science fair project ideas with independent and dependent variables

The dependent variable is the reduction in the candle's length after 30 minutes. What effect do additives have on the crystals? You may print and distribute up to 200 copies of this document annually, at no charge, for personal and classroom educational use. For example: Sometimes a variable simply represents an either/or (binary) condition. Who listens to music the most: Teenagers or their parents? Grow Your Own Bread Mold - 6th Grade Science Activities - SoD www. Design an investigaton using eye color as a dependent variable. Petri dishes are perfect for this, but a shallow bowl or empty yogurt cup would also work. 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 . Can a saturated solution of sodium chloride still dissolve Epsom salts? 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. Factors that you could test include the intensity, duration, or type of light, the temperature, the amount of water, the presence/absence of certain chemicals, or the presence/absence of soil. Is the effect the same at very low soap concentrations as compared with high concentrations? The independent and dependent variables are the two key variables in a science experiment. 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. In difficult or simple 8th grade science fair projects, the concentration is kept on including scientific methods and experiment designs. Does it matter whether it contains sugar? Equally long? Gummy Bear Experiment - Science Project Ideas 0000001783 00000 n Procedure. It's appropriate to cite references for any information that isn't common knowledge or that draws on the work of others. The controlled variables are stirring each container the same amount and using sugar from the same bag. In our dog example, the dependent variable is how much the dogs eat. Also, check if the taste and/or color of the bears have changed. Dependent variable - the variable being tested or . 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. . For any other use, please contact Science Buddies. endstream endobj 312 0 obj<>/Size 295/Type/XRef>>stream What are Variables? 8th Grade Science Fair Project Ideas. Scientific Method Activity PdfScientific Method: The Roly Poly Helmenstine, Anne Marie, Ph.D. "8th Grade Science Fair Project Ideas." The independent variable is the one that is changed by the scientist. Locate an ant hill. What ratio of vinegar to baking soda produces the best. 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. A sports medicine researcher has been hired by Gatorade to test the effects of its sports drink on athletic performance. Science fairs are an excellent way to earn better grades and win college scholarships and grants. xref The various surfaces on the ramp are the independent variables. Record the dimensions and mass of the bear again. Browse independent and dependent variables science project resources on Teachers Pay Teachers, a marketplace trusted by millions of teachers for original educational resources. 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. 0000007529 00000 n How much water flows through a faucet at different openings? Variables in a Slime Experiment: 1. glue solution type of glue, concentration of the solution. You'll be expected to present data in the form of tables and graphs. You may print and distribute up to 200 copies of this document annually, at no charge, for personal and classroom educational use. Helpful in u. And through your studies You should do the project yourself, rather than enlist heavy-duty help from a parent or older student. You can. Check out this big list of Simple Science Experiments for Kids! 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. Copyright 2002-2023 Science Buddies. Project Idea: Independent vs. Dependent Variables What type of plastic wrap prevents evaporation the best? 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. If so, is the lack of color perception compensated by better light/dark vision? 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. Older students are invited to read more about that in our Pi Day with Apple Pie. stays aloft the longest? The ingredients of gummy bears are sugar, water, and gelatin, with little water content. What solvents (e.g., water, alcohol, vinegar, detergent solution) will remove the ink? You can make your own wind or water and evaluate the effects on soil. In this case, it would be the size of the tomatoes in Tray #1. The rate of eye blinking is the dependent variable, because it differs according to the sex of the subjects. Can you graft a tomato plant onto a potato plant? Or were there no noticeable changes? salt water). 0000000016 00000 n . Have you identified all relevant dependent variables, and are they all caused by and dependent on the independent variable? What types of words do babies learn to speak first? Make similar observations as above for each one of them. Experiment with what rolls faster by covering one of two planks with a smooth lining like shelf paper and thge other with a rough lining like carpet or astroturf. Dependent variables do change according to the other variables; therefore, they are dependent on those variables. 3. ratio of solutions- Examples are: 1 part glue + 1 part borax; 2 parts glue + 1 part borax; etc. 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. Do different brands/types of markers produce the same results? Remember that independent variables are on the horizontal and dependent variables on the vertical line of graphs. Test which brand of gum lasts the longest. 4. thickness of slime- Another term for this would be viscosity, which . Controlled variables are quantities that a scientist wants to remain constant, and she or he must observe them as carefully as the dependent variables. 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. Blow Up A Balloon Using Sugar And Yeast. The scientist simply starts the process, then observes and records data at regular intervals. You should do the project yourself, rather than enlist heavy-duty help from a parent or older student. Are goldfish water chemicals really necessary or are they an unneeded expense? Does Music Have an Effect on Plant Growth | Science Project Ideas Article was last reviewed on 21st November 2015. ThoughtCo. Variables are the parts of the experiment that change, or variate. 