Explain what is happening in the experiment in relation to relevant theory. 80cm. The dependent variable is the _____. Then have Person #3 and Person #4 test their balls. The first independent variable that will be tested. A student is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. Ramp and ball, controlled study lab report. Independent Variable: Heights from which the ball is dropped . An explanation for why each experimental step is important. Drop (do not throw) the ball from a carefully measured height using the meter stick. Surface on which the ball bounces - This is because different balls have different degrees of hardness and therefore different hardness of floors will cause different absorption of energy when the . This variable stays the same throughout the whole experiment, Responds to the changing variable in an experiment, This is the changing variable in an experiment, This is a scientific procedure used to make a discovery Ask a question 2. This experiment requires a ball that will bounce and a meter stick or other measuring device. Our observations during this experiment was.. Data Table: group. the average bounce height for each ball inthe experiment. The controlled variables in this experiment were: The 2 balls used were of the same size, material and thickness, each test was done in the same location so the ball was exposed to the same environmental factors and bounced on the same surface, the ball was dropped from the same . Repeat the experiment with Person #2 dropping their ball. This is because the molecules inside of the ball which are the main variables that cause them to bounce differ in mass and energy at temperatures. Few independent variables will be changed, so the investigation is easy to manage, and the data is easier to process. Elaboration: Try using different size balls. Determine how high the ball rebounds on its first bounce. In my experiment the balls maximum speed is rather small, and the height distance is small too, and I assume air resistance is negligible . One factor that can influence the bounce of a ball is the temperature of the ball. Science Fair Project: Pressure and a Bouncing Ball. 100cm. Method: To set up the experiment, two meter sticks were taped on top of one . 6.Graph your data on the bar graph by first writing in the different names ofthe ball types on the lines at the bottom. Round theaverageto thenearest whole number. At the end of the experiment, everyone should use their calculators and figure the average bounce height for each ball in the experiment. Draw a conclusion It is important to note that the scientific method is not the only way to conduct an experiment. Dependent Variable: Percent rebound of the bouncy ball . Note: This is one group set up. Controlled Variables: Bouncy ball used, surface bounced off of, technique in which ball was dropped (initial height was measured from base of ball). Make sure the IPad is still ready to record and press record. This is an experiment to investigate bouncing balls and how they behave in different situations. Place one of the tennis balls in the freezer for 20 mins. Prior to the sample task, students investigated investigated forms of energy and energy transfers and transformations. The sources of energy input for this experiment are gravitational potential energy and heat energy. . Place the tape measurer against the edge of a wall using the bluetack. This investigation is exploring the relationship between the independent variable drop height and the dependent variable bounce height. introduces students to two key concepts of physical science-that solids and liquids are . 1. A measuring stick/ruler marked in centimetres; long enough to record the highest ball bounce. 4. Gravitation potential energy because the ball is above the ground, and heat energy because of the human touching the ball transfers their body heat to the ball. In this case, the class was learning about energy transfers, transformations, and types of energy forms. The ground then returns that force, causing the ball to bounce. They identify variables to be changed, measured and controlled. The air or gas inside the tennis ball expands when the ball is thrown onto the ground. Repeat the experiment with Person #2 dropping their ball. Be sure to perform 3 trials, and allow time for team members to record the data. As you design this experiment, be sure to pay attention to the independent variable (the variable that you change in the experiment), the dependent variables (the variable that is affected by changing the independent variable), and any control variables (variables that you want to keep constant so they don't affect the results of your experiment). 5. 40 50 60 70 80 90 10 20 30 10 20 x 40 50 60 70 80 90 10 20 30 10 20 y 40 50 60 70 80 90 10 20 30 10 20 . Remember each students should have a job Recorder, materials gatherer, director, experimentor, etc. table tennis ball, golf ball, squash ball, solid rubber ball (similar sizes) solid rubber balls in different sizes (similar materials) old and new tennis balls (different surface textures/ages). The ground then returns that force, causing the ball to bounce. 4. Repeat this test from 2 ft, 3 ft, and 1/2 ft. Do this test for each ball and record data. When the ball is dropped from the height of 2. Materials:-Carbon Paper-Goggles-Golf Balls-Graph Paper-Lab Report . 60cm. 44cm. 69cm. Bouncing balls react to sounds from the microphone. In this case the bounce height of the tennis ball depends on the height from which it is dropped. When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and . Round the . Drop Height - The initial height the tennis ball drops Dependant Variables . In a hollow ball, the change in temperature causes a change in air pressure within the ball. Go over the vocabulary used in . The controlled variables in this experiment were: The 2 balls used were of the same size, material and thickness, each test was done in the same location so the ball was exposed to the same environmental factors and bounced on the same surface, the ball was dropped from the same height each time with no added force pushing it down, and the . To be consistent, again measure to the bottom of the ball. Do research/Use what you know 3. Method: 1. The tennis ball is the constant variable factor (the variable that is To reduce . for the experiment (a tennis ball, racquetball, superball, etc.). The colder, the lower the ball bounces, and vice versa. Round the . 