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What are the terms felsic and mafic used by geologists to describe?
Geologists use the terms felsic and mafic to describe the compositions of igneous rocks. Felsic rocks are rich in silicon and aluminum, making them lighter in color and less dense. Mafic rocks are richer in magnesium and iron, making them darker in color and denser.
What happens if the percentage of felsic minerals in a rock increase?
If the percentage of felsic minerals in a rock increases, the rock will become lighter in color and less dense. Felsic minerals are rich in silica and aluminum, so the rock may also become more viscous when melted. Additionally, the rock's melting temperature may decrease.
Why is the b horizon lighter in color than the a or o horizons?
The B horizon is lighter in color than the A or O horizons because it contains less organic matter and minerals that contribute to darkening the soil. The B horizon is typically made up of material that has been leached of these darker substances, leaving behind lighter-colored minerals.
Does soil color change as you get deeper?
Yes, soil color can change as you go deeper. This is due to factors like the composition of the soil, the presence of minerals, organic matter, and microbial activity. As you go deeper, the color may become darker or lighter depending on these factors.
What mineral that affects magma thickness?
The mineral that affects magma thickness is silica. Magma with high silica content tends to be more viscous, resulting in thicker magma. Conversely, magma with low silica content is less viscous and flows more easily.
Is a rock with more silica in it likely to be lighter or draker than a rock with less silica in it?
A rock with more silica is likely to be lighter in weight and have a lighter color compared to a rock with less silica. Silica is a lower density mineral compared to other common rock-forming minerals, which can influence the overall density and color of the rock.
What is the silica composition of igenous rocks?
Igneous rocks typically contain high levels of silica, with compositions ranging from about 45% to over 70% silica. This silica content influences the overall properties of igneous rocks, such as their color, density, and volcanic activity. Rocks with higher silica content are generally lighter in color and less dense, while those with lower silica content are darker and denser.
Has anyone been able to explain why lighter hair has less oil than darker hair?
Lighter hair typically appears less greasy because the sebaceous glands produce the same amount of oil regardless of hair color, but it is more noticeable on darker hair. Light hair reflects light, making oil less visible, while darker hair absorbs light, making oil more apparent.
Why is magma that contains little silica less likely erupt explosively?
Magma with less silica is thinner and runnier.Therfore, gases can move out of the magma easily.
Do darker objects absorb more or less energy than lighter ones?
Darker objects absorb more energy than lighter ones because they absorb a greater amount of light and convert it into heat. Lighter objects reflect more light, which means they absorb less energy.
Are darker colors more absorbent of light than lighter colors?
Yes, darker colors tend to absorb more light because they reflect less light compared to lighter colors. This is due to the higher pigment concentration in darker colors. Lighter colors tend to reflect more light, making them appear brighter.
What is the role of the melanin in the skin?
It is what gives your skin color. If you have more melanin in your skin, your skin will be darker, if you have less, your skin will be lighter.
Do Lighter color surfaces reflect more or less energy than darker colored ones?
Lighter color surfaces typically reflect more energy than darker colored ones because they absorb less sunlight. Lighter colors reflect more of the sun's rays, whereas darker colors absorb more of the sun's energy and heat up faster.
Light colored igneous rocks are less what than dark igneous rocks?
Dense. Light colored igneous rocks have lower density compared to dark colored igneous rocks due to their higher silica content, which results in slower cooling and the formation of larger crystals.
Why does a lighter colour reflect more light?
Lighter colors reflect more light because they contain less pigment and absorb less light compared to darker colors. When light hits a lighter surface, it is not absorbed as much and is instead reflected back, giving the surface a brighter appearance.
Is something wrong with you if your pee turnes darker?
When your pee is darker it means it's more concentrated so you need to drink more water, the more water you drink the lighter your pee will be and the less smelly too.
Why is your hair color they color it is?
Hair color is caused by the pigments in your body. The less pigment you have the lighter your hair. Less pigment also means you will have lighter skin that is why people who have darker skin have darker natural hair usually and why people with lighter skin have lighter hair. the amount of pigment you have depends on who your parents are. If your parents have more pigment you will probably have more pigment and if your parents have less pigment you will probably have less. Hope this helps! :)
