Checkpoint Review #1
Flashcard
•
Science
•
7th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is an element?
Back
An element is a substance that cannot be broken down into simpler substances and is made of only one kind of atom.
2.
FLASHCARD QUESTION
Front
What evidence indicates a chemical change has occurred?
Back
Evidence of a chemical change includes observable signs such as fizzing, color change, or the formation of a new substance.
3.
FLASHCARD QUESTION
Front
How many elements are in the compound CaCO3?
Back
There are 3 elements in CaCO3: Calcium (Ca), Carbon (C), and Oxygen (O).
4.
FLASHCARD QUESTION
Front
What is dilution in a scientific context?
Back
Dilution is the process of reducing the concentration of a solute in a solution, typically by adding more solvent.
5.
FLASHCARD QUESTION
Front
In a Kool-aid mixture, what is the solvent?
Back
The solvent in a Kool-aid mixture is water.
6.
FLASHCARD QUESTION
Front
What is a mixture?
Back
A mixture is a combination of two or more substances where each substance retains its own properties.
7.
FLASHCARD QUESTION
Front
What is a chemical change?
Back
A chemical change is a process where substances combine or break apart to form new substances with different properties.
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