science fair project ideas with independent and dependent variables

endstream endobj 296 0 obj<. 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. The dependent variable is the amount of sugar that dissolves in each cup of water. Does the color of a crayon affect how long of a line it will write? colorblind? 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. You could add food coloring, flavorings, or other 'impurities'. How are different soils affected by erosion? A fifth grade science project is the culmination of the elementary school curriculum. Science Fair Project Ideas for Kids, Middle & High School Students, Science Buddies: Variables in Your Science Fair Project. 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. How close does a plant have to be to a pesticide for it to work? If you did not, then other explanations could be given for differences you observe in how much they eat. 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). 4. thickness of slime- Another term for this would be viscosity, which . Select subjects, half female and half male. Blow Up A Balloon Using Sugar And Yeast. Does seed size affect the growth rate or final size of a plant? This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched. Test which brand of gum lasts the longest. Beverlee Brick began writing professionally in 2009, contributing to various websites. Does Water or Vinegar Clean a Penny Better? How does cold storage affect the germination of seeds? Ways to Play with an Apple Carton. Can you make Jello using fresh pineapples instead. The gummy bear experiment is a fun activity that teaches the basic concept of osmosis to the little ones in an easy manner. When conducting experiments, you need to properly note variables to make accurate conclusions. You should be able to use whatever you have in the fridge. Explore Concave and Convex Mirrors STEM Activity. Observe which ball reaches the ground first. One swing is called a period. This variable is affected by seed size and other independent variables in the experiment, such as water, light and soil composition. You want to know which brand of fertilizer is best for your plants. ", "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.". Or were there no noticeable changes? Scientific Methods [edit . In most cases, the ball will move fastest on the smooth surface, demonstrating the effect of friction on an object's acceleration. However, imagine trying to do an experiment where one of the variables is love. As a martial arts and group fitness instructor, she has taught exercise classes in North America, Europe and Asia. Understanding the definition and different types of variables is vital to properly conducting any science experiment. This simple trick can prove to be a cool science fair idea. All rights reserved. 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. 0000003038 00000 n On the other hand, its mass and volume decrease when placed in a hypertonic solution (e.g. The ratios of water to sugar and the amount of stirring are both controlled variables in this experiment. Compare your results. A science fair project is an opportunity to research and learn about things that interest you. 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 example, something might be either present or not present during an experiment. When sugar dissolves in water, you cannot see any sugar crystals floating in the water or settling on the bottom of the cup when you stop stirring; you'll use these visual indicators to compare how much has dissolved in each cup. Helmenstine, Anne Marie, Ph.D. "8th Grade Science Fair Project Ideas." 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. Are all dependent variable(s) measurable? Can you change the independent variable during the experiment? Prior to this, she wrote curriculum and business papers in four different languages. Blow out a candle with a balloon. The controlled variables are stirring each container the same amount and using sugar from the same bag. Dependent variable - the variable being tested or . These factors that change in a scientific experiment are variables. Even today, the scientific method . The scientist simply starts the process, then observes and records data at regular intervals. 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. dependent variable: Something that changes in response to changes in the independent variable. Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. Water both plants the same measured amount and see which grows better. Does air temperature affect how long soap bubbles last? Is the effect the same at very low soap concentrations as compared with high concentrations? An easy way to introduce this idea is . Plant a few large seeds, such as pumpkin seeds. 0000001783 00000 n The ingredients of gummy bears are sugar, water, and gelatin, with little water content. Locate an ant hill. Is a classroom noisier when the teacher leaves the room? The various surfaces on the ramp are the independent variables. 