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siniylev [52]
4 years ago
12

When we think about the carbon cycle and human activities, it is important to differentiate between facts and hypotheses. Which

of the following is NOT a fact, but is a hypothesis? A. The amount of carbon dioxide in the atmosphere has increased since 1950. B. Increasing atmospheric carbon dioxide will cause mean global temperature to increase by 2 degrees Celsius over the next century. C. The burning of fossil fuels contributes substantially to the ongoing rise of atmospheric CO2. D. In the past, atmospheric CO2 levels reached levels higher than those observed today.
Chemistry
1 answer:
saw5 [17]4 years ago
4 0

Answer:

B. Increasing atmospheric carbon dioxide will cause mean global temperature to increase by 2 degrees Celsius over the next century.

Explanation:

By definition, a hypothesis is a tentative statement or prediction with little or no experimental test. Hypotheses are always formulated such that they can be rejected if experimental findings are against them.

Hypotheses are predictive and as such, the tone is often in future tense.

<em>From the available options, only option B sound predictive of what might happen in the future. </em>

Hence, the correct option is B.

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Choose your favorite super hero that gained their powers from radiation. What
dmitriy555 [2]

Answer:

Copy and paste "Electromagnetic waves are categorized according to their frequency f or, equivalently, according to their wavelength λ = c/f.  Visible light has a wavelength range from ~400 nm to ~700 nm.  Violet light has a wavelength of ~400 nm, and a frequency of ~7.5*1014 Hz.  Red light has a wavelength of ~700 nm, and a frequency of ~4.3*1014 Hz." into google, and the correct website pops up as the first result.

Explanation:

I tried to link the website that I use to convert wavelengths and frequencies into types of light, but it deleted my answer, so I guess we're doing it this way. As for converting the wavelength to energy, the same principles apply as before:

Frequency: ν       Wavelength: λ       Energy: E       Speed of light: C (3.00e8)       Planck's Constant: h (6.626e-34)

ν -> λ    λ = C/ν

λ -> ν    ν = C/λ

For either of these equations, wavelength must be converted to meters or nanometers, depending on the equation.

For ν -> λ, after doing the equation, convert the wavelength into nanometers by dividing by 1e-9.

For converting λ -> ν, convert the wavelength into meters by multiplying by 1e-9.

For energy: E = hν = hc/λ

6 0
3 years ago
Mendeleev noticed that properties of elements usually repeated at regular intervals when the elements were arranged in order of
Alex_Xolod [135]

Properties of elements usually repeated at regular intervals when the elements were arranged in order of increasing Atomic mass.

The properties of elements are a periodic function of their atomic masses. Mendeleev found that when elements are arranged in the order of increasing atomic mass ,the elements with similar properties occur at regular intervals. Mendeleev's periodic table means that if elements are arranged in the  order of increasing atomic masses then the properties of elements are repeated after regular intervals or period. He arranged 63 elements in the order of increasing atomic masses in horizontal row  but in such a way that elements having similar  properties came directly under one another in the same vertical columns or groups.  

To learn more about Mendeleev's Periodic table please visit:

brainly.com/question/9891527

#SPJ4

5 0
2 years ago
Is this true or false ?
stiks02 [169]

Answer:

false

Explanation:

The atom model has changed over time because of the discovery of subatomic particles

7 0
3 years ago
Read 2 more answers
How many neutrons does element ex have if it's atomic number is 58 and it's mass numbers 156
MariettaO [177]
It would have 98 neutrons.

Explanation:
The formula for finding neutrons when given the atomic number and the mass is to do (mass - atomic number.) In this case, the mass is 156 and the atomic number is 58. So we subtract 156 - 58, which gives us 98. Therefore, it would have 98 neutrons.
4 0
3 years ago
Why a lithium atom forms a + 1 ion and an oxygen atom forms -2 ion? Please really urgent thanks
ahrayia [7]
Lithium forms a +1 ion because it loses one electron, making the ratio of electrons:protons unbalanced by losing one electron. the ratio is now 2e:3p.

Oxygen forms a -2 ion because of a different reason. It gains 2 electrons rather than losing them.
4 0
3 years ago
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