science fair project ideas with independent and dependent variablesscience fair project ideas with independent and dependent variables

0000000704 00000 n If you are new to doing science projects and want to know the effect of changing multiple variables, do multiple tests where you focus on one independent variable at a time. Locate an ant hill. Since eye color is an inherited trait, I cannot think of . Air temperature is the independent variable and ant activity is the dependent variable in this ant hill experiment. Prior to this, she wrote curriculum and business papers in four different languages. ). Helmenstine, Anne Marie, Ph.D. "8th Grade Science Fair Project Ideas." - WGU-C950-Project/C964 Computer Science . 9. Completely immerse the gummy bear in the water. Blow Up A Balloon Using Sugar And Yeast. Groups receiving the survey: Teenagers or parents, Amount of time that each person listens to music per day, measured in hours, Ask the question in exactly the same way to each individual. 0000007306 00000 n Get two specimens of the same small plant that can easily be checked on and moved. ThoughtCo. What types of words do babies learn to speak first? The number of dependent variables in an experiment varies, but there can be more than one. Or were there no noticeable changes? Select subjects, half female and half male. How attentive have you been in class these past few weeks? Helmenstine, Anne Marie, Ph.D. "8th Grade Science Fair Project Ideas." 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. Search for jobs related to Science fair project ideas with independent and dependent variables or hire on the world's largest freelancing marketplace with 22m+ jobs. Pour milk into the dish, we made ours about 2cm deep. This is what we are observing and measuring. Planning an investigation Identify the variables. If you have access to a very cold freezer, you can look at the effects of freeze and thaw cycles. And through your studies The Controlled Variables: Do different size seeds have different germination rates or percentages? How to Test Algae Growth for a Science Fair Project, How to Tell the Difference Between Alcohol & Alkene in Labs, Quick & Easy Chemistry Experiments for 10th Graders, Science Experiments on the Formation of Crystals With Ammonia, The Best Ways to Make a Homemade Tornado for a Child's Science Project, Discovery Education: Investigation -- Design Experiment, ScienceProjectIdeasForKids.com: Variables: Independent, Dependent, Controlled, Science Experiments on Evaporation for Kids in Seventh Grade, Science Experiment With Rocks That Absorb Water, Science Experiments on Which Colors of Candles Burn the Fastest. Put the other in an area that gets only indirect sunlight. 1. 8th grade science fair projects tend to involve the scientific method and designing an experiment and not making models or explaining processes. stays aloft the longest? These two variables are: independent variable: Something that you choose to change. 0000003002 00000 n Gatorade and Improved Athletic Performance. In order to succeed in scoring a 4 or 5 on the Science EOG you should c ome to class every day ready to learn and be prepared . The constants (control variables) are the length of the candle, the diameter of the candle, the allowed burn time and the room temperature. Is a classroom noisier when the teacher leaves the room? The fertilizer added to trays C and D is the independent variable. This time eye color is the dependent variable, so you have to research things that might affect eye color. 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. kK^s](8n Chemistry Projects Is the effect the same at very low soap concentrations as compared with high concentrations? Retrieved from https://www.thoughtco.com/8th-grade-science-fair-projects-609030. However, it doesnt get dissolved as the gelatin is insoluble in water. See more ideas about variables, middle school science experiments, scientific method. In this experiment, the controlled variable is the angle of the board and the type of ball you roll. endstream endobj 312 0 obj<>/Size 295/Type/XRef>>stream 0000000016 00000 n The volume of liquid and the material of the penny are both controlled variables in this experiment. For example: Sometimes a variable simply represents an either/or (binary) condition. Copyright 2002-2023 Science Buddies. "; then, during your feeding experiments you changed both the size of the dog and the time of day the dogs were fed. 0000001597 00000 n Did they appear to move faster or slower when warmer? Are all dependent variable(s) measurable? Ideas for Controlled-Variable Science Projects. ", "More stirring might also increase the amount of sugar that dissolves, and different sugars might dissolve in different amounts, so to ensure a fair test I want to keep these variables the same for each cup of water. The company wants to claim that when an athlete drinks Gatorade, their performance will improve. Add a teaspoon of sugar to each and stir the mixture the same number of times in each container. Make similar observations as above for each one of them. An easy way to introduce this idea is . The kids will be enthralled to display their knowledge to the audience in a fun way. Apr 3, 2020 - Explore Owen Koimburi's board "INDEPENDENT AND DEPENDENT VARIABLES" on Pinterest. Plant the same number of small seeds, such as tomatoes. How does the pH of soil relate to the pH of the water around the soil? Look at ethylene and enclosing a fruit in a sealed bag, temperature, light, or nearness to other pieces or fruit. We used a variety of milks in our science fair project below. The second experiment does not require any more data . Who listens to music the most: Teenagers or their parents? The controlled variable must not change during the experiment. If there is a direct link between the two types of variables (independent and dependent) then you may be uncovering a cause and effect relationship. You can turn any science project into a science fair project by finding one factor you can change (the independent variable) and measuring its effect on another factor (the dependent variable). water) then it will increase in mass and volume. Let the bowl sit overnight in a place away from direct sunlight. . Compare your results. <<0F81BB1DD7DE6340B13214396CDE52FD>]>> Why? You will change the temperature of the water, so this is the independent variable. 