Coal can disrupt life and air. Coal is a non reusable resource and it can make life harder. Coal can heat homes and power trains.
Answer: PHYSICAL change
Explanation: chemical changes usually have to do with air and pollution and things like that.
Answer:
Explanation:
The relative ages of rocks are important for understanding Earth's history. New rock layers are always deposited on top of existing rock layers. Therefore, deeper layers must be older than layers closer to the surface. This is the law of superposition.
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