0000001658 00000 n NEED HELP WITH SCIENCE PROJECT!!!!!!!! : r/sceince How do different factors affect seed germination? Independent And Dependent Variables MathMathematics In mathematics, the Sometimes you may hear this variable called the "controlled variable" because it is the one that is changed. Fill two identical containers with two cups of water each -- one hot and one cold. She holds master's degrees in French literature and education. 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. Experiments also have controlled variables. Put the other in an area that gets only indirect sunlight. This variable is affected by seed size and other independent variables in the experiment, such as water, light and soil composition. The company wants to claim that when an athlete drinks Gatorade, their performance will improve. The controlled variables in this experiment are the type of plant used and the amount of water received. Follow the directions at the link to build one, or challenge eighth grade science students to experiment with their own construction methods. You could add food coloring, flavorings, or other 'impurities'. 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. Similar to our example, most experiments have more than one controlled variable. 2. Due to the process of osmosis, i.e., the movement of water molecules through a selectively permeable membrane from an area of high concentration to that of a lower concentration, the bear starts to grow. Teacher location: The teacher is either in the room or not in the room. dependent variable: Something that changes in response to changes in the independent variable. As a martial arts and group fitness instructor, she has taught exercise classes in North America, Europe and Asia. What are Variables? - Science Fair Project Ideas, Answers, & Tools This experiment checks whether a particular kind of plant prefers direct or indirect sunlight. 8th Grade Science Fair Project Ideas - ThoughtCo 9 INDEPENDENT AND DEPENDENT VARIABLES ideas | variables, middle school You should be able to use whatever you have in the fridge. In regression analysis, the dependent variable is represented by "y", while the independent variables are represented by "x. colorblind? 0000002580 00000 n 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. "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. This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched. All rights reserved. But it doesn't have to be that way. 0000001169 00000 n NEED HELP WITH SCIENCE PROJECT!!!!!!!! Make a ramp with sides to make sure the car stays on the ramp. Try some easy projects that use three variables to understand the importance of each variable in an experiment. 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. The length of the string and the angle of the swing are controlled variables. To be clear though, for a science fair, it is usually wise to have only one independent variable at a time. The controlled variables are using the same car, using the same ramp at the same angle, and letting go of the car without pushing at the same starting point. Statistics are defined as a field that involves tabulating, depicting, and describing. 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. In our example, the independent variable is the SPF rating and the dependent variable is the level of UV radiation. 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. xbbc`b``3 ` c 9. Science Fair Project Ideas for Kids, Middle & High School Students, Science Buddies: Variables in Your Science Fair Project. Have you identified all relevant controlled variables? For any other use, please contact Science Buddies. Hypertonic refers to a higher concentration of solutes and hypotonic is just the reverse. Why just one? Variables in Science: Independent, Dependent and Controlled! Fill the dish with milk. Scientists try to figure out how the natural world works.To do this they use experiments to search for cause and effect relationships. Do White Candles Burn Faster Than Colored Candles, Physical balance or digital weighing machine. Independent Variable . A variable is something that can change or vary for an experiment to be a success. This video explains independent, dependent, and controlled variables, with a special emphasis on controlling variables in experimental design. You should have 2 different graphs for the data pertaining to plants growing with and without music on the same graph paper for a good comparative study. 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. It is called the "dependent" variable because we are trying to figure out whether its value depends on the value of the independent variable. is the name given for any part of an experiment that changes. 6th Grade Science Fair Projects Air temperature is the independent variable and ant activity is the dependent variable in this ant hill experiment. Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. How does the shape of an ice cube affect how quickly it melts? You will change the temperature of the water, so this is the independent variable. However, it doesnt get dissolved as the gelatin is insoluble in water. 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. 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. 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. 8th grade science fair projects tend to involve the scientific method and designing an experiment and not making models or explaining processes. Hang the string from a dowel rod taped to the top of a cabinet. a variable that does not depend on another variable or other variables for its value. Look at ethylene and enclosing a fruit in a sealed bag, temperature, light, or nearness to other pieces or fruit. Water the seeds equally, and place them where . Can you make Jello using fresh pineapples instead. This plant experiment studies the effects of different types of lighting on plants such as radishes and leaf lettuce. Some of the control variables might be the brand of sunscreen lotion (using the same brand but different SPF ratings), the amount of sunscreen lotion used for each experiment, the type of materials and the type of UV meter used . Published on November 21st 2015 by Papiya Dutta under Science Fair Projects. Does the power of a microwave affect how well it makes popcorn? Do all hairsprays hold equally well? Next day, lift the bear from the water with a plastic fork, sieve or screen. 