%PDF-1.6 % When printing this document, you may NOT modify it in any way. Light is the independent variable, and the dependent variable is plant growth in this classroom experiment. In this experiment, the controlled variable is the angle of the board and the type of ball you roll. How attentive have you been in class these past few weeks? 0000003572 00000 n 8th Grade Science Fair Project Ideas. different colored light? Voltage of the electricity, measured in volts, Speed of rotation, measured in revolutions per minute (RPMs), Height of candle, measured in centimeters, at regular intervals of time (for example, every 5 minutes). 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. Explore Concave and Convex Mirrors STEM Activity. Independent variables are not affected by the other variables; they are independent of the others. Dependent variable - the variable being tested or . Volleyball Machine: 2019 Engineering Challenge. Teacher location: The teacher is either in the room or not in the room. There are two parts of this hypothesis, and thus two experiments: You can find this page online at: https://www.sciencebuddies.org/science-fair-projects/science-fair/sample-variables-hypothesis. What type of air freshener makes a school bus smell best to the greatest number of students? Does Water or Vinegar Clean a Penny Better? 0000001597 00000 n Are night insects attracted to lamps because of heat or light? Is a seed affected by its size? Please enter a search term in the text box. Pi Day with Apple Pie. Examples of Independent and Dependent Variables. Procedure. On the other hand, its mass and volume decrease when placed in a hypertonic solution (e.g. a variable that does not depend on another variable or other variables for its value. Check the nature of the graph. https://www.thoughtco.com/8th-grade-science-fair-projects-609030 (accessed March 4, 2023). You may print and distribute up to 200 copies of this document annually, at no charge, for personal and classroom educational use. Completely immerse the gummy bear in the water. Scientists use the scientific method to design an experiment so that they can observe or measure if changes to one thing cause something else to vary in a repeatable way. Copyright 2002-2023 Science Buddies. Check out this amazing collection of free psychology science fair projects, psychology experiment ideas, and sociology project ideas for kids. The rate of eye blinking is the dependent variable, because it differs according to the sex of the subjects. This simple trick can prove to be a cool science fair idea. Are goldfish water chemicals really necessary or are they an unneeded expense? The speed of the car, measured in distance traveled over a length of time, is the dependent variable. . kK^s](8n Here is a sample containing the variables and hypothesis. Copyright 2002-2023 Science Buddies. The relation between music and plant growth be studied better by plotting the no. This example project is designed to help students understand the concept of independent and dependent variables. 1. . You should do the project yourself, rather than enlist heavy-duty help from a parent or older student. This plant experiment studies the effects of different types of lighting on plants such as radishes and leaf lettuce. How are different soils affected by erosion? A properly designed experiment usually has three kinds of variables: independent, dependent, and controlled. Tie a weight to the end of a 3 1/2-foot string, leaving a 5-inch tail of string so you can add additional weights later in the experiment. 4. thickness of slime- Another term for this would be viscosity, which . 7 Best Dependent and Independent Variables ideas. Ways to Play with an Apple Carton. Science Fair Project Guidebook Page 3 It seems that nothing strikes fear in the hearts of students and parents like these three words: science fair project. Put the other in an area that gets only indirect sunlight. Draw conclusions about how heat effected the ants movements. If you have access to a very cold freezer, you can look at the effects of freeze and thaw cycles. All about WGU Capstone Project: Ideas, . music? repeat the same experiment with a di erent variable and obtain the same results B. Repeat the procedure with two weights and three weights. ThoughtCo. 0000003270 00000 n Compare how much sugar dissolves in containers of one cup of water, each at different temperatures. 0000002075 00000 n Mark the angle from which you will swing the pendulum, then release the weight. Is the nutritional content of different brands of a vegetable (e.g., canned peas) the same? Try some easy projects that use three variables to understand the importance of each variable in an experiment. All rights reserved. Why? Grow Your Own Bread Mold - 6th Grade Science Activities - SoD www. In our example, the independent variable is the SPF rating and the dependent variable is the level of UV radiation. After a week, remove the pennies and see which has been cleaned more. Does the shape of an ice cube affect how quickly it melts? So, you should keep all the other variables the same (you control them) so that you can see only the effect of the one variable (the independent variable) that you are trying to test. Time how long it takes to swing back and forth five times. What is the tallest tower you can build with 100 Legos? The independent variable is the one that is changed by the scientist. An independent variable is