Answer:
The color is considered dark if the rock appears as a dark gray to black (pyroxenes, the amphibole Hornblende, the mostly Ca-plagioclases near Anorthite, and Biotite mica. Density is a property that is proportional to the composition of the rock. The higher the amount of silica (felsic) the less dense the rock will be.
Explanation:
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The correct answer to this open question is the following.
The simple ways you can do or contribute in order to lessen the effect or to fight the natural calamities are the following.
First, Filipino people have to know that mother Earth is a conscious being, like. us. The earth has inner processes to renew itself or to clean itself that have happened since the Earth exists: these are hurricanes, typhoons, tornados, earthquakes, deluges, rains, volcanic explosions, and climate changes.
People have to be aware of this and be prepared. The best form is to have a plan. A prevention plan and an action plan. They have to invest in infrastructure to control and diminish the consequences of natural phenomena. The government has to develop the educational and informative to let people know what to do in the case of these events. Their rescue programs and services have to be well prepared with the proper equipment to act swiftly.
Answer:
D) radio waves
Explanation:
Radio Waves -- The waves in the electromagnetic spectrum that have the longest wavelengths and lowest frequency are called radio waves. Radio waves are used to transmit information from the antenna of a broadcasting station to the antenna of your radio or TV.
There are multiple reasons for the variations in type, quality, and quantity in minerals, such as:
- place of formation, on the surface, or inside the ground and how deep inside.
- pressure; extremely important for the structure of the minerals as well as the mixing of mineral types.
- temperature; similar to the pressure, in fact in combination with it, affects the structure of the minerals.
- tectonic activity and volcanic activity; cause the other factors and are also responsible for the quantity of minerals.