295 0 obj <> endobj 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. Completely immerse the gummy bear in the water. How close does a plant have to be to a pesticide for it to work? Does seed size affect the growth rate or final size of a plant? How does the pH of soil relate to the pH of the water around the soil? Study the simple transfer of energy with the help of this cool physics science project exploring static energy. Blow out a candle with a balloon. Design an investigation using eye color as an independent variable. Plant the same number of small seeds, such as tomatoes. On the other hand, its mass and volume decrease when placed in a hypertonic solution (e.g. Does fertilizer make a plant grow bigger? PDF a resource for teachers, students and parents - SCDHEC Observe the ants coming and goings and record your findings. Scientific Method Story Worksheet. A dependent variable is the factor, or outcome, that will be measured in an experiment. For your science fair project, you should change one variable to see what affect it has on another variable. Ways to Play with an Apple Carton. The number of seeds that germinate is the dependent variable. Since eye color is an inherited trait, I cannot think of . What is the tallest tower you can build with 100 Legos? Science Fair Project : Scientific Method - Hypothesis Explore Concave and Convex Mirrors STEM Activity. Time how long it takes to swing back and forth five times. Volleyball Machine: 2019 Engineering Challenge. 2. borax solution- source of borax, concentration of the solution. If you have access to a very cold freezer, you can look at the effects of freeze and thaw cycles. The gummy bear experiment is a fun activity that teaches the basic concept of osmosis to the little ones in an easy manner. Plant a few large seeds, such as pumpkin seeds. The . Experiment #2: Compare the rate of voltage change between devices with low, medium, and high current drain. Is a seed affected by its size? Are dogs (cats/fish/etc.) Independent variables are not affected by the other variables; they are independent of the others. She completed her Master's degree in Nutrition Sciences, also at the University of Georgia. This science fair log book is designed for teachers to walk their class through a demonstration science fair project and then have students use that example to . The ramp can be as simple as a board with modeling clay guard rails. 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. She pointed out that this problem might make a good project for the upcoming science fair. What type of air freshener makes a school bus smell best to the greatest number of students? The Effect Of Colored Light On Plant Growth Science ProjectIts range is If you did not, then other explanations could be given for differences you observe in how much they eat. You'll be expected to present data in the form of tables and graphs. This is a fantastic bundle which includes everything you need to know about Understanding Dependent and Independent Variables across 15+ in-depth pages. Also, a little more on Oxidation with this Rust Experiment! Select subjects, half female and half male. Blowing up a balloon with baking soda and vinegar is the classic acids and bases experiment. Teaching About Variables in Science - The Owl Teacher The Dependent Variable: This is the difference between the two parts of the experiment that happens when the independent variable is changed. Let the bowl sit overnight in a place away from direct sunlight. You can look at the percentage of seeds that germinate or the rate at which seeds germinate. Science fair project ideas with independent and dependent variables What effect does soap in water have on plants? 56 Best 8th Grade Science Fair Projects and Experiments - We Are Teachers Does relative humidity? Alternatively, use an artificial light source and completely control the amount of light each group of plants receives. Is a classroom noisier when the teacher leaves the room? Measure the dimensions (length, breadth and height) of the bear with a scale. Do plants react to the presence of other plants? How effective are natural pest deterrents? How does cold storage affect the germination of seeds? Planning an investigation (CCEA) - BBC Bitesize The dependent variable is the amount of sugar that dissolves in each cup of water. Which apps run down a cell phone battery the fastest. Can all controlled variables be held at a steady value during the experiment? Examples of Independent and Dependent Variables. The dependent variables must be able to be measured and caused by the independent variable. Independent and Dependent Variable Examples - ThoughtCo Variables in Your Science Fair Project Variables Scientists use an experiment to search for cause and effect relationships in nature. What conditions affect the ripening of fruit? Wgu Capstone ExamplesThe first half requires you to work with a 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. Do the same types of mold grow on all types of bread? Which soft drink sprays the most liquid after it is shaken? Science Process Skill: Identifying Variables. 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. endstream endobj 296 0 obj<. An easy way to introduce this idea is . The ratios of water to sugar and the amount of stirring are both controlled variables in this experiment. Are night insects attracted to lamps because of heat or light? Place some of the plants outdoors or in a well-lit window. How are different soils affected by erosion? %PDF-1.6 % 15 Independent and Dependent Variable Examples (2023) - Helpful Professor 8th Grade Science Eog 2021EOG_Science_Grades5and8_TestSpecifications The time for germination to take place and the height of the seedlings are dependent variables. 0000007306 00000 n Independent and Dependent Variables Examples - Science Notes and Projects The constants (control variables) are the length of the candle, the diameter of the candle, the allowed burn time and the room temperature. The varying weights are the independent variable, while the number of swings, or periods, is the dependent variable. Plant the same number of small seeds, such as tomatoes. Gatorade and Improved Athletic Performance. of days as the independent variable on a graph paper and the average plant height as the dependent 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. A variable is something that can change. It is the variable you control. The dependent variable is the amount of sugar that dissolves in each cup of water.