ThoughtCo, Feb. 16, 2021, thoughtco.com/8th-grade-science-fair-projects-609030. ). A sports medicine researcher has been hired by Gatorade to test the effects of its sports drink on athletic performance. How much water flows through a faucet at different openings? 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. This time eye color is the dependent variable, so you have to research things that might affect eye color. 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). Does an electric motor turn faster if you increase the voltage? Place some of the plants outdoors or in a well-lit window. Why? 0000002075 00000 n Procedure. Document the percentage of large and small seeds that germinate. Article was last reviewed on 21st November 2015. xbbc`b``3 ` c 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. Grow Your Own Bread Mold - 6th Grade Science Activities - SoD www. . In most cases, the sugar will dissolve in the warm water faster, demonstrating that warm mediums -- in which the molecules are moving faster -- dissolve a solid faster than cold mediums. ThoughtCo. 0000003495 00000 n 295 0 obj <> endobj The concept of variables in a science experiment can be confusing for fifth graders. This is an EOG test for 8th-grade science designed to refresh your memory. In regression analysis, the dependent variable is represented by "y", while the independent variables are represented by "x. 0000001169 00000 n The scientist simply starts the process, then observes and records data at regular intervals. How much can you dilute a pesticide while retaining its effectiveness? You will change the temperature of the water, so this is the independent variable. Do plants react to the presence of other plants? Time how long it takes to swing back and forth five times. https://www.thoughtco.com/8th-grade-science-fair-projects-609030 (accessed March 4, 2023). All rights reserved. Does seed size affect the growth rate or final size of a plant? 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 . Is the effect the same at very low soap concentrations as compared with high concentrations? Does the power of a microwave affect how well it makes popcorn? The ratios of water to sugar and the amount of stirring are both controlled variables in this experiment. Gatorade and Improved Athletic Performance. On the other hand, its mass and volume decrease when placed in a hypertonic solution (e.g. 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. 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. 0000007529 00000 n wind?)? Science fair project ideas with independent and dependent variables ile ilikili ileri arayn ya da 21 milyondan fazla i ieriiyle dnyann en byk serbest alma pazarnda ie alm yapn. How does cold storage affect the germination of seeds? After a week, remove the pennies and see which has been cleaned more. What conditions affect the ripening of fruit? Log in. Each has an important role to play in experiments. To insure a fair test, a good Are night insects attracted to lamps because of heat or light? The second experiment does not require any more data . Draw conclusions about how heat effected the ants movements. Similar to our example, most experiments have more than one controlled variable. different colored light? Can you make Jello using fresh pineapples instead. What type of plastic wrap prevents evaporation the best? Analyze the data to determine if one sex blinks more frequently than the other and which one blinks the most. If you have access to a very cold freezer, you can look at the effects of freeze and thaw cycles. Does air temperature affect how long soap bubbles last? Do different brands/types of markers produce the same results? Statistics are defined as a field that involves tabulating, depicting, and describing. How do different factors affect seed germination? Put one in an area that receives lots of direct sunlight. This is determined by measuring the height of the candle before and after allowing it to burn for 30 minutes. Can you change the independent variable during the experiment? 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. Test which brand of gum lasts the longest. Did they appear to move faster or slower when warmer? The number of seeds that germinate is the dependent variable. How permanent are permanent markers? Water the seeds equally, and place them where . 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. "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. Record the dimensions and mass of the bear again. 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! In this experiment, you'll determine the percentage of large and small seeds that germinate. This experiment checks whether a particular kind of plant prefers direct or indirect sunlight. When printing this document, you may NOT modify it in any way. Kaydolmak ve ilere teklif vermek cretsizdir. Do the same observation each day for a couple of days more. Temperature of the water measured in degrees Celsius, Amount of sugar that dissolves completely, measured in grams. She has taught science courses at the high school, college, and graduate levels. Science Process Skill: Identifying Variables. Plot a graph with the time in hours along the X-axis (the dependent variable) and the mass or weight of the gummy bear along the Y-axis (independent variable). Helmenstine, Anne Marie, Ph.D. (2021, February 16). The Controlled Variables: QGT1 Business Management Capstone Financial Document Balance Sheet Forecast . Get two specimens of the same small plant that can easily be checked on and moved. Controlled variables ensure that the different elements of an experiment are similar enough that you know what is being changed or tested. How do differences in surfaces affect the adhesion of tape? 