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Physical Science Experimental Variables

Virtual Science Teac

Created on August 13, 2024

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Transcript

Daniel tested how the angle of a ramp affects the distance a toy car travels after rolling down. He adjusted the ramp to different angles (10°, 20°, 30°) and measured how far the car traveled on a flat surface.

Key Components of an Experiment

Independent Variable: The factor you change or manipulate in the experiment.Dependent Variable: The factor you measure or observe in response to changes in the independent variable. Constants: Conditions or factors that are kept the same throughout the experiment to ensure that any changes in the dependent variable are due to the independent variable alone.

1. What is the independent variable (IV) in this study?2. What is the dependent variable (DV) in this study? 3. List 2-3 constants in this study.

Emma investigates how different materials conduct heat by placing identical metal, glass, and plastic spoons in hot water and measuring the temperature at the end of each spoon after 5 minutes.

Key Components of an Experiment

Independent Variable: The factor you change or manipulate in the experiment.Dependent Variable: The factor you measure or observe in response to changes in the independent variable. Constants: Conditions or factors that are kept the same throughout the experiment to ensure that any changes in the dependent variable are due to the independent variable alone.

1. What is the independent variable (IV) in this study?2. What is the dependent variable (DV) in this study? 3. List 2-3 constants in this study.

Sofia tested how light bends when passing through different materials. She shined a laser beam at a 30° angle into glass, water, and air, measuring the angle of refraction (the angle at which the light exited each material).

Key Components of an Experiment

Independent Variable: The factor you change or manipulate in the experiment.Dependent Variable: The factor you measure or observe in response to changes in the independent variable. Constants: Conditions or factors that are kept the same throughout the experiment to ensure that any changes in the dependent variable are due to the independent variable alone.

1. What is the independent variable (IV) in this study?2. What is the dependent variable (DV) in this study? 3. List 2-3 constants in this study.

Aiden tested how distance from a magnet affects its magnetic field strength.He used a spring scale to measure the force needed to hold a metal object at different distances from the magnet.

Key Components of an Experiment

Independent Variable: The factor you change or manipulate in the experiment.Dependent Variable: The factor you measure or observe in response to changes in the independent variable. Constants: Conditions or factors that are kept the same throughout the experiment to ensure that any changes in the dependent variable are due to the independent variable alone.

1. What is the independent variable (IV) in this study?2. What is the dependent variable (DV) in this study? 3. List 2-3 constants in this study.

Layla tested how the density of liquids affects an object’s ability to float. She used a small wooden block and placed it in water, saltwater, and oil, measuring how much of the block was submerged in each liquid.

Key Components of an Experiment

Independent Variable: The factor you change or manipulate in the experiment.Dependent Variable: The factor you measure or observe in response to changes in the independent variable. Constants: Conditions or factors that are kept the same throughout the experiment to ensure that any changes in the dependent variable are due to the independent variable alone.

1. What is the independent variable (IV) in this study?2. What is the dependent variable (DV) in this study? 3. List 2-3 constants in this study.

Emma explored how different surfaces affect the amount of friction by sliding a block of wood across smooth, rough, and carpeted surfaces. She measured the force required to pull the block across each surface using a spring scale.

Key Components of an Experiment

Independent Variable: The factor you change or manipulate in the experiment.Dependent Variable: The factor you measure or observe in response to changes in the independent variable. Constants: Conditions or factors that are kept the same throughout the experiment to ensure that any changes in the dependent variable are due to the independent variable alone.

1. What is the independent variable (IV) in this study?2. What is the dependent variable (DV) in this study? 3. List 2-3 constants in this study.

Ethan investigated how the pitch of a sound changes with the length of a vibrating string. He used strings of different lengths (10 cm, 20 cm, 30 cm) on a simple musical instrument and measured the pitch of the sound produced.

Key Components of an Experiment

Independent Variable: The factor you change or manipulate in the experiment.Dependent Variable: The factor you measure or observe in response to changes in the independent variable. Constants: Conditions or factors that are kept the same throughout the experiment to ensure that any changes in the dependent variable are due to the independent variable alone.

1. What is the independent variable (IV) in this study?2. What is the dependent variable (DV) in this study? 3. List 2-3 constants in this study.

Ava built simple circuits to test how the number of batteries affects the brightness of a light bulb. She connected 1, 2, 3, 4, and 5 batteries in series and measured the brightness of the bulb using a light meter.

Key Components of an Experiment

Independent Variable: The factor you change or manipulate in the experiment.Dependent Variable: The factor you measure or observe in response to changes in the independent variable. Constants: Conditions or factors that are kept the same throughout the experiment to ensure that any changes in the dependent variable are due to the independent variable alone.

1. What is the independent variable (IV) in this study?2. What is the dependent variable (DV) in this study? 3. List 2-3 constants in this study.