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. If so, is the lack of color perception compensated by better light/dark vision? Does it matter whether it contains sugar? Experimental Design for Advanced Science Projects. xref Record how quickly each plant grows by measuring its growth rate with a ruler. What solvents (e.g., water, alcohol, vinegar, detergent solution) will remove the ink? Are dogs (cats/fish/etc.) This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched. Water pressure, or how much the water is "pushing", Growth of the plant, measured by its height, Growth of the plant, measured by the number of leaves, Make measurements of growth for each plant at the same time, The motor should be doing the same work for each test (turning the same wheel, propeller, or whatever), Same type of bike and tires (except for the fenders! What type of plastic wrap prevents evaporation the best? 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. 1. The ratios of water to sugar and the amount of stirring are both controlled variables in this experiment. 0000002580 00000 n Sometimes it is impossible to just change one variable, and in those cases, scientists rely on more-complicated mathematical analysis and additional experiments to try to figure out what is going on. Design an investigation using eye color as an independent variable. With different kinds of plants, or inconsistent watering, how well each plant grew might not be a factor of sunlight alone. Controlled variables are quantities that a scientist wants to remain constant, and she or he must observe them as carefully as the dependent variables. As a martial arts and group fitness instructor, she has taught exercise classes in North America, Europe and Asia. Article was last reviewed on 21st November 2015. 0000002075 00000 n colorblind? She has taught science courses at the high school, college, and graduate levels. 0000003270 00000 n Equally long? Let it settle for a moment, this will take more time the higher the fat content. In difficult or simple 8th grade science fair projects, the concentration is kept on including scientific methods and experiment designs. It's appropriate to cite references for any information that isn't common knowledge or that draws on the work of others. Does Water or Vinegar Clean a Penny Better? Please enter a search term in the text box. Science fairs are an excellent way to earn better grades and win college scholarships and grants. Take two dirty pennies and place them in identical shallow containers that can hold liquid. Next day, lift the bear from the water with a plastic fork, sieve or screen. Does light affect the rate at which foods spoil? Do the same types of mold grow on all types of bread? The scientist simply starts the process, then observes and records data at regular intervals. The rate of eye blinking is the dependent variable, because it differs according to the sex of the subjects. Does an electric motor turn faster if you increase the voltage? trailer Did they appear to be slower when colder? Here are several examples of independent and dependent variables in experiments: In a study to determine whether how long a student sleeps affects test scores, the independent variable is the length of time spent sleeping while the dependent variable is the test score. If you did not, then other explanations could be given for differences you observe in how much they eat. How much water flows through a faucet at different openings? The independent and dependent variables are the two key variables in a science experiment. Science Fair Project Ideas for Kids, Middle & High School Students . Helmenstine, Anne Marie, Ph.D. (2021, February 16). 32. The ingredients of gummy bears are sugar, water, and gelatin, with little water content. Here is a sample containing the variables and hypothesis. Remember that independent variables are on the horizontal and dependent variables on the vertical line of graphs. All About Apples-Great list of apple learning and play . After a week, remove the pennies and see which has been cleaned more. Divide the time by five to get the average period for the first trial. The dependent variables must be able to be measured and caused by the independent variable. music? Do White Candles Burn Faster Than Colored Candles, Physical balance or digital weighing machine. Similar to our example, most experiments have more than one controlled variable. Can you use a household water filter to remove flavor or color from other liquids? She has been a radio news journalist and announcer, movie reviewer for Family Movie Reviews Online, chiropractic assistant and medical writer. What plastic wrap prevents oxidation the best? What metal is most resistant to corrosion by sea water? Variables in a Slime Experiment: 1. glue solution type of glue, concentration of the solution. 