answer.
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
Tom
5 days ago
7

How have scientists determined the earth's core is composed of iron and nickel?

Biology
1 answer:
-BARSIC- [1.9K]5 days ago
8 0
<span>The accurate option from the available choices is: "Scientists have identified Earth's core composition through radiometric dating by analyzing meteorites".
</span><span>To date materials, radiometric dating or radioactive dating procedures are utilized, such as for rocks or carbon, where trace radioactive elements were specifically incorporated when formed. The method examines the ratio of naturally occurring radioactive isotopes in the material to the quantities of their decay products, which form at a consistent decay rate.</span>
You might be interested in
Again, look at the table. Examine the saturated thickness levels between 1975 and 1990 and between 1995 and 2010. Each of these
11111nata11111 [1806]
Saturated thickness refers to the volume of water held in an aquifer that is defined by hydrogeological characteristics. The aquifer's rock contains pores filled with water, which adds to the total water volume in the aquifer. The saturated thickness decreased from 32.77m in 1975 to 22.48m in 1990, reflecting a reduction of 10.29m. Similarly, between 1995 and 2010, the thickness diminished from 25.08m to 12.27m, a decrease of 12.81m. Although the population did not change significantly from 1975 to 1990, the notable drop in saturated thickness from 1995 to 2010 could be attributed to water conservation efforts adopted by the community or natural factors such as sufficient rainfall revitalizing the aquifer and contributions from nearby water bodies like rivers, lakes, and ponds. Conservation measures include wastewater recycling and reducing water loss.
3 0
27 days ago
Read 2 more answers
Typical household bleach has a pH of 13. What is the H3O+ concentration in household bleach?
lana [1794]

Answer: 1.0, -13

Explanation:

4 0
1 month ago
Read 2 more answers
Convert enzyme concentrations of 2.5%, 5.0%, and 10% to ppt units.
lana [1794]

Answer:

2.5 x 10¹⁰ ppt

5.0 x 10¹⁰ ppt

1.0 x 10¹¹ ppt

Explanation:

The term ppt denotes parts per trillion, meaning how many parts of the enzyme are present in 1 trillion parts. Percentage denotes the number of parts per 100 units. To convert the provided values from percentage to ppt:

\frac{2.5}{100}=\frac{a}{1,000,000,000,000}\\a=2.5 *10^{10}\ ppt\\\\\frac{5.0}{100}=\frac{b}{1,000,000,000,000}\\b=5.0 *10^{10}\ ppt\\\\\frac{10}{100}=\frac{c}{1,000,000,000,000}\\c=1*10^{11}\ ppt

The concentrations in ppt are:

2.5 x 10¹⁰ ppt

5.0 x 10¹⁰ ppt

1.0 x 10¹¹ ppt

7 0
1 month ago
What are the differences in the internal structures of the cells pictured to the right? Check all that apply. There are fewer st
Tresset [1663]

The accurate observation is that the upper cell contains fewer structures while the structures present are comparable.

8 0
17 days ago
The type of plant cell that provides support without interfering with growth and is familiar as the "strings in celery" is a
lana [1794]
Une cellule végétale qui apporte un soutien sans entraver la croissance, souvent reconnue sous le terme de "fibres dans le céleri", est appelée une cellule collenchyme.
7 0
1 month ago
Other questions:
  • Drag and drop the appropriate labels into position to explain how this defect might cause mr. g's other problems.
    11·1 answer
  • Which of the following statements about glucose, galactose, and fructose is most likely true?
    10·2 answers
  • Matt suffered slight burns in an accident. When the skin burns, it loses some of its functions. First-degree burns affect the to
    14·2 answers
  • Write a hypothesis for Section 1 of the lab, which is about the effect the type of material has on the absorption of sunlight on
    15·2 answers
  • Lawmakers discuss methods of preventing pollutants that could directly start a positive feedback loop in the area shown in the p
    8·1 answer
  • Auditory cortex is to the _____ lobe as _____ cortex is to the occipital lobe
    14·1 answer
  • The m phase of mitosis and m phase of meiosis both occur after interphase. however, the two processes differ in the arrangement
    11·1 answer
  • Sometimes a suffix functions independently as a medical term. give two examples of suffixes that are also terms, and explain how
    13·1 answer
  • Cells in a large multicellular organism communicate with each other by chemical signals. These signals are passed from one cell
    13·2 answers
  • A scientific explanation states that plants produce carbohydrates through the process of photosynthesis and that photosynthesis
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!