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What do phytoplankton do for the carbon cycle? Choose all that apply.


A. They take in oxygen for photosynthesis.

B. They take in carbon dioxide for photosynthesis.

C. When they die, the carbon left in them can be sequestered (stored) in the ocean bottom.

D. They are food for many animals, including some whales.

Answers

Answer 1
B. Phytoplankton are responsible for most of the transfer of carbon dioxide from the atmosphere to the ocean. Carbon dioxide is consumed during photosynthesis, and the carbon is incorporated in the phytoplankton, just as carbon is stored in the wood and leaves of a tree.

Related Questions

which of the following CANNOT be classified as a substance? A. table salt B. air C. nitrogen D. gold

Answers

Answer:

C. Nitrogen

Explanation:

All of the other options are mixtures making them substances, but nitrogen is an element. (while gold is an element, there are often times that gold is mixed with other elements, creating a substance)


One difference between mixtures and pure substances is that
A)
mixtures can be physically separated.
B)
mixtures are made of one type of atom.
pure substances have no chemical bonds

D)
pure substances can be physically separated,
ning

Answers

Answer:

I think b but I could be wrong

Answer:

a

Explanation:

i just took it

Which is a property of barium (Ba)?
A. It does not conduct electricity.
B. It is brittle as a solid.
C. It rarely reacts with other elements.
D. It is very reactive.

Answers

Answer:

i think but i am not sure but according to me it mainly reacts yo non metals and i think its very reactive if my answer is wrong then comment below this question i will see it and i will get an opportunity to learn something new

how would you describe the size of atoms and molecules in your own words ?

Answers

Answer:

tomic size is the distance from the nucleus to the valence shell where the valence electrons are located. Atomic size is difficult to measure because it has no definite boundary. The electrons surrounding the nucleus exist in an electron cloud.

Explanation:

Answer:

Atomic size is the distance from the nucleus to the valence shell where the valence electrons are located. The separation that occurs because electrons have the same charge. The number of protons in the nucleus. The core electrons in an atom interfere with the attraction of the nucleus for the outermost electrons. and Molecular size is a measure of the area a molecule occupies in three-dimensional space. The amount of space any mass takes up in three-dimensional space is known specifically as its volume.

what is the first step when scaling a graph?

Answers

The first step when scaling a graph is to identify the variables. Hope it helps! :D

Answer: the lll newton law

Explanation:

it jus is

Jack, an Investigator, wants to prove that a certain suspect was present at the crime scene when the crime was committed. What kind of
evidence should he look for?


Jack should look for __________ evidence because the analysis of such evidence can prove whether the person was present when the crime
was being committed. This evidence refers to tiny fragments of material that can be transferred from a human to a human or human to a
location
(forensic science question)

Answers

Answer: TRACE evidence

Explanation: Any evidence that can be transferred from one person to another or one person to a place is trace evidence. Also I took the test.

Use the diagram to select the one true statement about the
rock layers
Use the following diagram to answer questions 3-6.
A. A occured after D
B. C is younger that B
C. C occured before D
D. A is older than B

Answers

Answer:

a is occured after d i think

A student measured the mass of some sodium chloride for a lab. the lab called for 6.25 g (the accurate measurement ) , but the student measured 6.00 g instead . what is the percent error for this mass ? Show your work .

Answers

Answer:

The answer is

[tex] \huge 4\%[/tex]

Explanation:

The percentage error of a certain measurement can be found by using the formula

[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]

From the question

actual mass = 6.25 g

error = 6.25 - 6 = 0.25

So we have

[tex]p(\%) = \frac{0.25}{6.25} \times 100[/tex]

We have the final answer as

4 %

Hope this helps you

which element is most likely to have an oxidation number of -2?

A. F
B. NE
C. CA
D. O

Answers

Answer:

D. O

_________________________________

F ----------¢ - 1

Ne --------¢ 0

Ca --------¢ + 2

Answer:

D. O

Explanation:

What is the equation for torque?

Answers

Answer:

greater

Explanation:

increase, for example a door handle. imagine how much force u need to open it if it was in the middle of the door? more u need.

According to the big bang theory, what was distributed in every direction as the universe expanded?

Answers

Answer: la masa porque a lo largo del tiempo se fueron creando planetas por todo el universo

Explanation:

When Juan got home from school, he noticed a foul smell coming from the kitchen. He decided to investigate the smell and found fruit sitting on the counter. There was evidence that a chemical reaction had occurred. When he looked at the fruit, he saw that it had turned brown and was soft to the touch. Write a short claim evedence and reasoning. If you could separate them it would be geat

Answers

Answer:

See explanation

Explanation:

A chemical reaction is said to have occurred when there is a permanent, irreversible change in a substance.

