What determines the viscosity of magma? What else determines whether a volcano will erupt violently or calmly 
AnswerThe two main factors that influence how a volcano will erupt are viscosity and gas content. Both are related to the composition of the magma. Hawaiian volcanoes tend to erupt basalt, which is low in viscosity and low in gas content (about 0.5 weight percent). The gas that is present can readily escape and little pressure builds up in the magma. At the other extreme, rhyolite magmas are very viscous and can contain a lot of gas (up to 7-8 weight present). As the magma moves into the vent and the pressure drops, the gas wants to escape. The magma is very sticky and resists the expansion of the gas bubbles. Ultimately, enough bubbles grow and expand to blow the magma into ash size fragments and eject them violently into the atmosphere.

Answers

Answer 1

The viscosity of magma is determined by its silica content. Basalt magma, on the one hand, which is often of low viscosity, has a low silica content of approximately 50% or less. Rhyolite magma, on the other hand, has high viscosity due to the high silica content of approximately 70% and more.

Gas content and temperatures of the magma are the other factors that determine an explosive or nonexplosive eruption. High temperatures and high gas content (coupled with high viscosity) cause violent explosions.


Answer 2

Final answer:

The viscosity of magma is influenced by its composition. Low silica magma has low viscosity, while high silica magma has high viscosity. Gas content also plays a role, with low gas content leading to calm eruptions and high gas content leading to violent eruptions.

Explanation:

The viscosity of magma is influenced by its composition. Magma with a low silica content, such as basalt, has low viscosity, meaning it is more fluid and flows easily. On the other hand, magma with a high silica content, such as rhyolite, has high viscosity, meaning it is sticky and doesn't flow easily.

Another factor that determines how a volcano will erupt is the gas content of the magma. Basaltic magmas typically have low gas content, allowing the gas to escape easily and resulting in calm eruptions. In contrast, rhyolitic magmas can have high gas content, and the sticky magma resists the expansion of gas bubbles, leading to violent eruptions.


Related Questions

This type of animal tissue can be divided into two types, voluntary and involuntary. 1 epithelial
2 muscular
3 smooth
4 nervous

Answers

2. muscular

skeletal muscle (voluntary)
smooth muscle (involuntary)

Answer:

2. muscular tissue.

Explanation:

The muscular tissue is responsible for the movement of the body, body parts, and organs. About 40% of our body is formed of muscles. The muscle tissue is made up of highly contractile muscle fibers.  

There are 3 types of muscular tissues - skeletal muscle / voluntary muscle, smooth muscle / involuntary muscle, cardiac muscle.

Skeletal muscles are striped in appearance and hence called as striated muscles. Their muscle activities are under the control of an individual's will. Therefore, these muscles are known as voluntary muscle.  

The second type of muscular tissue is smooth muscle. These are located in the inner wall of visceral organs such as the GI tract, reproductive organs, etc. They are smooth in appearance, hence known as smooth muscle. These muscles are not under the control of one's will. Hence it is called involuntary muscle.  

The third type of muscle is cardiac muscle. It is exclusively present in the heart. Many cardiac muscle cells are arranged in branches to form a cardiac muscle.

Free radicals are formed in the __________, and when you exercise, the increased use of ________ causes a(n) _____________ in free radicals.

Answers

Here are the answers:

Electron transport system for the first blank
oxygen for second blank
increase for the last blank

Free radicals are atoms that has an odd number of electrons and usually formed when an oxygen interacts other molecules. The formation of radical will result into damage of the main cellular components such as DNA. This can alter the signalling pathways inside the cells. This is usually involved in various diseases such as in cancer wherein the mutation can be caused by the alteration on the DNA within the nucleus. Other diseases that are involved or related are Parkinson's disease, alzheimer's, schizophrenia.

