Worksheet- introduction to specific heat capacities heating substances in the sun: the following table shows the temperature after 100 g of 4 different substances have been in direct sunlight for up to 60 minutes. Surface area and therefore has the fastest reaction rate this is why a catalyst is often used in the form of a powder in the reaction between calcium carbonate. Variables: the independent variable is the concentration fo sucrose in the beakers, whereas the dependent variable is the mass of the potatoes data: percent change in potato cylinder mass graph of %change in potato cores vs sucrose molarity, the point where line crosses the x-axis is the molar concentration of sucrose with a water potential.
This investigation would expect to have 3 different variables, independent, which you can change, the thing that i will be changing in this investigation for the factors affecting osmosis, is the concentrations of the solution that changes the mass and investigate osmosis with potato tissues. Learn the factors that affect the rate sion to molecular mass and medium 4 investigate the process of osmosis diffusion and osmosis page 40. The effect of surface texture is an outstanding science fair project it carefully controls the variables (the things that change in the experiment) by only changing one thing at a time the starting point is always the same. The initial mass of each potato cylinder was taken before placing in the solution i placed the potatoes in the appropriate labeled beaker (1-6) of each solution and let them sit there for 30 minutes.
The basics of heat cooking, ultimately, is about heat, how heat enters the food and what happens to the food when it enters this article focuses on heat transfer in cooking, or how heat is applied to and enters food. Analysis: the results were reached by taking the change in mass divided by the initial mass which differs with all the other results which suggests that the water molecules had travelled from the salt solution or distilled water (the outside of the cell membrane) and into the potato piece (the inside of the cell membrane) we had taken the. Kinetics is the study of the speed of a chemical reaction some chemical reactions are fast others are slow sometimes chemists want to speed the slow ones up and slow the fast ones down there are several factors that affect the speed of a reaction: if you want to produce as much of a product as. Transpiration and respiration of fruits and vegetables 1bryan r becker, phd, pe and brian a fricke abstract transpiration is the process by which fresh fruits and vegetables lose moisture.
Make your best guess about what will happen when you make your own ramps, and which ramp will allow your car to go the fastest test your hypothesis by doing an experiment follow these steps to create an experiment to test your hypothesis. Potato market grade was determined using usda grading standards (us department of agriculture, 1983) and specific gravity on a representative sample by the weight-in-air minus. Science experiments questions including can you be a human battery cell while in the swimming pool and measure of force of gravity acting on an object go science math history literature. To use our web app, go to kidseducationcom in the web browser (you can bookmark this url for future access) or download our app guided lessons by educationcom on your device's app store.
Diffusion lab report 1 luke wangoctober 27, 2009mr fergusonbiology 9 3b diffusion lab reportquestion how will the temperature of the water affect the rate of diffusionhypothesis if the water temperature is higher, then the rate of diffusion will increase, and vice versavariables independent variable water temperature dependent variable rate of diffusion controlled variables amount of water. Using the values of mass 1 = 1207 kg and mass 2 = 0145 kg, i get an acceleration of 105 m/s 2 this is pretty close to the experimental value (seen above) at 1109 m/s 2 i'm happy. Pearson, as an active contributor to the biology learning community, is pleased to provide free access to the classic edition of the biology place to all educators and their students.
There are so many factors involved that it is difficult to explain why the solubility of one substance is affected more than another by an increase in temperature ask students: the demonstration showed that temperature affects the dissolving of sugar more than it affects the dissolving of salt. Introduction in acid-base chemical reactions, there are four main variables, which influence the rate of reaction these include the presence or absence of catalyst, temperature, concentration, and surface area of reactants. The cell wall to produce an increase in pressure this pressure, which counteracts the diffusion of water into the cell, is called turgor pressure diffusion and.
Increase the force or decrease the mass (newton's second law) number of variables to consider - weight of the car - placement of the mousetrap. The one in the regular water looks like a nice white freshly cut piece of potato moving on to the flexible test, the regular water one again feels firm and crisp (try to break the piece, it snaps) the salt water potato is bendy and doesn't snap at all.
The potato strip put in water, had an increase in both mass and volume, once again due to osmosis and the water moving to a region with a higher concentration, the water, to the potato, a region with a lower concentration. Weight or mass is an example of a variable that is very easy to measure however, imagine trying to do an experiment where one of the variables is love there is no such thing as a love-meter. Diffusion and osmosis laboratory investigations determine mass of all 5 potato cylinders together analysis of results 1 if the potato is allowed to. (day #2) 8 remove the potato/carrot from the salt solution do not stab or poke the potato/carrot with forceps when removing it using a paper towel, pat the.