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. A sports medicine researcher has been hired by Gatorade to test the effects of its sports drink on athletic performance. <<0F81BB1DD7DE6340B13214396CDE52FD>]>> Does fertilizer make a plant grow bigger? Remember that independent variables are on the horizontal and dependent variables on the vertical line of graphs. While a study can use dependent or independent analyses to gather as much data as possible, both variables are important because they can impact the . How does the pH of soil relate to the pH of the water around the soil? - WGU-C950-Project/C964 Computer Science . You'll be expected to present data in the form of tables and graphs. Look at ethylene and enclosing a fruit in a sealed bag, temperature, light, or nearness to other pieces or fruit. 7 Best Dependent and Independent Variables ideas. The rate of eye blinking is the dependent variable, because it differs according to the sex of the subjects. 0000006791 00000 n repeat the same experiment with a di erent variable and obtain the same results B. What is the tallest tower you can build with 100 Legos? 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. 32. How attentive have you been in class these past few weeks? Fill the bowl with water. Psychology projects make for fun and . The controlled variables are stirring each container the same amount and using sugar from the same bag. Air temperature is the independent variable and ant activity is the dependent variable in this ant hill experiment. Dependent variables do change according to the other variables; therefore, they are dependent on those variables. trailer Here is a sample containing the variables and hypothesis. Next day, lift the bear from the water with a plastic fork, sieve or screen. Science Process Skill: Identifying Variables. This is an EOG test for 8th-grade science designed to refresh your memory. 0000003270 00000 n Start seedlings, or purchase some that are already a few inches high. A Few More Apple Learning Ideas: A magnetic science activity to go along with the book 10 Apples Up on Top. The length of the string and the angle of the swing are controlled variables. Light is the independent variable, and the dependent variable is plant growth in this classroom experiment. Can all controlled variables be held at a steady value during the experiment? What type of plastic wrap prevents evaporation the best? Copyright 2002-2023 Science Buddies. Fenders: The bicycle either has fenders or it does not, For Good Variables, You Should Answer "Yes" to Every Question. Alternatively, use an artificial light source and completely control the amount of light each group of plants receives. The number of dependent variables in an experiment varies, but there can be more than one. Place some of the plants outdoors or in a well-lit window. In science, a variable is any factor, trait, or condition that can exist in differing amounts or types. She has been a radio news journalist and announcer, movie reviewer for Family Movie Reviews Online, chiropractic assistant and medical writer. 0000001169 00000 n Document the percentage of large and small seeds that germinate. If I use a AA battery in any current-draining device, then the voltage of the battery will drop over time. 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 magnetism affect the growth of plants? The independent variable is the one that is changed by the scientist. Variables are the parts of the experiment that change, or variate. 0000002075 00000 n kK^s](8n She pointed out that this problem might make a good project for the upcoming science fair. wind?)? Some people refer to controlled variables as "constant variables.". How effective are natural pest deterrents? 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). Do plants react to the presence of other plants? Examples of Independent and Dependent Variables. Are dogs (cats/fish/etc.) This is determined by measuring the height of the candle before and after allowing it to burn for 30 minutes. What effect does soap in water have on plants? 0000001597 00000 n What ratio of vinegar to baking soda produces the best. Did they appear to be slower when colder? NEED HELP WITH SCIENCE PROJECT!!!!!!!! Fill the dish with milk. salt water). Are night insects attracted to lamps because of heat or light? Controlled variables ensure that the different elements of an experiment are similar enough that you know what is being changed or tested. You can. 0000000016 00000 n water) then it will increase in mass and volume. of days as the independent variable on a graph paper and the average plant height as the dependent variable. 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. 5th grade. Either predict what you expect to happen or form a hypothesis, record the data, determine whether it upholds the prediction, and report your findings. 0000000704 00000 n Variables in a Slime Experiment: 1. glue solution type of glue, concentration of the solution. Record how quickly each plant grows by measuring its growth rate with a ruler. She completed her Master's degree in Nutrition Sciences, also at the University of Georgia. Water faucet opening (closed, half open, fully open), Amount of water flowing, measured in liters per minute. If you have access to a very cold freezer, you can look at the effects of freeze and thaw cycles. Each has an important role to play in experiments. A dependent variable is the factor, or outcome, that will be measured in an experiment. Cover the penny in one container with 1/8 cup of water, and the other with 1/8 cup of vinegar. The . 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. 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.

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