A cell is to a board game as what is to a rule book

Answers

The answer is DNA.
A cell is complex, like how a board game has many pieces, and the DNA tells the cell how to work, like how rule books tell you how to play.
Final answer:

A cell is to a biological organism as a rule is to a rule book for a game. Both provide the basic framework for their respective systems, laying out the foundations for activity and interaction.

Explanation:

Just like a cell is the basic building block of a biological organism, a rule in a rule book is the fundamental basis for playing a game.

In biology, cells are the smallest unit of a living thing and form the foundation for all biological activity, much like the rules of a game lay out the foundation for how the game is to be played.

For instance, in a chess game, the rules define what moves each piece can make. These rules, while constant and unchanging, are used by players to strategize and influence their game play, just as cells, while consistent in their basic structure and function, adapt and interact differently depending on their environment.

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In this ecosystem diagram, pollution and human activities have led to a decrease in the number of eagles. A sudden viral attack on rabbits has led to a decrease in the population of rabbits in the ecosystem. Based on these changes, which two of the following predictions are scientifically sound?

Answers

We need to see the predator relationships that exist in the system but also the competition for various food sources. The fact that eagles  decrease, means that their direct prey, snakes will increase in numbers; similarly, the grass will increase for a while; but rabbit were competing with gnats for the grass. Now that rabbits are gone, the gnats will proliferate. Now, knowing that, we can eliminate answer choices b, c, d, so we are technically done. To verify e), notice now that the snakes that are preying on frogs will increase in numbers; thus the frogs will decrease.

If you are writing a report on your family tree, all of these are considered primary sources EXCEPT A) a photograph B) a diary entry C) a birth certificate D) a guide to family research

Answers

D. A Guide to family research

Answer:

D

Explanation:

A guide to family research is a source, but it is not primary. A primary source is not presented by a third party; it is direct.

Why is it possible to detect the pungent odor of ozone after a lightning storm?

Answers

Energy from lightning or from an electrical are associated with a transformer can cause oxygen molecules in the air to split from oxygen atoms. The oxygen atoms then react with oxygen molecules to produce ozone.

The pungent smell of ozone after a lightning storm is caused by the formation of ozone from oxygen due to the electric discharge from lightning, leading to ozone's characteristic sharp odor.

The pungent odor of ozone detected after a lightning storm is due to the formation of ozone from oxygen during electrical discharges. When a lightning strike occurs, the high energy from the electric discharge breaks the chemical bonds of atmospheric oxygen (O₂), creating free radicals. These oxygen radicals then recombine to form ozone (O₃), an allotrope of oxygen with a characteristic sharp smell that is often likened to chlorine bleach. Ozone can be hazardous in high concentrations, causing headaches, burning eyes, and respiratory irritation.

To prepare for an important midterm, Zoe studies 90 minutes each night for five nights. Zoe's method exemplifies:

Answers

The answer would be: Distributed practice
Distributed practice is a method of learning that involves a repeated session of practice over a period of time. It is more effective than a longer session in short period of time. The spacing effect in this method will make it easier to store learned lesson into long-term memory. 

Mass wasting _____. A) is the movement of sediment up a slope B) happens when glaciers pluck rocks from Earth's surface C)only happens in hot climates with a lot of moisture D) is caused by weathering and gravity

Answers

The correct answer is D: is caused by weathering and gravity.

Which technique takes advantage of the requirement of glucose for more fuel?

Answers

2-DG Autoradiography

2-DG Autoradiography is a technique used to study the neuronal organization of certain aspect of behavior such as hibernation, thought, sleep and language. This technique can also be used to correlate some specific aspect of human behavior to regional pattern of glucose utilization in the brain. However, 2-DG Autoradiography was developed by sokoloff and his associates to determine and measure glucose utilization in the brain.

