8th grade semester final - 2023

Front

What is the effect of high acidity on plant health?

Back

High acidity is harmful to this type of plant.

Front

How many atoms are in the compound 5Na3PO4?

Back

40

Front

What trend can be observed in atmospheric carbon dioxide levels since 1880?

Back

Atmospheric carbon dioxide levels have been rising at an increasingly higher rate as the past century has progressed.

Front

What variables should be controlled in a plant growth experiment with different liquids?

Back

Type of plant, flower pot, soil, and amount of sunlight.

Front

What measurement do we find using a graduated cylinder?

Back

Volume.

Front

What is the pH scale used for?

Back

The pH scale measures the acidity or alkalinity of a solution.

Front

What is a control group in an experiment?

Back

A control group is a standard for comparison that is not exposed to the experimental treatment.

Front

What is the definition of an independent variable?

Back

An independent variable is the factor that is changed or manipulated in an experiment.

Front

What is the definition of a dependent variable?

Back

A dependent variable is the factor that is measured or observed in an experiment.

Front

What is the purpose of a hypothesis in scientific experiments?

Back

A hypothesis is a testable prediction about the relationship between variables.