Which mineral(s) have a black (or greenish-black) streak? Check all that apply.

sulfur

quartz

magnetite

pyrite

Answers

Answer 1

Answer:

Magnetite and pyrite

Explanation:

Their streaks are black

Answer 2

Magnetite is a mineral with an extremely high iron content. Magnetite is black or brownish-red with a black streak.

Magnetite  - black

Pyrite -- greenish to brownish black.

What is so special about magnetite?Magnetite is a mineral with an extremely high iron content. Magnetite is black or brownish-red with a black streak. On the Mohs hardness scale, it has a hardness of about 6.Magnetite is most commonly used as an iron ore in the production of steel. Other uses include using it as a catalyst in the Haber process to produce ammonia, as a pigment in paints and ceramics, and as magnetic micro- and nanoparticles in a variety of processes and materials.Magnetite is an abundant raw material found in the Mountains and Mountains Caves, as well as the Jellyshroom Cave and Lost River.

To learn more about : Magnetite

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Related Questions

Write a title for each step of primary

succession

Answers

Answer:

The labels I-VII represent the different stages of primary succession. I-bare rocks, II-pioneers (mosses, lichen, algae, fungi), III-annual herbaceous plants, IV-perennial herbaceous plants and grasses, V-shrubs, VI-shade intolerant trees, VII-shade tolerant trees.

Why are leaves green:

Answers

Chlorophyll gives leaves their green color.

the oceans lower atmosphere and contitents are the part of

Answers

Answer:

The oceans, lower atmosphere and contitents are the part of the Biosphere.

PLS HELP ILL GIVE BRAILYEST AND 100PTSPLS HELP ME
Select the correct location on the image.
Where is the protective covering of the axon?

Answers

Myelin the orange extended region

Answer: myelin sheath

Explanation:

The axon is covered by a myelin sheath. The axon passes information to the next neuron or other cell in the body. A myelin sheath.

during the process of transcription in a eukaryote

Answers

mRNA is produced which caries the sequence to produce proteins

How does energy flow in an ecosystem

Answers

Answer:

Energy is passed from organisms at one trophic level or energy level to organisms in the next trophic level. Producers are always the first trophic level, herbivores the second, the carnivores that eat herbivores the third, and so on.

Hope this helps you !!

in all organisms, certain genes are expressed at any given time while other genes are not. both prokaryotes and eukaryotes regulate gene expression at the transcription stage. however, the greater complexity of eukaryotic cells makes it possible for gene expression to be regulated at many other stages as well. the diagram below shows different stages at which gene expression may be regulated in eukaryotes.

Answers

Answer:

The process of turning genes on and off is known as gene regulation. Gene regulation is an important part of normal development. Genes are turned on and off in different patterns during development to make a brain cell look and act different from a liver cell or a muscle cell, for examp

What would be the phenotype of a frog if yellow toes is dominant and the frogs genotype was Yy?
Yellow
Or
Not yellow

Answers

Yellow because if yellow toes is dominant and you have Yy then it will have yellow toes

1. Describe the flow of energy from the sun to a producer, like grass, and then to a consumer, like a rabbit. Type your answer here:

Answers

Explanation:

The Sun then provides energy to the grass through the process of photosynthesis. The rabbit eats the grass, and the rabbit absorbs its energy. Finally, the snake eats the rabbit, and it absorbs the rabbit's energy. Energy travels from the Sun and moves through the ecosystem with each consumer along the chain.

Where would you most likely find terrestrial communities with temperate deciduous forests?

Answers

Answer:

 

The correct answer is - C) Europe.

Explanation:

During respiration, most atp is formed as a direct result of the net movemnet of

Answers

Answer:

During respiration, most atp is formed as a direct result of the net movement of protons flowing through a channel

a zebra cell is just about to replicate its dna. what will happen first?

Answers

Answer:

The DNA unravels to make two strands.

I think this is the right answer

how are plant and animal cells similar in structure

Answers

Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes. Both also contain similar membranes, cytosol, and cytoskeletal elements.

Define the words condensation and evaporation.

Answers

Answer:

Condensation is the process through which the physical state of matter changes from the gaseous phase into the liquid phase.

Evaporation is the process through which the physical state of matter changes from the liquid phase to the gaseous phase.

explain the effect of germination on pea seed respiration

Answers

Answer:

"The affect of germination on the rate of cell respiration in peas is that in peas that are germinated, the rate of cell respiration is higher because the cells are growing/going through mitosis which requires energy/ATP in order to be carried out which is generated through the process of cellular respiration."