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. Is the nutritional content of different brands of a vegetable (e.g., canned peas) the same? You should do the project yourself, rather than enlist heavy-duty help from a parent or older student. Log in. startxref . Cookies collect information about your preferences and your devices and are used to make the site work as you expect it to, to understand how you interact with the site, and to show advertisements that are targeted to your interests. 0000001169 00000 n Do all brands of diapers absorb the same amount of liquid? Me and my friend need to complete a project with dependent and independent variables please give ideas QUICK. There are two parts of this hypothesis, and thus two experiments: Experiment #1: Measure the voltage of fresh AA batteries as they are used in different current drain devices. Note where each plant is when you measure it -- outside, inside in a well-lit window or away from direct sunlight -- and conclude which amount of sunlight helps your plants grow the fastest. Measure the dimensions (length, breadth and height) of the bear with a scale. 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. She completed her Master's degree in Nutrition Sciences, also at the University of Georgia. Reproduction of material from this website without written permission is strictly prohibited. Design an investigaton using eye color as a dependent variable. Use a stopwatch to record how long it takes for a teaspoon of sugar to dissolve in each. Does relative humidity? All rights reserved. endstream endobj 296 0 obj<. The subjects used in this experiment were under the color gel, and let the subjects grew. If I use a AA battery in any current-draining device, then the voltage of the battery will drop over time. You may print and distribute up to 200 copies of this document annually, at no charge, for personal and classroom educational use. The controlled variables are stirring each container the same amount and using sugar from the same bag. Place the planks at an angle and roll a tennis or golf ball down each plank simultaneously. On trying out the different ideas, you will find that the degree of expansion of the candy depends on the liquid on which it is kept. How much can you dilute a pesticide while retaining its effectiveness? Independent variables are not affected by the other variables; they are independent of the others. Plant the same number of small seeds, such as tomatoes. The various surfaces on the ramp are the independent variables. Conduct two more trials and average the period for the three trials. Scientists try to figure out how the natural world works.To do this they use experiments to search for cause and effect relationships. In science, a variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled. The speed of the car, measured in distance traveled over a length of time, is the dependent variable. This variable is affected by seed size and other independent variables in the experiment, such as water, light and soil composition. 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. In some experiments, time is what causes the dependent variable to change. D[P6KEBOVs.#}E?mys+(zMHPR.Ll+12*u2+_jFSW94(#VUx>2x+1hI3eP. The independent variable is the one that is changed by the scientist. Learn more: Babble Dabble Do. 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. Independent variable - the variable that is altered during a scientific experiment.. Sometimes you may hear this variable called the "controlled variable" because it is the one that is changed. For example, in the dog experiment example, you would need to control how hungry the dogs are at the start of the experiment, the type of food you are feeding them, and whether the food was a type that they liked. The independent variable is the one that is changed by the scientist. The independent variable must be something measurable that you can change in the experiment. For any other use, please contact Science Buddies. But it doesn't have to be that way. Follow the directions at the link to build one, or challenge eighth grade science students to experiment with their own construction methods. %PDF-1.6 % What type of air freshener makes a school bus smell best to the greatest number of students? Start seedlings, or purchase some that are already a few inches high. Experimental Design for Advanced Science Projects page. Typed reports and posters are the norm (sorry, no handwritten text). She pointed out that this problem might make a good project for the upcoming science fair. Suzy has been a successful health, fitness and nutrition writer for more than 10 years, and has been published in various print and online publications. A Few More Apple Learning Ideas: A magnetic science activity to go along with the book 10 Apples Up on Top. You'll be expected to present data in the form of tables and graphs. 0000003572 00000 n 0000001305 00000 n . The time for germination to take place and the height of the seedlings are dependent variables. . Place a heat source -- like a space heater or a bright incandescent light bulb -- directed to warm the air outside the entrance of the ant hill. Also, a little more on Oxidation with this Rust Experiment! A properly designed experiment usually has three kinds of variables: independent, dependent, and controlled. It is the variable you control. Beverlee Brick began writing professionally in 2009, contributing to various websites. Plant a few large seeds, such as pumpkin seeds. "Different water pressure might also cause different amounts of water to flow and different faucets may behave differently, so to ensure a fair test, I want to keep the water pressure and the faucet the same for each faucet opening that I test. ThoughtCo, Feb. 16, 2021, thoughtco.com/8th-grade-science-fair-projects-609030. Is a seed affected by its size? A science fair project is an opportunity to research and learn about things that interest you. In other words, they . You can make your own wind or water and evaluate the effects on soil. Typed reports and posters are the norm (sorry, no handwritten text). This experiment demonstrates how sunlight affects different kinds of plants, reinforcing the differing needs of different kinds of plant life. 2. borax solution- source of borax, concentration of the solution. The Effect Of Colored Light On Plant Growth Science ProjectIts range is between 380-750 nm approximately. Fenders: The bicycle either has fenders or it does not, For Good Variables, You Should Answer "Yes" to Every Question. All about WGU Capstone Project: Ideas, . 