In humans excess glucose is stored as the polysaccharide known as

Answers

Answer:

Glycogen

Explanation:

altitude is the greatest factor determining climate conditions true or false
20 POINTS PLS HELPP

Answers

the answer is false. Hope this helps!
Altitude does affect climate as temperature decreases by 0.6 degrees for every 100m above sea level, however I wouldn’t say it is the greatest factor. I would say false.
Wind direction and latitude are more likely to have a greater affect on climate.

_______ organisms maintain homeostasis by having organs and organ systems.

A. Unicellular
B. Multicellular
C. both a and b
D. none of the above

Answers

The answer to this is multicellular. Unicellular organisms' life processes all take place in the one cell which is their entire being - their entire existence - whereas multicellular organisms require specialized organs and organ systems to keep us alive.

Answer.
B. Multicellular

Zara is an excellent violin player. Which part of her brain is responsible for the motor skills involved in playing a violin?
thalamus
medulla oblongata
hypothalamus
cerebellum

Answers

Cerebellum hope I helped !

Answer:

its defiantly the Cerebellum i got 5/5 on Plato!

Explanation:

How did more sophisticated microscope have allowed scientists to advance their knowledge of cells?

Answers

because they have an enhanced sight due to the amount of magnification and objective lens

The __________ is commonly used to identify aerobic microorganisms.

Answers

The answer would be oxidase test.

Aerobic bacteria could use oxygen to create energy so they will survive better in an environment with high oxygen content. That happens because they have an enzyme that allows the uses of oxygen, called oxidation. 
Aerobic bacteria will have positive oxidase test indicated by the change of color into violet or purple.

In corn snakes, the wild-type color is brown. one autosomal recessive mutation causes the snake to be orange, and another causes the snake to be black. an orange snake was crossed to a black one, and the f 1 offspring were all

Answers

Is this a question if it is please make it clear because it seems to me that your not asking anything

Answer:

s this a question?

Explanation:

The plant life cycle has mitosis occurring in spores, produced by meiosis, that germinate into the gametophyte phase.

A.true
B.False

Answers

Answer:

The statement about the plant cycle is true.

Explanation:

All plants experience an actual existence burn that takes them through both haploid and diploid ages. The multicellular diploid structure of plant is known as the sporophyte that produces spores through meiotic (agamic) division. The multicellular haploid structure of plant is known as the gametophyte, which is shaped from spore and offer ascent to haploid gametes.  

The change between these haploid stage and diploid stage that happens in plants is known as the generations alternation. The manner by which the generations alternation happens in plants relies upon the kind of plant. In bryophytes (greeneries and liverworts), the predominant age is haploid, so the gametophyte includes what we consider as the primary plant.

The inverse is valid for tracheophytes (vascular plants), in which the diploid age is predominant and the sporophyte involves the primary plant.

Sofia wants to help take care of dolphins and other sea mammals which field of study would be most useful to her

Answers

The study of marine life
I believe it would be marine biology 


Figure 17-2 shows highest fitness toward the center of the curve. When individuals with an average form of trait have the highest fitness the result is
A-not predicable
B-disruptive selection
C-directional selection
D-stabilizing selection

Answers

D. Stabilizing selection

Answer:

Option-(D): Stabilizing selection.

Explanation:

Stabilizing selection:

The process in which a limited or specific number of the species get the chance to evolve through time or they get the best of chances to survive in any environment. As some of the traits may be lost due to the stabilizing form of natural selection.

Diversity is found all across the living beings, but when the process of natural selection follows the stabilizing pathway for selection then it will surely cause the end to diversity among beings.

For example:

The number of eggs that a bird lays and along with the weight of a human being child at the time of birth can be referred to as the stabilizing form of natural selection

What term describes the competitive buildup of weapons systems?

Answers

The answer is arms race. An example is the cold war era nuclear arms race between the United States and the Soviet Union. Today's superpowers such as China, Russia and United States are also engaged in an arms race for the most technologically advanced weaponry.

What type of ecosystem covers most of the islands of southeast asia?

