8th Grade Science STAAR Review 2021

Front

What is the scientific method?

Back

The scientific method is a systematic process used for scientific investigation, which includes making observations, forming a hypothesis, conducting experiments, analyzing data, and drawing conclusions.

Tags

NGSS.MS-PS1-2

Front

Define a hypothesis.

Back

A hypothesis is a testable prediction or educated guess about the relationship between two or more variables.

Tags

NGSS.MS-PS2-2

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What is the difference between independent and dependent variables?

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The independent variable is the factor that is changed or manipulated in an experiment, while the dependent variable is the factor that is measured or observed.

Tags

NGSS.MS-PS2-2

Front

What is a controlled experiment?

Back

A controlled experiment is an experiment in which all variables are kept constant except for the one being tested, allowing for a clear comparison.

Front

Explain the importance of repeatability in scientific experiments.

Back

Repeatability is important because it allows other scientists to verify results by conducting the same experiment under the same conditions.

Tags

NGSS.MS-PS2-5

Front

What is a scientific theory?

Back

A scientific theory is a well-substantiated explanation of an aspect of the natural world that is based on a body of evidence and has stood up to repeated testing.

Front

What is the role of a control group in an experiment?

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The control group serves as a baseline to compare the effects of the independent variable, helping to isolate the variable's impact.

Front

Define ecosystem.

Back

An ecosystem is a community of living organisms interacting with their physical environment, including both biotic and abiotic components.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll, converting carbon dioxide and water into glucose and oxygen.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Front

What are the three states of matter?

Back

The three states of matter are solid, liquid, and gas, each defined by the arrangement and energy of its particles.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4