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melomori [17]
3 years ago
13

Which principles help geologists compare the timing of the origin of life forms and the timing of their extinction?

Chemistry
2 answers:
Assoli18 [71]3 years ago
8 0

Absolute dating is the process of determining an age on a specified chronology in archaeology and geology. Some scientists prefer the terms chronometric or calendar dating, as use of the word "absolute" implies an unwarranted certainty of accuracy.

faltersainse [42]3 years ago
4 0
Relative dating<span> is the science of determining the relative order of past events (i.e., the age of an object in comparison to another), without necessarily determining their </span>absolute age<span>, (i.e. estimated age). In geology, </span>rock<span> or </span>superficial deposits<span>, </span>fossils<span> and </span>lithologies<span> can be used to correlate one </span>stratigraphic column<span> with another. Prior to the discovery of </span>radiometric dating<span> which provided a means of </span>absolute dating<span> in the early 20th century, </span>archaeologists<span> and </span>geologists<span> used this technique to </span>determine ages<span> of materials. Though relative dating can only determine the </span>sequential order<span> in which a series of events occurred, not </span>when<span> they occur, it remains a useful technique especially in radiometric dating. Relative dating by </span>biostratigraphy<span> is the preferred method in </span>paleontology<span>, and is in some respects more accurate (Stanley, 167–69). The </span>Law of Superposition<span>, which states that older layers will be deeper in a site than more recent layers, was the summary outcome of 'relative dating' as observed in geology from the 17th century to the early 20th century.</span>
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At what point is base no longer added during a titration
maria [59]
When you doing a titration, you need to use an indicator to confirm whether the reaction is completed. When the indicator has the color change and will not change back in one minute, the reaction is finished and you don't need to add more.
8 0
3 years ago
If I use the dropper to add 10 mL of drink mix to 50 mL of water, what is the
Yuliya22 [10]

Answer:

16.7%

Explanation:

From the question given above, the following data were obtained:

Volume of drink mix = 10 mL

Volume of water = 50 mL

Percentage of drink mix =?

Next, we shall determine the total volume of the solution. This can be obtained as follow:

Volume of drink mix = 10 mL

Volume of water = 50 mL

Total volume of solution =?

Total volume of solution = (Volume of drink mix) + (Volume of water)

Total volume of solution = 10 + 50

Total volume of solution = 60 mL

Finally, we shall determine the percentage of the drink mix in the solution. This can be obtained as follow:

Volume of drink mix = 10 mL

Total volume of solution = 60 mL

Percentage of drink mix =?

Percentage of drink mix = Vol. of drink mix / total volume × 100

Percentage of drink mix = 10/60 × 100

Percentage of drink mix = 16.7%

4 0
3 years ago
HELPPPP STILLLL!!!! SCIENCE!!!!
Vadim26 [7]

Answer: the third one

Explanation:

4 0
3 years ago
An alkyne with the molecular formula C5H8 was reduced with H2 and Lindlar's catalyst. Hydroboration-oxidation of the resulting a
irinina [24]

Since the addition of the H2O in the last step of hydroboration is anti-Markovnikov, the starting material is 1-pentyne.

The addition of H2 to C5H8 yields an alkene when a Lindlar catalyst is used. Recall that the Lindlar catalysts poisons the process so that the addition do not go on to produce an alkane.

When hydroboration is carried out on the alkene, we are told that a primary alcohol was obtained. We must note that in the last step of hydroboration, water is added in an anti- Markovnikov manner to yield the primary alcohol. Hence, the starting material must be 1-pentyne as shown in the image attached.

Learn more: brainly.com/question/2510654

6 0
3 years ago
Please help me solve these problems, thanks!
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There is no picture
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