Fall 2024 Semester Science Exam Review

Flashcard
•
Science
•
7th Grade
•
Hard
Wayground Content
FREE Resource
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more elements are chemically bonded together.
2.
FLASHCARD QUESTION
Front
What is the primary purpose of wearing safety goggles in a laboratory?
Back
To protect eyes from chemical splashes.
3.
FLASHCARD QUESTION
Front
What is an element?
Back
An element is a pure substance that cannot be broken down into simpler substances by chemical means.
4.
FLASHCARD QUESTION
Front
How are elements represented?
Back
Elements are represented by symbols, such as H for hydrogen and O for oxygen.
5.
FLASHCARD QUESTION
Front
What are the characteristics of a compound?
Back
1. Compounds are made from two or more elements. 2. A compound is a pure substance. 3. Compounds are represented by a chemical formula.
6.
FLASHCARD QUESTION
Front
What is a chemical formula?
Back
A chemical formula is a way of expressing the composition of a compound using symbols and numbers, e.g., H2O for water.
7.
FLASHCARD QUESTION
Front
What is the difference between an element and a compound?
Back
An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded.
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