Answers

The type of ecosystem that covers much of South east Asia is the Rainforest Ecosystem. This ecosystem is characterized by heavy rainfall all year round (up to 4000 mm in some regions). The Temperature does not fluctuate much but remains in the range of 27-33 degrees Celsius annually.
Rain forest ecosystems have deep red soils known as latosols. Species are very diverse; both plants and animals. The trees here can reach up to 40 metres tall for the emergent layer. Trees are tall and have buttress roots for support. The leaves of plants have drip tips to allow water to run off quickly.

organisms in the aquatic ecosystem in the picture must be adapted to which abiotic factors

Answers

WATER........................................

Organisms in the aquatic ecosystem in the picture must be adapted to several abiotic factors, including water temperature, dissolved oxygen levels, pH levels, water flow rate, and nutrient availability.

What are abiotic factors?

Abiotic factors can greatly impact the survival and growth of aquatic organisms, so they have developed various adaptations to cope with these conditions.

An example of the effect of abiotic factor on organisms in aquatic ecosystem is that fish may have special respiratory systems to extract oxygen from water with low dissolved oxygen levels, and algae may have specialized pigments to absorb light in deep waters with low light availability.

Additionally, some organisms may be able to regulate their body temperature or tolerate extreme pH levels to survive in their aquatic habitat.

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n a scientific experiment, the factor that may change in response to the manipulated variable is called the ______ variable.

Answers

I believe the answer is Responding or Dependent variable.
Let's say that a study is conducted in order to find out whether Drug A could work in slowing down the growth of Cancer Cells.
In this case, Drug A is considered as Independent variable and Growth of the Cancer Cells is considered as Dependent Variable.

Swamps differ from marshes in that swamps _____.
A) are dominated by trees and shrubs
B) are dominated by grasses and rushes
C) have acidic soil
D) are rich in waterfowl

Answers

Answer: A) are dominated by trees and shrubs.

Swamps and marshes both are wetlands. Swamps are wetlands, which are occupied and dominated with woody trees such as mangroves and cyprus trees and shrubs whereas the marshes are not occupied with woody trees instead they exhibit reeds, grasses and sedges. The swamps are more deeper wetlands than the marshes hence, supports the growth of the trees.

Answer:

trees and shrubs

Explanation:

Put the protein digestion steps in order of their occurrence during the digestive process.

Answers

Protein digestion is a process of reducing the dietary protein into a pool of amino acids in the gastrointestinal tracts. These amino acids are then absorbed and transported to cells where they will mix and form variety of proteins the body needs. However, the process of digestion takes place in the mouth and ends in the small intestine with the help of enzymes and digestive juices.

Steps

· Mouth: chewing of protein rich food which increase the surface area of the food particles and aid the process of digestion.

· Stomach: the acid in the stomach denature and unfold the protein rich foods in other for digestive enzymes to act on the protein. This digestive enzyme digests the protein into smaller molecules called peptides.

· Small intestine: In the small intestine, more protein- digesting enzymes  that originate from pancreas and cells lining in the stomach work on the peptides and break them down into smaller peptides and sniped off the amino acid one by one.

Protein digestion occurs in various steps. Protein is made up of polypeptides so the peptide linkage between them has to be broken down first. The protein is then converted into peptides. Peptides are further broken down to amino acid which acts as the simplest molecule for absorption.

Further explanation:

Protein is a biomolecule which consists of amino acids. The amino acids are linked together through the peptide linkage. It is the complex molecule which is broken down into smaller molecules during the process of digestion.

Most of the protein digestion takes place in stomach. In stomach, pepsin produced by stomach chief cells acts on protein and converts it into peptides. Various proteases are involved in digestion of different types of proteins.

Trypsin, elastase chymotrypsin and carboxypeptidase produced by pancreas is released into duodenum where they acts on protein and peptides and converts them into peptides and amino acids, respectively.

Aminopeptidase and dipeptidase present at the surface of intestine converts peptides into amino acids.

