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
Andreyy89
2 years ago
8

Which wold tell you for sure if you had a sample of real gold​

Biology
2 answers:
Advocard [28]2 years ago
5 0

To perform this test to check if gold is real, make a light, tiny scratch on the item using a small nail file. Choose a spot that is not noticeable if possible. Use a dropper to apply a small drop of nitric acid to the scratch. If there is no reaction, then the piece is probably made from real gold.

Nesterboy [21]2 years ago
3 0

Answer:

Choose a spot that is not noticeable if possible. Use a dropper to apply a small drop of nitric acid to the scratch. If there is no reaction, then the piece is probably made from real gold.

Explanation:

You might be interested in
What is the cocoon in the lifecycle of silkworm?​
nignag [31]

Answer:

A cocoon is a protective casing that protects and shelters the silkworm while its transitioning from predators and other threats. Within the cocoon the silkworm transitions into a pupa, the pups is the stage between the larvae and adult moth. After two weeks the pupa finishes it's transition into a moth.

6 0
3 years ago
What ideas in Lyell's theory of uniformitarianism were important for evolutionary theory?<br>​
IgorLugansk [536]
He inferred that similar changes had happened in the past. Uniformitarianism combines the idea of gradual change over time with Lyell's observations that such changes have occurred at a constant rate and are ongoing.
8 0
3 years ago
Which reason best explains why the cell membrane helps the cell maintain homeostasis
Liula [17]

Answer:

Homeostasis involves maintaining a balance of several factors that make a cell healthy.

Explanation:

The cell membrane is a lipid bilayer that prevents that passage of water and ions. This allows cells to maintain a higher concentration of sodium ions out the outside of the cell.

7 0
3 years ago
2. What evidence was found to support the different parts of cell theory?
lukranit [14]

Answer:

The invention of the electron microscope allowed them to see organelles and other structures smaller than cells. There is variation in cells, but all cells have a plasma membrane, cytoplasm, ribosomes, and DNA. These similarities show that all life on Earth has a common ancestor in the distant past

4 0
2 years ago
What characteristics of the lower mantle causes it to contain more liquid than sections in the upper mantle?
masya89 [10]

Answer:

hgoips hehe lol

Explanation:

5 0
2 years ago
Other questions:
  • As Darwin was developing his ideas about evoution, he applied ideas from many fields, including geology, economics, and biology.
    9·1 answer
  • What is the outcome when a cell undergoes meiosis
    15·2 answers
  • Sections of the digestive system type of break down what its being broken down to what is being absorbed
    5·1 answer
  • An important group of polymers called thermosetting plastics forms a network structure by means of covalent bonds between the ch
    7·1 answer
  • Which scientific skill involves sharing what you have learned with others
    6·1 answer
  • What happens when sunlight bends as it passes through a prism? UV rays start appearing blue. White light becomes invisible. Infr
    11·1 answer
  • 1. Which of the following can be used to measure the rate of photosynthesis?
    13·2 answers
  • Which of the biogeochemical cycles can impact all of the others the most directly?
    6·1 answer
  • The diagram shows an experiment on the digestion of the protein in egg albumen by protease.
    5·1 answer
  • Which is NOT a type of
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!