Answer:
The waves move outwards from where the rock hit. When the waves pass the wood, it bobs up and down. In the case of the falling dominoes, the movement of the dominoes was in the direction parallel to the movement of the wave, longitudinal.
Explanation:
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Because people and animals exhale carbon dioxide which plants need and they release oxygen
A substance with pH 6 would be an acid, because it's 1pH to the left of a neutral substance
Hormones and water balance are another two conditions which are maintained by cells.