what you intentionally change in order to measure the effect of the dependent variable.To measure both of these, you must also have controlled variables: factors that remain consistent throughout every part of the experiment. A science fair project is an opportunity to research and learn about things that interest you. The Controlled Variables: You can find this page online at: https://www.sciencebuddies.org/science-fair-projects/science-fair/variables. The result will usually be that the vinegar cleans the pennies better, demonstrating that a lower-pH solution is better at cleaning discoloration due to oxidation. One swing is called a period. This experiment demonstrates how sunlight affects different kinds of plants, reinforcing the differing needs of different kinds of plant life. The data might get a bit confusing did the larger dog eat less food than the smaller dog because of his size or because it was the middle of the day and dogs prefer to eat more in the morning? ", "The work that a motor performs has a big impact on its speed, so to ensure a fair test, I must keep that variable the same.". 0000007306 00000 n What solvents (e.g., water, alcohol, vinegar, detergent solution) will remove the ink? Each has an important role to play in experiments. Do different size seeds have different germination rates or percentages? However, vinegar, which is actually an acid, can dissolve the candy. Psychology projects make for fun and . 0000001305 00000 n Think of the independent variable as what you change in an experiment, the dependent variable as the response you observe because of what you changed, and the controlled variable as the things you keep the same so they dont interfere with your results. 0000003002 00000 n 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. Analyze the data to determine if one sex blinks more frequently than the other and which one blinks the most. Reproduction in whole or in part without permission is prohibited. This is what we are observing and measuring. It is called independent because its value does not depend on and is not affected by the state of any other variable in the experiment. Also, check if the taste and/or color of the bears have changed. The Failure attribute is the dependent variable of this study and is a qualitative binary categorical variable. Small Physics Experiments Based on Buoyancy, Boat Flotation Experiments for 5th-Graders, Activities to Teach Science Process Skills to 2nd Grade, How to Test Algae Growth for a Science Fair Project, How to Measure How Much the Sun Shines on Solar Panels, Science Buddies: Variables in Your Science Fair Project, Education.com: 100 Project Ideas (page 2), JVC's Science Fair Projects: Variables: Independent, Dependent, Controlled, Ideas for Controlled-Variable Science Projects, Science Experiments on Which Colors of Candles Burn the Fastest, Science Experiment With Rocks That Absorb Water. However, it doesnt get dissolved as the gelatin is insoluble in water. Record how quickly each plant grows by measuring its growth rate with a ruler. Fill the dish with milk. ). Does the color of a crayon affect how long of a line it will write? It's free to sign up and bid on jobs. A cut and paste worksheet where they need to arrange the scientific method steps in the. Does it matter whether it contains sugar? Does it matter what the liquid is (water as opposed to juice or um.. urine)? The kids will be enthralled to display their knowledge to the audience in a fun way. What effect does soap in water have on plants? How does the voltage of an AA battery change over time when used in low, medium, and high current drain devices? You may print and distribute up to 200 copies of this document annually, at no charge, for personal and classroom educational use. 2. 2. Check out this big list of Simple Science Experiments for Kids! If I use a AA battery in any current-draining device, then the voltage of the battery will drop over time. Typed reports and posters are the norm (sorry, no handwritten text). However, imagine trying to do an experiment where one of the variables is love. Does fertilizer make a plant grow bigger? Published on November 21st 2015 by Papiya Dutta under Science Fair Projects. - WGU-C950-Project/C964 Computer Science . 8th grade science fair projects tend to involve the scientific method and designing an experiment and not making models or explaining processes. Plant the same number of small seeds, such as tomatoes. Set up a series of bowls on the table and fill them with different solutions like that of baking soda, vinegar, salt, distilled water, etc. Understanding the difference is something 9th graders are tested on in Texas, but more importantly it helps created a deeper understanding of linear relationships and more complicated functions. Follow the directions at the link to build one, or challenge eighth grade science students to experiment with their own construction methods. You'll be expected to present data in the form of tables and graphs. To insure a fair test, a good To be clear though, for a science fair, it is usually wise to have only one independent variable at a time. Is the effect the same at very low soap concentrations as compared with high concentrations? The controlled variables are stirring each container the same amount and using sugar from the same bag. This time eye color is the dependent variable, so you have to research things that might affect eye color.