2. The controlled variables in this experiment were: The 2 balls used were of the same size, material and thickness, each test was done in the same location so the ball was exposed to the same environmental factors and bounced on the same surface, the ball was dropped from the same . PDF. Summary of task. 40cm. Now work out the efficiency of the ping pong ball by dividing the average rebound height of the ping pong ball by the initial drop height (90cm), then times this by 100%. 60cm. The coefficient of restitution can thus be used to compare how well different balls bounce. Things that are kept the same to ensure experiment results are due to the independent variable and not external factors are called: The variable the is changed on purpose to see its effects on something is called: The variable that is being tested, counted, or measured is known as. Physics & Physical Science Demos, Labs,. To increase accuracy, you may repeat each test three times and divide by 3 to find an average. 4 - A well designed experiment using a scientific method with an independent variable, a dependent variable and controls for all other variables. Bouncing Polymer Ball! This investigation is exploring the relationship between the independent variable drop height and the dependent variable bounce height. BOUNCING BALL EXPERIMENT Materials: Cooperative Groups of 3---2 meter sticks, 1 tennis ball, 1 super ball, strip of masking tape, 1 additional sheet of graph paper. 115cm . Students construct representations of their data to reveal and analyse patterns and trends, and use these when justifying . Check with your teammates to besure that you all have the same results. 10cm. Identify the independent variable. Number 1- Tape the meter stick to the wall or any stable vertical surface with 0 cm at the bottom. At the end of the experiment, everyone should use their calculators and figure the average bounce height for each ball in the experiment. The temperature of a tennis ball greatly affects how high it bounces. Dependent: - Height at which the tennis ball bounces. 1. Variables. 4. Design and conduct an experiment 5. In the heat, the molecules are more active, so the ball can bounce higher . - Height at which the ball is dropped. Students of all ages participate in science fairs; they also play with balls: basketballs, footballs, baseballs, soccer balls. To see more on this, visit Writing better introductions 3. Record this answer in your assignment book under the efficiency for the ping pong ball. $4.00. This variable stays the same throughout the whole experiment, Responds to the changing variable in an experiment, This is the changing variable in an experiment, This is a scientific procedure used to make a discovery Bouncing balls. . Record, organize, and analyze data 6. A similar length stick, marked in 5-10cm bands of . Four Experimental Assumptions (1) The evidence for exponential decay has already been discussed and it is a reasonable . Drop a ball from 1 foot off of the floor, slightly in front of a yardstick. Be sure to perform 3 trials, and allow time for team members to record the data. Independent: - Type of surface the tennis ball is dropped on. Place the video camera on a level that will be able to clearly record the experiment, whilst a person sits beside the tape measurer. In experiments the independent variable is changed to see what effect the changes have on the dependent variable. In this case the bounce height of the tennis ball depends on the height from which it is dropped. A controlled variable was that the bouncing stays more or less along the vertical. 1. Controlled: - Same ball. Drop the ball to the floor and record the height the ball reaches on its first bounce. Q. Bouncing Ball Lab Name _____ . Identify The Sources Of Energy Input For This Experiment. 85cm. Measure the height the ball reaches after the first bounce and record. Students will explore changing states of matter as liquids magically transform into a solid bouncing ball right before their eyes! Q. Uses proper critical vocabulary in response . In experiments the independent variable is changed to see what effect the changes have on the dependent variable. 39. The controlled variables in this experiment were: The 2 balls used were of the same size, material and thickness, each test was done in the same location so the ball was exposed to the same environmental factors and bounced on the same surface, the ball was dropped from the same height each time with no added force pushing it down, and the bounce height measurements were taken from the same . Materials: Golf ball Ping Pong ball Tennis ball 100cm ruler Sticky tape Variables: Independent variable: the balls tested, the heights the ball are dropped from Dependent variable: the bounce back height Controlled variable: ruler, sticky tape, environment Method: 1. We believe that the number of bounces of the ball will increase as the height of the ball drop decreases. It includes six steps. The experiment will investigate the bounce efficiency of a tennis ball when dropped from different heights. Independent, Dependent and controlled variables. 1. Procedures Step 1 - Drop the ball from a certain height Step 2 - Count the number of bounces Step 3 - Record Step 4 - Repeat from different height Bouncing Ball Experiment Show full text (2) pages for stu. This allowed us to vary t up while . Therefore, the ball will bounce higher. Get ready to WOW your students with this simple yet highly engaging science experiment. Our dependent variable was. we graph the independent variable on the horizontal axis and the dependent 20cm. Then have Person #3 and Person #4 test their balls. and any variables you must control for you experiment. A warmer ball will bounce higher than a cold one. - Amount of force applied. Measure from the bottom of the ball. Sample projects and experiments that can be turned easily into successful science fair projects Science Fair Projects - How To. . The distance in centimeters from bounce 1 to bounce 2. 2. The dual purpose of Experiment 1 was to identify the control mode of rhythmic bouncing and to test the information (t up or h p) used to control racket period.To dissociate these variables, the normal physical relation between the ball's launch velocity, flight duration, and peak height was altered by perturbing v b and g at impact for one-half cycle. The reason for this is twofold. 2. Form a hypothesis 4. Procedure: 1. Rebound height - Maximum height of first bounce Controlled Variables . Then color abar to match the average height ofeach . 5.