(Biology Cell Respiration Lab Flashcards | Quizlet)

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A mineral is defined as a natural substance that is neither animal nor plant, has a
A. specific composition and structure, and contains one or more silicon-oxygen tetrahedrons.
B. solid substance or element that is essential to human nutrition.
C. naturally occurring, crystalline, inorganic solid that contains only one element.
D. naturally occurring inorganic solid consisting of chemical elements in specific proportions, whose atoms are arranged in a repeated internal pattern.

Answers

Answer:

the answer is A. specific composition and structure, and contains one or more silicon-oxygen tetrahedrons.

Explanation:

cyber ethics and law are same in nature true or false​

Answers

Answer:

True as a technonerd it is ive study it

Explanation:

HELP ME PLS AND THANKS I DON"T KNOW THIS

Answers

Answer:

B :)

Explanation:

Answer:

Dichotomous means divided into two parts. That is why dichotomous keys always give two choices in each step. In each step, the user is presented with two statements based on characteristics of the organism. If the user makes the correct choice every time, the name of the organism will be revealed at the end.

Therefore, your answer is A.

Hope this helps! (please pick as brainlyist)

What organs help to complete digestion in the small intestine?

Answers

Answer:

The muscles of the small intestine mix food with digestive juices from the pancreas, liver, and intestine, and push the mixture forward for further digestion.

2 What is the function of proteins in the cell membrane?
F Facilitate the movement of particles across the cell membrane
G Receive chemical signals from other cells to begin a process in the cell
H Code for specific structures found in the cell membrane
J Create a hydrophobic layer that forms a barrier between the inside and outside of the cell

Answers

Answer is F: Facilitates the movement of particles across the cell membrane.

Types of proteins found in the cell membrane includes channel and carrier proteins, both which are involved in the process of facilitated diffusion where they help facilitate the movement of large or polar molecules across the membrane.

The voyage of the H.M.S Challenger was important because (1 point)
O it was a race won by Americans, to demonstrate superior sailing and ship building skills
O navigators were able to circumnavigate the globe for the first time in history, demonstrating celestial
navigation skills.
Ophysicists, chemists, and biologists conducted experiments and gathered collections that changed
exisisting scientific knowledge about the oceans.
O the first known data gathered about ocean currents and the Gulf Streams influence on weather were
documented by biologists and meteorologists.

Answers

Answer:

Physicists, chemists, and biologists, conducted experiments and gathered collections that changed exisisting scientific knowledge about the Oceans.

Explanation:

Trust in me

Oxygenated blood exits the heart ______________, whereas oxygenated blood enters the ______________ of the heart

Answers

left ventricleright atrium

Explanation:

How do scientists identify organisms that may have disease resistance genes?

Answers

Answer:

The use of genetic engineering in developing disease-resistant plants. The techniques of genetic engineering can be used to manipulate the genetic material of a cell in order to produce a new characteristic in an organism.

What functional group is found on the head end of a lipid molecule?
a. carboxyl group
b. amino group
X c.omega-3 fatty acid
d. glycerol

Answers

Answer:

Glycerol is a small organic molecule with three hydroxyl (OH) groups, while a fatty acid consists of a long hydrocarbon chain attached to a carboxyl group.

Explanation:

hope it helps

3. Hydrogen peroxide is used as an antiseptic to kill bacteria in cuts and abrasions. Many of these are catalase positive, yet they are still killed by the actions of hydrogen peroxide. Why does this occur

Answers

Answer: Hydrogen peroxide is used as an antiseptic to kill bacteria in cuts and abrasions. Many of these bacteria are catalase positive,

Explanation: that’s it

Which part of a neuron is most similar to other cells in the body?
dendrite
axon
glia
body

Answers

Answer:

D. The Cell Body

Explanation:

The cell body has genetic information, keeps the neuron's structure, and gives it the energy it needs to do things. A neuron's soma, like other cell bodies, has a nucleus and other special parts.

Answer:

it is the body

Explanation:

I took it and got it right have a nice day

What are two things that compose matter?

Answers

Answer:

All matter is made up of atoms, which are in turn made up of protons, neutrons and electrons. Atoms come together to form molecules, which are the building blocks for all types of matter. so it is like they all come together to make a group then they work together

Explanation:

What is a Objective Summary on Global Warming?

