8th Science STAAR Practice Test

Front

What is the scientific method?

Back

A systematic process used for scientific investigation, involving observation, hypothesis formulation, experimentation, and conclusion.

Front

Define hypothesis.

Back

A testable prediction about the relationship between two or more variables.

Front

What is a variable in an experiment?

Back

Any factor, trait, or condition that can exist in differing amounts or types.

Front

What is the difference between independent and dependent variables?

Back

Independent variables are manipulated by the researcher, while dependent variables are measured to see how they are affected by changes in the independent variable.

Front

What is a control group?

Back

A group in an experiment that does not receive the treatment and is used as a benchmark to measure how the other tested subjects do.

Front

What is the purpose of a scientific experiment?

Back

To test a hypothesis and determine if it is supported or refuted by the data collected.

Front

What is a conclusion in scientific research?

Back

A summary of the results of an experiment, stating whether the hypothesis was supported or not.

Front

What is the importance of repeating experiments?

Back

To ensure reliability and accuracy of results, confirming that findings are consistent.

Front

Define ecosystem.

Back

A community of living organisms interacting with their physical environment.

Front

What is photosynthesis?

Back

The process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.