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
Burka [1]
3 years ago
15

After the three days, what happens in each test tube? why? what is necessary for rust to occur? how does this activity demonstra

te the fate of oxygen in earthâs early atmosphere, when iron in the oceans was still removing oxygen from the air?
Biology
1 answer:
Finger [1]3 years ago
4 0
The situation would be that, in a sealed tube,  there are 3 to 4 nails inside and a certain amount of calcium chloride was added. After three days, there will be no changes to be observed in the first tube since the oxygen is not enough to initiate a change and there is no presence of water. For the second test, the same situation is made but boiling water was filled in the tube. For this, no changes would still be observed since there is no moisture. For the last test, the same situation as the first but it is filled halfway with water. After 3 days, rust would be observed on the nails. In order for rust to happen, there should be water and oxygen. The oxygen in the early atmosphere of the Earth would react with iron present in the oceans thus producing iron ores.
You might be interested in
The pine cone seed is the:
lesya692 [45]
<span>(C) container for the fertilized egg

Hope this helps!</span>
8 0
3 years ago
Which substances are responsible for accelerating chemical reactions in cells? amino acids enzymes nucleic acids lipids
Liono4ka [1.6K]
Enzymes are biological catalysts that speed up reactions
3 0
3 years ago
Read 2 more answers
A nurse leader wants to implement the principle of non-maleficence while evaluating the staff. what is an effective way to perfo
Harlamova29_29 [7]
To create a positive environment can help implement the principle of non-maleficence as well as guaranteeing that bullying or diminishing does not take place. When important decisions are to be made they should be shared with everyone trying to make the information accessible to everyone equally.
6 0
3 years ago
Read 2 more answers
What does bone consist of?
MrRa [10]

mostly collagen and some calcium phosphate

4 0
3 years ago
Assume that a certain prokaryote is shaped like a ball, lives deep under the water on the ocean floor, and consumes dead organis
natulia [17]
That prokaryote is <span>Psychrophile, a coccus and a decomposer.

1)The prokaryote is</span> shaped like a ball or generally has a round shape so it's called a coccus (Cocci in plural). This is one out of three terms, that are used to name bacteria. The other ones are bacillus and spiral. For example, Staphylococcus aureus is a bacteria that has a round shape but it's formed by more that one ball, that together look like a bunch of grapes.

2) This organism lives deep under the water, so it's named as a psychrophile or cryophile. This means they can live and reproduction at extremely low temperatures(-20ºC), and some places with those temperatures are the polar regions and the deep sea.

3) This prokaryote consumes dead organisms so it's classified as a decomposer.
Decomposers are organisms that can break down dead or decaying organisms. The process is an essential part of the nutrient cycle and is important for recycling the organic matter that occupies space in the biosphere.
6 0
3 years ago
Other questions:
  • Ozone is know to cause respiratory problems in humans and damage plants. However, the ozone layer provides protection for Earth.
    11·1 answer
  • What mineral deposit is the reason parts of micronesia have had jungle cover removed?
    13·1 answer
  • Hormones are secreted and released into the blood by _____. select one:
    14·1 answer
  • why is gene regulation necessary in the development of multicellular organisms? Use a specific example to support your argument.
    13·1 answer
  • What are the causes of sea levels rising?
    7·1 answer
  • 1. Five students in your class always sit together in the front row. This could be because (A) they really like each other or (B
    11·2 answers
  • The image depicts the anatomical structure of the forelimb of a dolphin and a bat, both mammals. Which hypotheses are consistent
    6·1 answer
  • An airplane flying at a velocity of 610 m/s lands and comes to a complete stop over a 53 second period. a. Did this airplane spe
    15·2 answers
  • When Mendel crossed true-breeding tall pea plants with true-breeding short pea plants, all the offspring were tall. Then he allo
    5·1 answer
  • The shorter the wavelength the higher the frequency.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!