With procedure could be used to demonstrate that matter is conserved during a physical change
Find the mass of an apple. Cut the apple and remove the coore. Find the mass of the remaining apple
Find the mass of a raw egg. Cook the egg. Find the mass of the cook egg
Find the mass of a piece of ice. Let the ice melt . Find the mass of the liquid water
Find the mass of a cup of water. Boil the water. Find the mass of the water that remains
These procedures could be used to demonstrate that matter is conserved during a physical change:
1. Find the mass of an apple. Cut the apple and remove the core. Find the mass of the remaining apple.
- Obtain a fresh apple and measure its mass using a scale.
- Carefully cut the apple and remove the core.
- Measure the mass of the remaining apple pieces using the same scale.
- Compare the initial mass of the whole apple to the combined mass of the apple pieces. If the mass remains the same (or very close), it demonstrates that matter is conserved during the physical change of cutting and removing the core.
2. Find the mass of a raw egg. Cook the egg. Find the mass of the cooked egg.
- Weigh a fresh raw egg using a scale.
- Place the egg in a pot of boiling water and let it cook completely.
- Carefully remove the cooked egg from the pot and let it cool down.
- Once cooled, measure the mass of the cooked egg using the same scale.
- Compare the initial mass of the raw egg to the mass of the cooked egg. If the mass remains the same (or very close), it demonstrates that matter is conserved during the physical change of cooking.
3. Find the mass of a piece of ice. Let the ice melt. Find the mass of the liquid water.
- Measure the mass of a solid piece of ice using a scale.
- Place the ice in a container and allow it to melt completely at room temperature.
- Carefully pour the liquid water formed from the melted ice into a measuring cup and measure its mass using the same scale.
- Compare the initial mass of the solid ice to the mass of the liquid water. If the mass remains the same (or very close), it demonstrates that matter is conserved during the physical change of melting.
4. Find the mass of a cup of water. Boil the water. Find the mass of the water that remains.
- Measure the mass of a cup filled with water using a scale.
- Heat the cup of water to boiling point until it completely evaporates.
- Allow the cup to cool down and measure its mass again using the same scale.
- Compare the initial mass of the cup of water to the mass of the cup after boiling. If the mass of the cup remains the same (or very close), it demonstrates that matter is conserved during the physical change of boiling and evaporation.