Answers

Answer:

Global warming is the long-term heating of Earth's climate system observed since the pre-industrial period (between 1850 and 1900) due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere.

Explanation:

Answer:

The study, published last month in the journal Geophysical Research Letters, found that climate change is making summers hotter and longer, while shrinking the three other seasons. ... They found that over the nearly 60-year period, summers grew from an average of 78 to 95 days long



What are the states of energy? List the Laws of Thermodynamics.

Answers

Answer:

The laws of thermodynamics define a group of physical quantities, such as temperature, energy, and entropy, that characterize thermodynamic systems in thermodynamic equilibrium.

Explanation:



What are the states of energy? List the Laws of Thermodynamics.
Answer: The first law, also known as Law of Conservation of Energy, states that energy cannot be created or destroyed in an isolated system. The second law of thermodynamics states that the entropy of any isolated system always increases.

Paragraph: Discuss the three laws of thermodynamics.
Key Points

The first law, also known as Law of Conservation of Energy, states that energy cannot be created or destroyed in an isolated system.
The second law of thermodynamics states that the entropy of any isolated system always increases.
The third law of thermodynamics states that the entropy of a system approaches a constant value as the temperature approaches absolute zero.
Terms

absolute zeroThe lowest temperature that is theoretically possible.
entropyA thermodynamic property that is the measure of a system’s thermal energy per unit of temperature that is unavailable for doing useful work.

System or Surroundings

In order to avoid confusion, scientists discuss thermodynamic values in reference to a system and its surroundings. Everything that is not a part of the system constitutes its surroundings. The system and surroundings are separated by a boundary. For example, if the system is one mole of a gas in a container, then the boundary is simply the inner wall of the container itself. Everything outside of the boundary is considered the surroundings, which would include the container itself.

The boundary must be clearly defined, so one can clearly say whether a given part of the world is in the system or in the surroundings. If matter is not able to pass across the boundary, then the system is said to be closed; otherwise, it is open. A closed system may still exchange energy with the surroundings unless the system is an isolated one, in which case neither matter nor energy can pass across the boundary.


A Thermodynamic SystemA diagram of a thermodynamic system
The First Law of Thermodynamics

The first law of thermodynamics, also known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another. For example, turning on a light would seem to produce energy; however, it is electrical energy that is converted.

A way of expressing the first law of thermodynamics is that any change in the internal energy (∆E) of a system is given by the sum of the heat (q) that flows across its boundaries and the work (w) done on the system by the surroundings:

Δ
E
=
q
+
w
Δ
E
=
q
+
w

This law says that there are two kinds of processes, heat and work, that can lead to a change in the internal energy of a system. Since both heat and work can be measured and quantified, this is the same as saying that any change in the energy of a system must result in a corresponding change in the energy of the surroundings outside the system. In other words, energy cannot be created or destroyed. If heat flows into a system or the surroundings do work on it, the internal energy increases and the sign of q and w are positive. Conversely, heat flow out of the system or work done by the system (on the surroundings) will be at the expense of the internal energy, and q and w will therefore be negative.

The Second Law of Thermodynamics

The second law of thermodynamics says that the entropy of any isolated system always increases. Isolated systems spontaneously evolve towards thermal equilibrium—the state of maximum entropy of the system. More simply put: the entropy of the universe (the ultimate isolated system) only increases and never decreases.

A simple way to think of the second law of thermodynamics is that a room, if not cleaned and tidied, will invariably become more messy and disorderly with time – regardless of how careful one is to keep it clean. When the room is cleaned, its entropy decreases, but the effort to clean it has resulted in an increase in entropy outside the room that exceeds the entropy lost.

The Third Law of Thermodynamics

The third law of thermodynamics states that the entropy of a system approaches a constant value as the temperature approaches absolute zero. The entropy of a system at absolute zero is typically zero, and in all cases is determined only by the number of different ground states it has. Specifically, the entropy of a pure crystalline substance (perfect order) at absolute zero temperature is zero. This statement holds true if the perfect crystal has only one state with minimum energy.

Energy flow in an ecosystem is best represented by _______.

Answers

Answer: Pyramids of biomass
Pyramids of biomass display the weight of organisms at each level. Inverted pyramids of biomass can occur when the primary producer has a high turnover rate. Pyramids of energy are usually upright and are the best representation of energy flow and ecosystem structure.
Your question: Energy flow in an ecosystem is best represented by _______.
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