Q2 Science Practice Assessment

Flashcard
•
Science
•
8th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What does the Law of Conservation of Mass state?
Back
The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of the reactants equals the total mass of the products.
2.
FLASHCARD QUESTION
Front
What is a pure substance?
Back
A pure substance is a material that has a constant composition and cannot be separated into other substances by physical means. Examples include elements and compounds.
3.
FLASHCARD QUESTION
Front
What is the smallest unit of matter?
Back
The smallest unit of matter is an atom, which is the basic building block of all substances.
4.
FLASHCARD QUESTION
Front
What is replication in scientific experiments?
Back
Replication is the process of repeating an experiment to verify results. It involves following the same procedures as the original experiment.
5.
FLASHCARD QUESTION
Front
What is the pH scale?
Back
The pH scale is a measure of how acidic or basic a substance is, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.
6.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more elements chemically bond together in fixed proportions.
7.
FLASHCARD QUESTION
Front
What is a mixture?
Back
A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.
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