Fall Semester Exam
Flashcard
•
Science
•
7th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a molecule?
Back
A molecule is a group of two or more atoms bonded together. For example, Cl₂ is a molecule made of two chlorine atoms.
2.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance made up of two or more different elements that are chemically combined in a fixed ratio, such as NaCl (table salt).
3.
FLASHCARD QUESTION
Front
What is the difference between an atom and a molecule?
Back
An atom is the smallest unit of an element, while a molecule is made up of two or more atoms bonded together.
4.
FLASHCARD QUESTION
Front
Define conduction.
Back
Conduction is the transfer of heat through direct contact between materials.
5.
FLASHCARD QUESTION
Front
What affects the rate of dissolution of a solute in a solvent?
Back
The rate of dissolution is affected by temperature, stirring, and the surface area of the solute.
6.
FLASHCARD QUESTION
Front
Which state of matter has a definite shape and volume?
Back
Solid.
7.
FLASHCARD QUESTION
Front
What is the process of evaporation?
Back
Evaporation is the process by which liquid turns into vapor, usually occurring at the surface of the liquid.
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