Question

What do these two changes have in common?

milk going sour
dew appearing on grass in the morning
Select all that apply.
Both involve chemical bonds breaking.
Both conserve mass.
Both result in a different type of molecule than
was there before.
Both are changes of state.

Answer 1

Milk going sour and dew appearing on grass have commonalities in terms of chemical bonds breaking, being changes of state, and resulting in different types of molecules.

Step-by-step explanation:

Both involve chemical bonds breaking: In the case of milk going sour, lactic acid bacteria break down the lactose sugars into lactic acid, causing the milk to sour. In the case of dew appearing on grass, water vapor in the air condenses and forms small droplets on the grass due to the cooling of the grass surface.

Both are changes of state: Milk going sour is a chemical change, while dew appearing on grass is a physical change. Both involve a transformation from one state to another.

Both result in a different type of molecule than was there before: In the case of milk going sour, the lactose molecule is converted into lactic acid. In the case of dew appearing on grass, the water vapor molecules condense to form liquid water droplets.

Learn more about Chemical changes in state