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
puteri [66]
3 years ago
10

Describe how to find the hardness of an unknown mineral.

Biology
2 answers:
BartSMP [9]3 years ago
6 0
For this you would require two specimens of the same nature. You take a normal hammer and a paper and pencil, and hit it gently and continue to hit it harder till it breaks, record the results.
dsp733 years ago
5 0
The scratch test.

The scratch test is used by scientists and people who study rocks and minerals to determine the strength of the rock. They have the scratchers numbered one through ten and scratch the rock or mineral until the scratcher makes a mark in the mineral then they know the strength of the rock.
You might be interested in
Covalent bonds are in the air you breathe and the water you drink. How are covalent bonds formed?
Agata [3.3K]
Covalent bonds are formed when two non metal atoms share an electron. The atoms either give up or gain an electron, due to the outer shell being unstable.
4 0
2 years ago
Which is an example of how bacteria help keep the environment clean?<<<
Assoli18 [71]

cleaning oil spills, cleaning pollution and generating electricity, metabolising methane into methanol, converting newspaper to biofuel and treating depression to anciety.

hope some of my information helped



8 0
3 years ago
State the major processes of the urinary system and describe the activity of each process.
Dennis_Churaev [7]

Answer:

The urinary system removes excess substances and waste products from the metabolism from the body through the urine, contributing to the maintenance of homeostasis, the chemical composition of the internal environment. Urine is produced in the kidneys, passes through the ureters to the bladder, where it is stored and is released into the exterior through the urethra.

The kidneys perform the main work of the urinary system comparing with the other parts of the system, acting primarily as passageways and storage areas. With the filtration of blood and the formation of urine, the kidneys contribute to homeostasis of body fluids in a number of ways, such as: Regulation of the ionic composition of blood; Maintenance of blood osmolarity; Regulation of blood volume; Blood pressure regulation; PH regulation of blood; Hormone release; Regulation of blood glucose level; Waste excretion and toxic substances.

Ureters - They are two tubes that carry urine from the kidneys to the bladder. The ureters are capable of performing rhythmic contractions called peristalsis. Urine moves along the ureters in response to gravity and peristalsis.

Bladder - The urinary bladder acts as a temporary reservoir for urine storage. It is a hollow, elastic muscular organ that in men is directly anterior to the rectum and in women, is located in front of the vagina and below the uterus.

Urethra - is a tube that conducts urine from the bladder to the outside, being lined with mucosa that contains a large amount of mucus-secreting glands. The urethra opens outwards through the outer ostium of the urethra.

8 0
3 years ago
Simone is training for a swim race. How can she make sure she always trains at the same speed of 2 miles per hour? Check all tha
Kipish [7]

Answer:

B. Every point on the line is an equivalent ratio.

C. As the line goes up, the speed increases.

D. Simone can pick any ratio on the line and she will be swimming at a rate of 2 mph.

Explanation:

If the line on the graph has equivalent ratio, it shows that the Simone swim at the speed of 2 mph. If the line on the graph goes up , it means the speed of swimming increases while when the line on the graph goes down, the swimming speed decreases so maintaining the speed of 2 mph, the line have to go horizontally in straight line. If Simone can pick any ratio on the line present on the graph so she has to swimming at a rate of 2 mph.

5 0
3 years ago
State one advantage for a person with diabetes to receive genetically engineered insulin rather than insulin taken from a horse
dimaraw [331]
<span>Genetically engineered insulin is a synthetic human insulin manufactured from DNA sources in laboratory. One advantage of using genetically engineered insulin is that it causes fewer allergic reactions as compared to animal insulin. </span>
8 0
3 years ago
Read 2 more answers
Other questions:
  • The allele for brown hair (b) is dominant to the allele for blonde hair (b). if a man with brown hair and a woman with blonde ha
    13·1 answer
  • Phantom limb sensations and other experiences of amputees show that the brain can produce _____ in the absence of normal sensory
    7·1 answer
  • Do bacterial cell membranes have cholesterol
    12·1 answer
  • How does gravity keep the moon in orbit
    13·2 answers
  • Which of the following is characteristic of a parallel circuit?
    11·2 answers
  • Which female is most probably the<br> mother?
    7·1 answer
  • jenny measures the outside temperature as 16 degrees celcius,61 degrees Fahrenheit. she observes precipitation falling from the
    12·2 answers
  • Which is not a function of proteins?
    11·1 answer
  • A researcher is curious if Bt resistant bollworms are susceptible to an insecticide called DDT. Bollworms susceptible to Bt have
    11·1 answer
  • Match the number to the organ in the correct order to match the flow of air in and out of the respiratory system.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!