Answer:
1. c. ore, 2. ore minerals or economic minerals
Explanation:
- An ore is a naturally occurring rock that contains sufficient minerals and important elements and typically metals. Ore metals are naturally found in the crust of the earth like the oxides of sulfur and silicate. Formed by a variety of geologic processes.
- <u>Crystals are a solid material thus have a fairly well-defined composition in the rocks and hence valued as a useful element by forming the internal structure of the mineral.</u>
Answer:
A
Explanation:
Trees and other plants absorb carbon dioxide from the atmosphere as they grow. This is converted into carbon and stored in the plant's branches, leaves, trunks, roots and in the soil. Cutting down of trees without allowing them to regrow, the carbon stored is released to the atmosphere in form of carbon dioxide which contributes to as much as 30 percent of global greenhouse-gas emissions.
Answer:
-all species change gradually over time.
Explanation:
Mutation often results from cell replication and division. These occur as small, random, errors within the genetic code that become more common or stable within a population over time as traits.
As organisms live within varying niches, environmental changes may render some genetic traits obsolete. However, others may become more beneficial as an adaptation. These adaptations, which make an organism and its offspring suited to a niche, and more likely to survive and reproduce become inherited- this process is called evolution.