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. Blowing up a balloon with baking soda and vinegar is the classic acids and bases experiment. Observe which ball reaches the ground first. Follow the directions at the link to build one, or challenge eighth grade science students to experiment with their own construction methods. All rights reserved. Science fairs are an excellent way to earn better grades and win college scholarships and grants. Does the color of a crayon affect how long of a line it will write? 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. What metal is most resistant to corrosion by sea water? The volume of liquid and the material of the penny are both controlled variables in this experiment. Psychology projects make for fun and . The subjects used in this experiment were under the color gel, and let the subjects grew. Reproduction in whole or in part without permission is prohibited. Place the others across the room from the window. Log in. Does relative humidity? Cover the penny in one container with 1/8 cup of water, and the other with 1/8 cup of vinegar. It is called the "dependent" variable because we are trying to figure out whether its value depends on the value of the independent variable. 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. Fill the dish with milk. This experiment is especially good for teaching the concept of a controlled variable if you include a third variable -- how dirty the pennies are. In the best experiments, the scientist must be able to measure the values for each variable. Cause and effect relationships explain why things happen and allow you to reliably . She has been a radio news journalist and announcer, movie reviewer for Family Movie Reviews Online, chiropractic assistant and medical writer. In this experiment, the controlled variable is the angle of the board and the type of ball you roll. Me and my friend need to complete a project with dependent and independent variables please give ideas QUICK. 1. However, imagine trying to do an experiment where one of the variables is love. Variables in a Slime Experiment: 1. glue solution type of glue, concentration of the solution. All rights reserved. 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 variable is something that can change. salt water). Can a saturated solution of sodium chloride still dissolve Epsom salts? How are different soils affected by erosion? Check out this amazing collection of free psychology science fair projects, psychology experiment ideas, and sociology project ideas for kids. This plant experiment studies the effects of different types of lighting on plants such as radishes and leaf lettuce. 3. ratio of solutions- Examples are: 1 part glue + 1 part borax; 2 parts glue + 1 part borax; etc. Plant a few large seeds, such as pumpkin seeds. Even today, the scientific method . Please enter a search term in the text box. 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. Does magnetism affect the growth of plants? Reproduction of material from this website without written permission is strictly prohibited. The kids will be enthralled to display their knowledge to the audience in a fun way. Copyright 2022 (SCIENCEPROJECTIDEAS.ORG). Apr 3, 2020 - Explore Owen Koimburi's board "INDEPENDENT AND DEPENDENT VARIABLES" on Pinterest. Hang the string from a dowel rod taped to the top of a cabinet. Use a stopwatch to record how long it takes for a teaspoon of sugar to dissolve in each. The independent variable is the one that is changed by the scientist. One swing is called a period. Experiment #2: Compare the rate of voltage change between devices with low, medium, and high current drain. Plant the same number of small seeds, such as tomatoes. Which apps run down a cell phone battery the fastest. In science, a variable is any factor, trait, or condition that can exist in differing amounts or types. A dependent variable is the factor, or outcome, that will be measured in an experiment. 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. When a scientist performs a test or survey on different groups of people or things, those groups define the independent variable. 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. You could add food coloring, flavorings, or other 'impurities'. Browse independent and dependent variables science project resources on Teachers Pay Teachers, a marketplace trusted by millions of teachers for original educational resources. Look at ethylene and enclosing a fruit in a sealed bag, temperature, light, or nearness to other pieces or fruit. Weight or mass is an example of a variable that is very easy to measure. If I perform this test in low, medium, and high current drain devices, then the rate of voltage drop will be slowest in the low current drain device and fastest in the high current drain device. Repeat the procedure with two weights and three weights. The constants (control variables) are the length of the candle, the diameter of the candle, the allowed burn time and the room temperature. The . Measure the dimensions (length, breadth and height) of the bear with a scale. Remove the heat source and record the ants activity again. Completely immerse the gummy bear in the water. Remember that independent variables are on the horizontal and dependent variables on the vertical line of graphs. Measure its mass with the balance. 