science fair project ideas with independent and dependent variables

The dependent variables must be able to be measured and caused by the independent variable. 0000007306 00000 n The independent variable is the one that is changed by the scientist. Helpful in u. The subjects used in this experiment were under the color gel, and let the subjects grew. Sample Variables & Hypothesis - Science Buddies For your science fair project, you should change one variable to see what affect it has on another variable. In other words, they . Plant a few large seeds, such as pumpkin seeds. How does the shape of an ice cube affect how quickly it melts? Is the nutritional content of different brands of a vegetable (e.g., canned peas) the same? Independent Variable: Time (how long each battery operates in a given device), Independent variable: Type of current drain device (as quantified by low, medium, and high), Dependent variable: Voltage (same as experiment #1), Controlled variables: Same as outlined in the table for experiment #1. 0000007529 00000 n endstream endobj 312 0 obj<>/Size 295/Type/XRef>>stream We used a variety of milks in our science fair project below. Does type of hair affect the results? Does magnetism affect the growth of plants? In this experiment, the controlled variable is the angle of the board and the type of ball you roll. There are three types- an independent variable (sometimes called a manipulated variable), a dependent variable (sometimes referred to as the responding variable), and the controlled variable. Does the presence of detergent in water affect plant growth? Let the bowl sit overnight in a place away from direct sunlight. Each has an important role to play in experiments. How attentive have you been in class these past few weeks? So you turn the up the lights in Tray #1 (the independent variable) and the tomatoes get bigger (dependent variable). Fill two identical containers with two cups of water each -- one hot and one cold. Reproduction of material from this website without written permission is strictly prohibited. You will test different surfaces, such as sand paper, floor tile or bare wood, on top of the ramp and measure the time and distance that a toy car travels using at least three trials each.

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