
8th Grade Unit #4 Changes in matter practice
Flashcard
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Science
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8th Grade
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Practice Problem
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Hard
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1.
FLASHCARD QUESTION
Front
What is the pH range of human blood?
Back
The pH range of human blood is between 7.38 and 7.42, indicating it is slightly basic.
2.
FLASHCARD QUESTION
Front
What defines a compound in chemistry?
Back
A compound is made up of different kinds of atoms that are chemically combined and can be broken down into simpler substances.
3.
FLASHCARD QUESTION
Front
What is a hypothesis in scientific research?
Back
A hypothesis is a proposed explanation for a phenomenon that can be tested through experiments.
4.
FLASHCARD QUESTION
Front
What is the importance of controlled experiments?
Back
Controlled experiments allow scientists to isolate variables and determine the effect of one variable on another.
5.
FLASHCARD QUESTION
Front
What does it mean if evidence fails to support a hypothesis?
Back
It means that the results of an experiment do not align with the predictions made by the hypothesis.
6.
FLASHCARD QUESTION
Front
What is the role of observations in forming a hypothesis?
Back
Observations help scientists identify patterns and make informed predictions that lead to the formulation of a hypothesis.
7.
FLASHCARD QUESTION
Front
What is the difference between qualitative and quantitative data?
Back
Qualitative data describes characteristics or qualities, while quantitative data involves numerical measurements.
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