Before your food passes from the mouth and down your esophagus, salivary amylase, an enzyme in saliva, begins to digest the starch in your bread. That is the start of chemical digestion. ... The passage of the bolus through the esophagus to the stomach occurs by peristalsis, a series of wave-like muscle contractions.
Look out side in the morning you see fog that is a chemical reaction
Explanation:
The law of superposition of strata is one of the principles used in assigning rock strata according to their relative ages.
The law states that "in an undisturbed sequence of rock strata, the oldest rock layer is at the bottom and the youngest on top".
- In a sequence of sedimentary rocks that has not been disturbed, the oldest rock layer is at the bottom.
- This is the layer that was first deposited in the basin.
- Subsequent layers were deposited in the basin.
- These layers are younger than the one at the base that was first deposited.
- First deposited, at the bottom is the oldest layer.
learn more:
Sedimentary rocks brainly.com/question/9131992
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