Answer:
Coal is not classified as a mineral because it is made from organic materials.
Explanation:
Coal is produced from decomposed organic plants. Although rocks are made from inorganic material like minerals, coal is however, classified as an organic sedimentary rock.
Minerals are produced from combined elements. It is formed naturally by a specific chemical combination. Minerals include beryl, pyrite, diamond, and azurite. Minerals are inorganic.
Answer: people sought the steam boat for not only the purpose of transporting goods, but also for transportation
VERY bare bones back then as the country was still very young back then, there was also limitations to getting/ spreading knowledge as the people back then had limited ways to discover new things.
D. Increased industrial development
The amount of rain falling on the cactus plants.
Answer: Option C
<u>Explanation:</u>
Here, the independent variable is the amount of rain that makes the cactus plant grow taller. Control is treated the same as all the rest of the samples, except that it is not exposed to variables that are influenced.
In most experiments, it is important to perform a trial with the independent variable, at a special locale for comparison with the other trials.
The control group consists of all trials where the independent variable is left in its natural state. These trials provide a basis for comparison and ensure that any changes observed in the height of cactus plant are in fact caused by the amount of rain.