The proteins coverted into amino acids are then absorbed by small intestine through the help of microvilli. The microvilli provide good surface area for the absorption to occur in the small intestine.

Learn more:

1. Learn more about protein structure https://brainly.com/question/1420458

2. Learn more about protein locations https://brainly.com/question/5923583

3. Learn more about amino acids https://brainly.com/question/5050077

Answer Detail:

Grade: Middle school

Subject: Biology

Chapter: Digestion

Keywords:  

Proteins, biomolecule, amino acids, peptide, digestion, pepsin, proteases, trypsin, elastase chymotrypsin, carboxypeptidase, pancreas, aminopeptidase, dipeptidase.

What is the primary function of dynamic study modules? g?

Answers

Answer:

Assess what a student already knows, and where he or she may want to focus additional study

Explanation:

took it

Final answer:

Dynamic study modules are designed to provide personalized, effective learning experiences. They adapt to students' knowledge levels and learning speeds, continuously assessing and reinforcing until mastery is achieved.

Explanation:

The primary function of dynamic study modules lies in their ability to promote personalized and effective learning. These tools adapt to individual students' knowledge levels and learning speeds, continuously assessing understanding and proficiency as the student moves through the module. The modules are designed to identify areas of difficulty, and then to revisit these areas until comprehension is demonstrated, promoting mastery of the topic. This results in more engaged learners and often leads to increased academic performance.

Learn more about Dynamic study modules

Research has shown a link between cancer and which sexually transmitted disease

Answers

Research has found a link between human papillomavirus (HPV) and various types of cancer. In women, this is cervical cancer, whereas in men, a link to penile cancers has been found. For both sexes, links to cancers of the mouth, throat, and anus have been found.

In organisms with large genomes, inversions are more likely to be tolerated if the breakpoints occur in:

Answers

The answer is telomeres. These are the regions at the end of the chromosomes that are composed of random repeats of nucleotide sequences. When the DNA is duplicated entirely by DNA polymerases such as during mitosis, the lengths of chromosomes reduce slightly by every duplication. This is due to the aspect of the lagging strands replication that is unable to be completed to the end of the chromosome. Therefore telomeres protect the chromosome from losing critical genes since mutations on telomeres will not affect the cell functionality.  


In a windmill, electrical voltage is produced in the _____. rotor blades shaft generator wires to your house

Answers

In a windmill, electric voltage is produced in the GENERATOR. A generator is a machine that produces a voltage by means of electromagnetic induction. This is done by rotating coils of wire through a magnetic field or by rotating a magnetic field or by rotating a magnetic field past coils of wire.
The wind serves as the energy that sustains this rotation at it drives the arms of the device to spin.

The generator boo boo kitty

What are purebred organisms

Answers

Hello!

Purebred organisms, also known as true-breeding organisms, are organisms that always pass down phenotypic traits. It's offspring of a couple generations that have the same form of the trait.
Final answer:

Purebred organisms are individuals from the same species with consistent genetic traits passed down through generations of selective breeding. They can serve as key models for the study of genetics and the preservation of specific traits.

Explanation:

Purebred organisms are individuals of a species that possess a uniform set of genes for certain traits as a result of selective breeding or natural processes that encourage inbreeding among genetically similar individuals. Such organisms are bred intentionally to ensure that the traits are passed on to their offspring. To be considered a purebred, both parents must be purebred themselves, often for many generations back, which creates offspring that are genetically uniform.

In biology, organisms broadly encompass living entities that share certain characteristics such as reproduction, growth, and the ability to maintain homeostasis. Within species, reproduction can occur sexually or asexually, with purebred organisms being a result of controlled sexual reproduction, sometimes reinforced by artificial selection in agriculture or dog breeding, for instance.

By understanding how purebred organisms are created and maintained, scientists can preserve desirable traits and study the genetic underpinnings of those characteristics.

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