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
Art [367]
4 years ago
12

1. How did people 1st map the ocean floor?

Biology
2 answers:
agasfer [191]4 years ago
4 0

Answer:

used sound waves that bounced off the ocean bottom. the time taken for the sound to travel through the ocean and back is then used to calculate water depths

PtichkaEL [24]4 years ago
3 0

Echo sounding is the key method scientists use to map the seafloor today. The technique, first used by German scientists in the early 20th century, uses sound waves bounced off the ocean bottom. ... The time taken for the sound to travel through the ocean and back is then used to calculate water depths.

You might be interested in
What is the function of the hormone erythropoietin?
xxTIMURxx [149]

Answer:

stimulates production of red blood cells is a correct answer.

Explanation:

function of the hormone erythropoietin: stimulates production of red blood cells

Erythropoietin hormone is produced by the kidney and its function is to promotes or support the formation of the red blood cells and to provide protection to the cells from the destruction.

Erythropoietin hormone stimulates the bone marrow to produce red blood cells and the function of the red blood cells is to transport oxygen to the body.

4 0
3 years ago
Which substance is a pure substance? Cereal Silver Jelly bean Shampoo
Kisachek [45]
Silver is a pure substance 
3 0
3 years ago
Read 2 more answers
2. Which of the following describes the difference between nitrogen-14 and nitrogen-15? (1 point) Nitrogen-14 has 14 electrons,
lozanna [386]
The statement that describes the difference between the 2 isotopes of nitrogen would be the last set.

Nitrogen-14 has 7 electrons, 7 protons, and 7 neutrons

Nitrogen-15 has 7 electrons, 7 protons, and 8 neutrons.
4 0
3 years ago
Read 2 more answers
In humans, attached earlobes are recessive to free hanging earlobs. If two heterozygous free lobed parents mate, what is the cha
scoundrel [369]
Bellow I attached the punnet square you need. From it you can see, that the likelihood of producing an offspring with attached earlobes is 25% (ff)

7 0
3 years ago
Describe the structure of atoms,including the masses, electrical charges, and locations of protons, neutrons and electrons.
Lana71 [14]

Everything on earth is made up of a fundamental particles that is impossible to see with the naked eye this particle is called the atom. There a over a 100 atoms or more in science. At the center of the atom is the nucleus which contains protons and neutrons. Electrons can be found moving around the orbitals or energy levels , while most of the area outside the nucleus is empty space .

Most of the mass of an atom is concentrated at the center of the nucleus.

Atoms are made up of three subatomic particles called

1. Protons

2. Neurons

3. Electrons

protons - has positively charge particles with a charge

of +1

Neutrons- has no charge it is neutral, 0 charge.

Electrons- has a negative charge particles with an charge of -1.

Relative mass of a particle is the mass compared to the mass of a proton

Relative charge of a particle is the charge compared to the charge on a proton.

7 0
4 years ago
Other questions:
  • Which biomolecule is the cell wall made of?
    11·1 answer
  • given a container of a solution of 5% hcl all samples tested from this same bottle will have the same mass ratio of hydrogen to
    15·1 answer
  • Which of the following is true of anabolic reactions? View Available Hint(s) Which of the following is true of anabolic reaction
    9·1 answer
  • The tropic of cancer and the arctic circle are examples of locations determined by:
    13·1 answer
  • What are genotypes.
    13·2 answers
  • Which codon Is the code for the amino acid serine(Ser)
    12·1 answer
  • Pls help me I don't understand this​
    8·1 answer
  • This biome is also called boreal forest, vegetation is composed primarily 1 point
    9·1 answer
  • HELP ME
    7·1 answer
  • A student sets four bricks in sunlight as shown below which brick will get the hottest?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!