Reactions
Flashcard
•
Science
•
6th - 8th Grade
•
Practice Problem
•
Easy
Barbara White
Used 7+ times
FREE Resource
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12 questions
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1.
FLASHCARD QUESTION
Front
Substance Noun
[sub-stans]
Back
Substance
A form of matter with a uniform and definite composition, made of a single type of atom or molecule.
Example: This image shows different types of pure substances, including elements like tin and compounds like water, which all have a uniform composition.
2.
FLASHCARD QUESTION
Front
Property Noun
[prop-er-tee]
Back
Property
A characteristic of a substance that can be observed or measured and is used for its identification.
Example: This gold is yellow, shiny, and solid. These observable characteristics are its physical properties.
3.
FLASHCARD QUESTION
Front
Atom Noun
[at-uhm]
Back
Atom
The basic unit of a chemical element and the fundamental building block of all substances and matter.
Example: This diagram shows an atom's structure: a central nucleus with protons and neutrons, and electrons orbiting the nucleus in distinct energy shells.
4.
FLASHCARD QUESTION
Front
Molecule Noun
[mol-uh-kyool]
Back
Molecule
A group of two or more atoms held together by chemical bonds, forming a substance's smallest chemical unit.
Example: This image shows a carbon dioxide (CO₂) molecule, where one carbon atom is chemically bonded to two oxygen atoms, forming a single unit.
5.
FLASHCARD QUESTION
Front
Chemical Reaction Noun
[kem-i-kuhl ree-ak-shun]
Back
Chemical Reaction
A process where substances are converted into different substances by rearranging the atoms that compose them.
Example: Hydrogen and oxygen molecules (reactants) rearrange their atoms to form new water molecules (products), shown by the chemical equation and models.
6.
FLASHCARD QUESTION
Front
Reactant Noun
[ree-ak-tuhnt]
Back
Reactant
A starting substance that participates in and undergoes change during the course of a chemical reaction.
Example: The molecules on the left (CH₄ and O₂), labeled REACTANTS, are the starting materials that will combine and change in the chemical reaction.
7.
FLASHCARD QUESTION
Front
Product Noun
[prod-uhkt]
Back
Product
A new substance that is formed as the result of a chemical reaction between one or more reactants.
Example: In a chemical reaction, the new substances that are formed, like water (H₂O) in this diagram, are called the products.
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