors than the originals.
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What is the best definition of a physical change in matter?
What is the best definition of a physical change in matter?
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A change in form or state with no new substance formed. The same substance exists before and after, just in a different form.
A change in form or state with no new substance formed. The same substance exists before and after, just in a different form.
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What is the best definition of a chemical change in matter?
What is the best definition of a chemical change in matter?
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A change that forms one or more new substances. New substances have different properties than the original materials.
A change that forms one or more new substances. New substances have different properties than the original materials.
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Identify the evidence: Vinegar and baking soda fizz and release gas. Did a new substance form?
Identify the evidence: Vinegar and baking soda fizz and release gas. Did a new substance form?
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Yes, a new substance formed. Gas production indicates a chemical reaction occurred.
Yes, a new substance formed. Gas production indicates a chemical reaction occurred.
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Identify the evidence: Two clear liquids mix and a cloudy solid appears. Did a new substance form?
Identify the evidence: Two clear liquids mix and a cloudy solid appears. Did a new substance form?
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Yes, a new substance formed. A precipitate forming is strong evidence of a chemical change.
Yes, a new substance formed. A precipitate forming is strong evidence of a chemical change.
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Which option is NOT strong evidence of a new substance forming: change in size or new odor?
Which option is NOT strong evidence of a new substance forming: change in size or new odor?
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Change in size. Size changes are physical; the substance composition stays the same.
Change in size. Size changes are physical; the substance composition stays the same.
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Which option is NOT strong evidence of a new substance forming: change of state or gas produced?
Which option is NOT strong evidence of a new substance forming: change of state or gas produced?
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Change of state. State changes are physical; the substance remains the same.
Change of state. State changes are physical; the substance remains the same.
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Which option is NOT strong evidence of a new substance forming: dissolving or precipitate forming?
Which option is NOT strong evidence of a new substance forming: dissolving or precipitate forming?
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Dissolving. Dissolving is physical; the substance can be recovered unchanged.
Dissolving. Dissolving is physical; the substance can be recovered unchanged.
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Which observation is strong evidence of a new substance: heat/light produced or dissolving in water?
Which observation is strong evidence of a new substance: heat/light produced or dissolving in water?
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Heat or light produced. Energy release indicates chemical bonds breaking and forming.
Heat or light produced. Energy release indicates chemical bonds breaking and forming.
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