0 NEED HELP WITH SCIENCE PROJECT!!!!!!!! Next day, lift the bear from the water with a plastic fork, sieve or screen. We used a variety of milks in our science fair project below. Do all brands of diapers absorb the same amount of liquid? The various surfaces on the ramp are the independent variables. Well, if you changed more than one variable it would be hard to figure out which change is causing what you observe. She completed her Master's degree in Nutrition Sciences, also at the University of Georgia. Do White Candles Burn Faster Than Colored Candles, Physical balance or digital weighing machine. The dependent variable is the amount of sugar that dissolves in each cup of water. An easy way to introduce this idea is . 0000007306 00000 n Measure the dimensions (length, breadth and height) of the bear with a scale. The independent variable is the one that is changed by the scientist. ", "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. When conducting experiments, you need to properly note variables to make accurate conclusions. What paper airplane design flies the farthest? Water faucet opening (closed, half open, fully open), Amount of water flowing, measured in liters per minute. Can all controlled variables be held at a steady value during the experiment? However, it doesnt get dissolved as the gelatin is insoluble in water. Air temperature is the independent variable and ant activity is the dependent variable in this ant hill experiment. 2. borax solution- source of borax, concentration of the solution. The controlled variables are stirring each container the same amount and using sugar from the same bag. What effect does soap in water have on plants? This version gives the independent variable (If), basic experimental design (and), and the dependent variable (then) in one sentence. 1. Water both plants the same measured amount and see which grows better. The time for germination to take place and the height of the seedlings are dependent variables. kK^s](8n 0000001783 00000 n When a gummy bear is placed in a hypotonic solution (e.g. 2. Experimental Design for Advanced Science Projects page. 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. is the name given for any part of an experiment that changes. All about WGU Capstone Project: Ideas, . The dependent variable is the amount of sugar that dissolves in each cup of water. She holds master's degrees in French literature and education. Learn more: Babble Dabble Do. They will also be thrilled at the idea that their favorite gummy bears could teach them a lesson or two in science. You can make your own wind or water and evaluate the effects on soil. 0000003572 00000 n 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. water) then it will increase in mass and volume. trailer Annette Strauch has been a writer for more than 30 years. Also, check if the taste and/or color of the bears have changed. For any other use, please contact Science Buddies. What effect do additives have on the crystals? endstream endobj 296 0 obj<. For instance, maybe the little dog eats more because it is hungrier that day, maybe the big dog does not like the dog food offered, or maybe all dogs will eat more wet dog food than dry dog food. 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. Take two dirty pennies and place them in identical shallow containers that can hold liquid. Record how quickly each plant grows by measuring its growth rate with a ruler. Helmenstine, Anne Marie, Ph.D. "8th Grade Science Fair Project Ideas." a variable that does not depend on another variable or other variables for its value. Is the nutritional content of different brands of a vegetable (e.g., canned peas) the same? So, love is not measurable in a scientific sense; therefore, it would be a poor variable to use in an experiment. Scientific Method Story Worksheet. 1. ", "The many variables above can each change how fast a plant grows, so to ensure a fair test of the fertilizer, each of them must be kept the same for every pot. Fill the bowl with water. What soils best support structures, such as buildings? You should do the project yourself, rather than enlist heavy-duty help from a parent or older student. Understanding the definition and different types of variables is vital to properly conducting any science experiment. 0000003038 00000 n What factors influence the effectiveness of a pesticide (rain? Does light affect the rate at which foods spoil? The ingredients of gummy bears are sugar, water, and gelatin, with little water content. However, vinegar, which is actually an acid, can dissolve the candy. Blow out a candle with a balloon. What types of words do babies learn to speak first? It's free to sign up and bid on jobs. This simple trick can prove to be a cool science fair idea.