What causes the earths crust to spread

Answers

Answer 1
Answer:

Answer: Seafloor and tectonic plates.

Explanation: Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor


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Name and Title:Include your name, instructor's name, date, and name of lab.


Objectives(s):

In your own words, what is the purpose of this lab?


Hypothesis:

In this section, please include the predictions you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.


Procedure:

The materials and procedures are listed in your virtual lab. You do not need to repeat them here. However, you should note if you experienced any errors or other factors that might affect your outcome. Using your summary questions at the end of your virtual lab activity, please clearly define the dependent and independent variables of the experiment.


Data:

Record the elements present in each unknown astronomical object. Be sure to indicate “yes” or “no” for each element.

Hydrogen Helium Lithium Sodium Carbon Nitrogen
Moon One












Moon Two












Planet One












Planet Two













Conclusion:

Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.

Using two to three sentences, summarize what you investigated and observed in this lab.
Astronomers use a wide variety of technology to explore space and the electromagnetic spectrum; why do you believe it is essential to use many types of equipment when studying space?
If carbon was the most common element found in the moons and planets, what element is missing that would make them similar to Earth? Explain why. (Hint: Think about the carbon cycle.)
We know that the electromagnetic spectrum uses wavelengths and frequencies to determine a lot about outer space. How does it help us find out the make-up of stars?
Why might it be useful to determine the elements that a planet or moon is made up of?

Answers

this seems like a class project
i support that frfr

What is formed when two atoms of bromine bond together?(1) a monatomic molecule
(2) a diatomic molecule
(3) a heterogeneous mixture
(4) a homogeneous mixture

Gold can be flattened into an extremely thin sheet. The malleability of gold is due to the
(1) radioactive decay mode of the isotope Au-198
(2) proton-to-neutron ratio in an atom of gold
(3) nature of the bonds between gold atoms
(4) reactivity of gold atoms

Answers

Question One:
(2) A diatomic molecule

Question two:
(3) nature of bonds between gold atoms

More on question two:
Gold and metals in general are malleable because of the so called "sea of valence electrons", which is generally unstable allowing it to be malleable and conductive.
The answer for question 1 is (2) diatomic molecule.

The answer for question 2 is (3) nature of bonds

Helium does not usually react with other substances. Does this mean that helium has no chemical properties? Please explain.

Answers

The electron "shell" (or orbitals) for helium is full with two electrons. It, like hydrogen, follows the duet rule. This means that it is "happy" and not very reactive once it has two elections in its shell. For helium, it is inert (doesn't react, no chemical properties) if it keeps the electrons in its shell. If, however, one were to remove an electron (ionize it) the atom would be helium, as it has 2 protons, but would react with elements that have 1 valence electron in order to get the full shell. This is VERY uncommon simply because it takes a great amount of energy to remove the electron the process is not very useful. The answer to your question is essentially, no like other noble gases, helium does not have chemical properties.

Final answer:

Though helium doesn't usually react with other substances due to its full electron shell, it doesn't mean it lacks chemical properties. Properties like atomic number, atomic mass, density, and reactivity are its chemical properties.

Explanation:

The statement that helium does not usually react with other substances  is correct. This is due to helium being a noble gas with a complete set of electrons in its outer shell, making it stable and unlikely to participate in chemical reactions. However, this does not mean it has no chemical properties. Properties such as atomic number, atomic mass, density, and the inability to react or bond with other elements are indeed chemical properties.

Learn more about Helium here:

brainly.com/question/36343751

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Explain why animals must eat food, but plants do not have to.

Answers

Plants do eat food. They get the food through a process called photosynthesis. In this process,  plants take carbon dioxide (the air we breathe out), water, and other nutrients, then uses sunlight to cocmbine these to make sugar. (The sunlight is captured and stored within an organ only plants contain called chloroplasts).
Animals get energy by eating food. Plants get energy through photosynthesis, the process when plants turn sun into energy. 

HELP QUICK PLZ!!! What is the relationship between the structure of a substance and the properties of a substance? Explain.

Answers

Answer:

The bonding angle, the kind of bonds, the size of the molecule, and the interactions between molecules are all part of the chemical structure. Slight alterations in the chemical structure can have a significant impact on the compound's characteristics.

Explanation:

The bonding angle good luck

What is the Full form of LPG

Answers

Answer:

Liquefied petroleum gas

Answer:

Liquefied petroleum gas or liquid petroleum gas(LPG or LP gas),