which procedure could be used to demonstrate that matter is conserved during a physical change?
a. Find the mass of a cup of water. boil the water. Find the mass of the water that remains.
b. Find the mass of a piece of ice. Let the ice melt. Find the mass of the liquid water.
c. Find the mass of an apple. Cut the apple and remove the core. Find the mass of the remaining apple.
d. Find the mass of a raw egg. Cook the egg. Find the mass of the cooked egg.
a. Find the mass of a cup of water. boil the water. Find the mass of the water that remains.
To demonstrate that matter is conserved during a physical change, you could use procedure:
a. Find the mass of a cup of water. Boil the water. Find the mass of the water that remains.
By comparing the initial mass of the water before boiling with the mass after boiling, you can determine if matter is conserved during the physical change of water boiling. If the mass remains the same, it demonstrates that matter is conserved.
The correct procedure to demonstrate that matter is conserved during a physical change is option b: Find the mass of a piece of ice. Let the ice melt. Find the mass of the liquid water.
To explain the reasoning behind this choice, let's consider the conservation of mass. According to the Law of Conservation of Mass, matter is neither created nor destroyed in a chemical reaction or a physical change. This means that the total mass of the reactants or substances involved before the change should be equal to the total mass of the products or substances after the change.
In this case, when a piece of ice melts and turns into liquid water, it undergoes a physical change. By weighing the initial mass of the ice and then measuring the mass of the resulting liquid water after it has melted, you can compare the values. If the masses are the same, it provides evidence that matter is conserved during the physical change, supporting the principle of the Law of Conservation of Mass.
By applying similar reasoning to the other options:
a. Boiling the water does not necessarily demonstrate conservation of mass because some of the water could evaporate as steam, causing a decrease in mass.
c. Cutting an apple and removing the core results in a physical change, but it does not guarantee that the mass of the remaining apple will be the same as the initial mass. Some matter may be lost or removed during the process.
d. Cooking an egg involves a chemical change when the proteins denature, which means that the composition of the egg changes. Therefore, measuring the mass of the raw egg and cooked egg may not provide accurate evidence of mass conservation during a physical change.
In conclusion, option b - finding the mass of a piece of ice, letting it melt, and comparing the mass of the liquid water - is the most appropriate procedure to demonstrate that matter is conserved during a physical change.