0000006791 00000 n Strauch holds a Master of Arts in speech/broadcast journalism from Bob Jones University, where she also served on the faculty of the radio/TV department. 8th Grade Science Fair Project Ideas. 5th grade. You can find out more about our use, change your default settings, and withdraw your consent at any time with effect for the future by visiting Cookies Settings, which can also be found in the footer of the site. Scientists try to figure out how the natural world works.To do this they use experiments to search for cause and effect relationships. dependent variable: Something that changes in response to changes in the independent variable. 295 0 obj <> endobj Plant a few large seeds, such as pumpkin seeds. Psychology projects make for fun and . Do all hairsprays hold equally well? This version gives the independent variable (If), basic experimental design (and), and the dependent variable (then) in one sentence. However, vinegar, which is actually an acid, can dissolve the candy. Label the unfertilized seedling trays A and B and the fertilized seedling trays C and D. The controlled variables are: same kind of seed, same type of soil, same amount of water from the same source applied at the same frequency, same amount of exposure to the sun, same room temperature and same dew point. The difference between an independent vs. dependent variable is how that they relate to the overall study. For example, the following question identifies what is happening as well several variables which are identified. Learn more about the chemical reaction process with this classic science experiment that only requires the use of sugar, yeast, a balloon, and an empty bottle. Published on November 21st 2015 by Papiya Dutta under Science Fair Projects. Copyright 2022 (SCIENCEPROJECTIDEAS.ORG). Fill two identical containers with two cups of water each -- one hot and one cold. Sit and observe the subjects as they do ordinary tasks, such as writing, reading or talking, and count the number of times the subjects blink in one minute. repeat the same experiment with a di erent variable and obtain the same results B. Does air temperature affect how long soap bubbles last? Cause and effect relationships explain why things happen and allow you to reliably predict the outcomes of an action. They will also be thrilled at the idea that their favorite gummy bears could teach them a lesson or two in science. For example, something might be either present or not present during an experiment. For any other use, please contact Science Buddies. You might have a belief that someone is in love, but you cannot really be sure, and you would probably have friends that do not agree with you. You can. Do different brands/types of markers produce the same results? Can a saturated solution of sodium chloride still dissolve Epsom salts? Even today, the scientific method . Have you identified all relevant dependent variables, and are they all caused by and dependent on the independent variable? Are night insects attracted to lamps because of heat or light? Well, if you changed more than one variable it would be hard to figure out which change is causing what you observe. The dependent variable is the reduction in the candle's length after 30 minutes. Analyze the data to determine if one sex blinks more frequently than the other and which one blinks the most. The Dependent Variable: This is the difference between the two parts of the experiment that happens when the independent variable is changed. 0000007529 00000 n 3. ratio of solutions- Examples are: 1 part glue + 1 part borax; 2 parts glue + 1 part borax; etc. How does the shape of an ice cube affect how quickly it melts? 0000000988 00000 n The dependent variable is the amount of sugar that dissolves in each cup of water. Helpful in u. 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. Can you make Jello using fresh pineapples instead. If you shake up different kinds or brands of soft drinks (e.g., carbonated), will they all spew the same amount? Plant seeds in identical seedling trays, using two trays of unfertilized soil and two seedling trays of fertilized soil, to see which soil helps the seeds germinate faster. https://www.thoughtco.com/8th-grade-science-fair-projects-609030 (accessed March 4, 2023). However, imagine trying to do an experiment where one of the variables is love. Water the seeds equally, and place them where they get equal sunlight so that the only difference between the two is the size of the seeds. How do different factors affect seed germination? Does seed size affect the growth rate or final size of a plant? Does type of hair affect the results? Reproduction in whole or in part without permission is prohibited. Some people refer to controlled variables as "constant variables.".
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