Which procedure could be used to demonstrate that matter is conserved during a physical change?(1 point)
Responses
Find the mass of a raw egg. Cook the egg. Find the mass of the cooked egg.
Find the mass of a raw egg. Cook the egg. Find the mass of the cooked egg.
Find the mass of a cup of water. Boil the water. Find the mass of the water that remains.
Find the mass of a cup of water. Boil the water. Find the mass of the water that remains.
Find the mass of a piece of ice. Let the ice melt. Find the mass of the liquid water.
Find the mass of a piece of ice. Let the ice melt. Find the mass of the liquid water.
Find the mass of an apple. Cut the apple and remove the core. Find the mass of the remaining apple.
To demonstrate that matter is conserved during a physical change, you have to conduct an experiment where the system is closed, meaning no matter is added or escapes during the change. Each of the example processes you've described involves a physical change.
Let's evaluate the options:
1. Find the mass of a raw egg. Cook the egg. Find the mass of the cooked egg.
- Issues: During cooking, parts of the egg might stick to the cooking surface, or water may evaporate, leading to a loss in mass that's not due to the actual material disappearing but rather escaping to the environment.
2. Find the mass of a cup of water. Boil the water. Find the mass of the water that remains.
- Issues: Boiling the water would cause it to evaporate. Unless the water vapor is captured and measured, this would not accurately show conservation of mass.
3. Find the mass of a piece of ice. Let the ice melt. Find the mass of the liquid water.
- This is a suitable experiment because melting is a physical process that doesn't involve the removal or addition of mass. If done in a sealed container to prevent any loss of water from evaporation, it would show that the mass of the ice is the same as the mass of the liquid water.
4. Find the mass of an apple. Cut the apple and remove the core. Find the mass of the remaining apple.
- Issues: This is technically not a closed system as part of the apple (the core) is removed, so it doesn’t show that mass is conserved during the physical change because mass is intentionally removed from the system.
Of these choices, the one that best demonstrates the conservation of matter during a physical change is:
** Find the mass of a piece of ice. Let the ice melt. Find the mass of the liquid water. **
This shows a state change (solid to liquid) without the matter leaving the system, assuming it is done in a closed environment.