just add water.,september

the next activity is about the changes in thermal energy. first we will define thermal energy. thermal energy is heat energy in transfer. heat is a form of energy. when heat it is in the process of being transferred, it is called thermal energy.



the objective of this activity is to know what will happen if you add cold water to the hot water when both have the same mass.



materials:

• 4 plastic foam cup


• scissors


• balance


• thermometer


• hot and cold water

procedure:

• label the first cup with H for hot water and the second cup with C for cold water.


• get the 2 cups then cut 2 to 3 cm from the top of each cup. using a pencil, poke a hole on the bottom of each cup, make sure that the thermometer will fit on both cover. label both cup with C and H.


• measure the mass of cup without the cover. record.


• add hot water (1/3 of the cup) to the cup labeled H and cold water (same amount) to the cup labeled C.


• measure their mass then their temperature. record.


• pour the cold water to the hot water. measure the temperature. record.

conclusion:

if you add cold water to the hot water with the same mass, the temperature will change because the heat coming from the water is absorbed by the cup then as you add cold water in it, the absorbed heat is transferred again to the water. the amount of heat transferred is equal to the amount of heat absorbed by the cup.

Thermal Energy is the kind of energy that is related to and/or caused by heat. When thermal energy is applied to a substance, the average velocity of the particles or molecules which make up the substance increases -- and it gets warmer!