1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
PilotLPTM [1.2K]
3 years ago
12

An unknown mineral scratches apatite and is scratched by corundum. What can you conclude about this mineral’s hardness?

Biology
2 answers:
Gala2k [10]3 years ago
8 0

If we guide ourselves with the Moh´s scale:

Material scratches apatite → material is harder than 5.

Material is scratched by corundum → material is softer than 9.

Conclusion:

The hardness of the unknown material stands between 5 and 9.

Note:  

Both apatite and corundum are defining materials (reference materials in the Moh´s scale). So, you can also give an answer using defining materials:

"It can either be an orthoclase feldspar, a quartz or a topaz".

Hope it helped,

BiologiaMagister

<u><em>This answer is dedicated to JaySL</em></u>

stiks02 [169]3 years ago
5 0

Answer:

the hardness is more than 2.5

Explanation:

You might be interested in
CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION THANK YOU!!
jenyasd209 [6]

Answer: ok

Explanation:

ok

4 0
3 years ago
The picture shows an organ system in the human body. What do these organs do in the human body?
olga2289 [7]

The organs represented in the image are the Brain, nerve, and spinal cords that monitor and react to changes in the body and its environment.

<h3>What are Organs?</h3>

Organs may be defined as an assemblage of tissues that structurally construct an operational unit specialized to accomplish a distinct operation and functions in the body of a living organism.

The nerves function in sending and receiving signals to the brain from external stimuli. They give the perception of feeling pain, relaxation, stress, etc to the brain according to the situations.

The complete question is as follows:

The picture shows an organ system in the human body.

Brain, Nerve, and spinal cord.

What do these organs do in the human body?

  • They filter pathogens and dead cells out of lymph before it returns to the blood.
  • They monitor and react to changes in the body and its environment.
  • They release hormones that control the activities of cells and organs.
  • They identify and destroy things that are foreign or harmful to the body.

Therefore, the correct option for this question is B, i.e. They monitor and react to changes in the body and its environment.

To learn more about Organs, refer to the link:

brainly.com/question/1126526

#SPJ1

5 0
1 year ago
Lenny came face-to-face with a young bear while hiking in the sierra nevada mountains. his sensory input traveled to his cerebra
DaniilM [7]

The sensory input initiated from the spinal cord before reaching to the brain . The information firstly goes to first order neuron where it receives impulses from skin and then transferred to the spinal cord.

Some sensory pathways consists of chain of neuron that transfer from receptor organ then to cerebral cortex that is responsible the perception of sensations. Sensory input is converted into electrical signals are known as nerve impulse.

This nerve impulse are transmitted into into brain. The correct order is Receptors - Sensory neuron- Spinal cord - Motor neuron- Muscle.

Impulse are the strong desire to act or that causes something to happen or happen more quickly.

To learn more about impulse here

brainly.com/question/16980676

#SPJ4

7 0
1 year ago
One function of a plant stem?
Nadya [2.5K]
One function of a plant stem is to transport water and nutrients from the roots to the other parts of the plant such as the leaves. 
Another important function of the plant stem, because of its structurally rigid design, is to support the rest of the plant's body.
Plant stems also serve in elevating the leaves of the plant so that they can have better access to sunlight.
I hope this helped!
5 0
3 years ago
Read 2 more answers
The peripheral nervous system affects __________ while the central nervous system is associated with _______________.
alexandr402 [8]
The peripheral nervous system controls your muscles and joints and it sends messages back to your brain. <span>It manages temperature and digestion too. The central nervous system controls the brain and the spine. </span>
8 0
2 years ago
Read 2 more answers
Other questions:
  • What do you think the organism is
    7·2 answers
  • What are biological macromolecules and how much energy can they provide
    11·1 answer
  • In order for an organism to survive, it must do what?
    10·2 answers
  • How is a secondary immune response different from a primary immune response?
    15·1 answer
  • Scientists can track the movement of proteins through the endomembrane system using an approach known as a pulse-chase experimen
    13·1 answer
  • Compare the modern Cell Theory to the original Cell Theory
    10·1 answer
  • Which of the following is produced by adding 1% to 5% agar to nutrient broth that is then boiled and cooled?
    7·2 answers
  • Genetic fingerprinting is a tool is used in
    7·1 answer
  • g Electron flow down the electron-transport chain leads to the transport of proteins: Group of answer choices from the matrix to
    14·1 answer
  • Please match these for me the last 2 are
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!