A six sided mineral crystal is a very hard mineral called ?

A six-sided, very hard mineral crystal capable of scratching glass is quartz, with a chemical formula of SiO2, which can appear in different colors due to trace elements.

A six-sided mineral crystal that is very hard and known for scratching glass is quartz. Quartz has a non-metallic luster and a classic six-sided crystal form, making it one of the most recognizable minerals in the Earth's crust. The chemical formula for quartz is SiO₂. This mineral's six-sided crystals and hardness are a result of the specific arrangement of silica (silicon dioxide), which can crystallize into various forms. When silica in a molten state is cooled very slowly, it forms quartz. The structure of quartz crystals makes them both durable and diverse in appearance, with various trace elements causing different colors, such as the purple in amethyst, which is caused by trace amounts of iron.

A six-sided, very hard mineral crystal is likely quartz, known for its durable six-sided crystals and various applications. Quartz becomes various gemstones like amethyst, influenced by trace elements or treatments.

A six-sided mineral crystal that is very hard is most likely quartz. Quartz is one of the most common minerals found in the Earth's crust and is recognizable by its six-sided crystal form. Its chemical formula is SiO₂, and the crystals are known for being hard and durable, making quartz useful for a variety of applications, including architectural decorations and semiprecious jewels. The mineral quartz becomes different gemstones like amethyst or citrine depending on trace impurities such as iron or heat treatments. However, it's worth noting for the sake of accuracy that the description 'very hard mineral called' could also be a reference to diamond, which is the hardest naturally occurring substance.

Producers release carbon dioxide into the atmosphere during the process of photosynthesis. select one:
a. True
b. False

John went to a picnic. he took home some leftover chicken and rice, heated it on the stove, ate it, and got sick two hours later. john thought the heating made his food safe because it would have killed any bacteria present. he didn't know that __________ produces a heat-stable toxin. view available hint(s)

how can the processes of parasitism and predation be different if they both harm organsims?

Flexor and extensor muscles work _______ to operate the joint.

One of the reasons for the success of the smallpox eradication campaign was that
a. smallpox viruses were used in the vaccine.
b. smallpox was not a transmissible disease.
c. smallpox occurred only in humans.
d. smallpox occurred only in south america.
e. smallpox could be treated with antibiotics.

What is the location of the sensory structures that translate things you see into nerve impulses?

A. On the retina
B. On the cornea
C. In the cochlea
D. In the olfactory bulb

A 20-year-old male is hospitalized with a 4-day history of cough and a temperature of 41°c. chest sounds are dull to percussion. a sputum gram stain is non-diagnostic. a blood culture is positive for gram-positive cocci in pairs. the recommended treatment is with __________.

"tobacco smoke is responsible for what percentage of lung cancer deaths?"

How can you determine if your cardiovascular system is becoming more fit?

The dorsal fin of a shark is _____ to the dorsal fin of a dolphin. this anatomical feature is the result of convergent evolution (i.e., adaptation to similar environmental pressures).

Normal fruit flies have brownish-yellow bodies, and this body color is dominant. a mutation in the gene for body color can produce flies with an ebony body color. a homozygous normal fruit fly (e
e. is crossed with a homozygous ebony fruit fly (ee). what is the predicted outcome of this genetic cross

Explain why lightning strikes can be dangerous even when an individual is not directly struck

Species are disappearing almost a thousand times faster than they are forming. What is the main cause?

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A volcanic eruption adds carbon dioxide to the air. This is an example of interactions between the


1)

atmosphere and geosphere


2)

hydrosphere and geosphere


3)

hydrosphere and biosphere


4)

geosphere and biosphere

A large explosion that takes place at the end of a star’s life cycle is called a ____________.
big bang
supernova
nebula
nuclear reaction

What is the leading cause of water pollution in the United States?

About _______ of all body fluid is within cells and intracellular compartments. A. 1/3 B. 2/3 C. 1/2 D. 1/4

A student is asked to draw a food web in which the same organism is a primary consumer as well as a secondary consumer. how should the organism be represented in the food web?
a. the organism must have an arrow pointing from it to a tertiary consumer and another arrow pointed from it to a decomposer.
b. the organism must have an arrow pointing from it to a secondary consumer and another arrow pointing to it from the top predator.
c. the organism must have an arrow pointing to it from a producer and another arrow pointing to it from a primary consumer.
d. the organism must have an arrow pointing from it to primary consumer and another arrow pointing away from it to a decomposer.

Name the muscular contractions that force the food downwards

Which of these organizations acknowledges that the threat to wildlife and biodiversity is greater today than ever before ?
A. Convention on biological diversity
B. The fans at convention
C. World trade organization
D. Convention on international trade in endangered species

an energy pyramid illustrates that energy is a form of _____is lost to the surrounding as it is passed from one organism to the next???

What is the process within a genetic algorithm of randomly trying combinations and evaluating the success (or failure) of the outcome?

Select the correct definition about tissue grafts.
a. allografts are between different species.
b. xenografts are between individuals of the same species.
c. isografts are between identical twins.
d. autografts are between two genetically identical individuals.

If a space in the structure is filled with minerals and then the original animal or plant part dissolves it called

Definition: this is the process of organisms adapting to their environments over time.

Cleavage as part of embryonic development is distinctive because it involves ________.

Todd was startled when the door slammed shut. what part of the brainstem is responsible? todd was startled when the door slammed shut. what part of the brainstem is responsible? thalamus medulla midbrain pons

Which type of vaccines triggers the recipient's immune system to produce antitoxins?

In an aquatic habitat, an example of organisms from the pioneer community would be - f water reeds g algae h water lilies j grass

What does the presence of similar genes in very dissimilar organisms imply? a the organisms do not share a common ancestor. b the genes became identical through mutation. c they must be in the same family. d the organisms share a common ancestor?