Temperature Break Lab

The aim of the experiment was to find out how changing the mass effects the rise of the temperature of water.

This lab was conducted with the purpose of confirming the trait of homeostasis among goldfish. During the experiment, it was recorded that the fish would increase gill movement when placed in colder water two out of the three trials. However, the results showed no significant difference in gill movement in various temperatures of water. This has very little effect on the broad field of science since our only three trials were performed and may have included human error in the trials.

high pressure in order to fracture rocks to release gas inside. Some types of fracking are

Is this reaction endothermic or exothermic? What does that mean and how do you know? (~3 sentences)

Christopher and Kate noticed that after a rainstorm some of the rocks in their yard appear to shrink. They wondered how the mass of the rocks changed when dissolved in water. To

water fractures within the earth. Causing certain areas of the land to have an earthquake effect

Some rock’s in the Earth’s interior that are solid, are so hot that, if the pressure on these were released, or they are convected into a lower pressure zone, they could begin to melt

They are called transversal when pressure builds and the rock breaks the energy of the break

The group first measured the masses of the four bouncy balls and then measured how high the ball bounced, being dropped at 20 inches, in room temperature and recorded the data. Then heated up water in a 250mL beaker using a hot plate to about 85-90 degrees Celsius, put the bouncy ball in a smaller beaker and held it in the water for five minutes, making sure not to get the ball wet, repeat this procedure for all four bouncy balls. After the five minutes were up, the masses of the balls were measured and then tested the ball to see if when the ball was heated, it might affect the height of the bounce. The results were recorded. Next, a 250mL beaker was filled up with water about half way and then put ice in the water to make it cool down to 5-10 degrees Celsius. A bouncy ball was then put in a smaller beaker and held the small beaker with the ball inside the ice water for five minutes, doing this for all four bouncy balls. After the time was up, the group again measured the mass and tested the height of the bounce and recorded the results. When dropping the ball to measure the height of the bounce, the ball was dropped from 20 inches for each trial in all three

The jar was held in place so that it did not obstruct airflow in straw when it was placed over the candle. The process of trial 1 was repeated three times with the additional straw.

What we did in this lab first we did was shake the cup with the sugarcubes in it and break it down to weigh it. The cubes represented the rocks, we used sugarcubes because they are like rocks and they break easily. I thought the sugarcubes were going to break down and it was just going to be powder. What did not happen was they broke all the way down to a powder. My data does not make a perfect line because it was a prediction and predictions are not always right.

Seen in the picture Both the humans and the animals use evaporative cooling when they sweat to cool down their body. Connection to specific heat Water has a high specific heat and it also has a high heat of vaporization. The result of this is because of the polarity of water molecules. Because the atoms covalent bond is so uneven, the oxygen side is very negative and the hydrogen sides are very positive.

The purpose of the Freezing Point Lab was to measure freezing points for various solute-solvent solutions in order to understand the effects of colligative properties. This process was done by comparing the freezing point of various solutions. The measured freezing point temperature for pure p-xylene was gathered in order to have a reference in terms of freezing point for future solutions. This value was then used in order to calculate K_f for p-xylene, also known as the freezing point depression constant. By using this value of for solute concentration, the molar mass of three unknowns were able to be calculated using the equation MM solute=

Weigh limestone before putting in solution. Record the weight of each rock individually and what beaker it will be going into. Let limestone sit in solutions overnight. Take them out with tongs Place it on a watch glasses, labeled 1-4.

Firstly, after removed from the Bunsen burner, the crucible was not given time to cool down before being weighed. Weighing a hot crucible can affect the accuracy of measurements by making the crucible appear to weigh heavier, causing the results to be overstated. Secondly, as state in the paragraph above, both samples did not weigh exactly 2g. In trial 1, the sample weighed slightly less than 2g but in trial 2 the sample weighed slightly more than 2g. Consequently, the net weight for the solid in trial 1 was understated and the net weight for the solid in trial 2 was slightly