Considering the fruit in the question, the changes in the fruit can not be reversed. Nothing can ever be done to return the fruit to its original form. This ultimately shows that a chemical reaction has taken place.

Secondly, the occurrence of a chemical reaction can be confirmed by evolution of a gas. The foul smell that filled the kitchen is the gas evolved during the chemical reaction involving the rotten fruit.

Based on the article “Will the real atomic model please stand up?,” why did J.J. Thomson experiment with cathode ray tubes?

A. to specifically identify the nucleus as a separate part of an atom
B. to determine that electric beams in cathode ray tubes were actually made of particles
C. to prove John Dalton and Democritus wrong
D. to determine the exact energy output of cathode ray tubes

Answers

Answer:

B. to determine that electric beams in cathode ray tubes were actually made of particles

Explanation:

Answer:

B. to determine that electric beams in cathode ray tubes were actually made of particles

Explanation:

edg 2020

how much heat energy is required to melt 40g of sodium chloride at its melting point

Answers

Answer:

173.2 C

Explanation:

have a good day

21 kJ of heat are required to melt 40 g of sodium chloride at its melting point.

The standard enthalpy of fusion of NaCl is 0.52 kJ/g, that is, it takes 0.52 kJ of heat to melt 1 g of NaCl at its melting point. The heat required to melt 40 g of NaCl is:

[tex]40 g \times \frac{0.52kJ}{g} = 21 kJ[/tex]

21 kJ of heat are required to melt 40 g of sodium chloride at its melting point.

You can learn more about enthalpy of fusion here: https://brainly.com/question/10345467

how many valence electrons does hydrogen have

Answers

Answer:

one valence electron

Explanation:

Each hydrogen atom has one valence electron and is univalent.

A neutral atom of nitrogen has electrons in energy level(s):
Select one:
O a. 1 only
O b. 2 only
O c. 1 and 2
O d. 1, 2, and 3

Answers

Answer:

c

Explanation:

Nitrogen is in period 2, and has electrons in both 1 and 2.

The electron seeks to go up to energy level n = 2 from level 1, which is the initial energy level. Since the second energy level has more energy than the first, the electron must gain energy to travel from n = 1 to n = 2. A neutral atom of nitrogen has electrons in energy levels are 1 and 2.

What is energy level ?

Any discrete value from a set of total energy values for a subatomic particle constrained by a force to a finite space or for a system of such particles, such as an atom or a nucleus, is referred to as the energy level, also known as the energy state, in physics.

"Energy levels" refer to the areas around the nucleus where an atom's electrons are positioned. The 3-dimensional region around the nucleus where electrons are most likely to be is represented by an energy level.

Every component of the cycle of wellness depends on energy. Our attitude and physical health both get better as we get more energy. Connecting with people, exercising, and feeling driven to work hard and accomplish personal objectives are all more likely.

Thus, option C is correct.

To learn more about energy level, follow the link;

https://brainly.com/question/17396431

#SPJ2

Match each term to its correct description

1) Limiting reactant
2) Theoretical yield
3) Excess reactant


a) Reactant that has some leftover at the end of the reaction
b) Reactant that is entirely used up in the reaction
c) Mass of product that can be made by the given masses of reactants

Answers

Answer:

C

A

B

Explanation:

Excess reactant: Reactant that has some left over at the end of the reaction

Limiting reactant: Reactant that is entirely used up in the reaction

Theoretical yield: Mass of product that can be made by the given masses of reactants

The terms have been correctly matched to their descriptions as follows:

Limiting reactant: b) Reactant that is entirely used up in the reaction.Theoretical yield: c) Mass of product that can be made by the given masses of reactants.Excess reactant: a) Reactant that has some leftover at the end of the reaction.

What is a Reactant?

A reactant is a chemical compound or element that participates in a chemical reaction.

The limiting reactant is completely used up after the reaction while the excess reactant is the compound or element that is much more than what is normally required to complete the reaction.

The theoretical yield is the maximum quantity of the product that can be formed by the reactants.

Learn more about reactants here:

https://brainly.com/question/6421464

Help
I don't understand
I think that is A and D ?​

Answers

D for sure is the answer


What is the proper nuclear symbol for the the isotope that has 47 protons, 61 neutrons, and 46 electrons?

Answers

It would be Palladium

A fluorescent light tube has an internal volume of 400 cm and an internal pressure of 200 kPa.

It is filled with 0.03 moles of an ideal gas.

What is the temperature of the gas inside the fluorescent light tube?

A 3.21 x 10 K

B 3.21 x 10?K

с 3.21 x 105K

D 3.21 x 10K
with explanation plz​

Answers

Answer:

Temperature of gas is 3.21×10² K

Explanation:

Given data:

Volume of bulb = 400 cm³        (400/1000 = 0.4L)

Pressure of bulb = 200 KPa      (200/101= 1.974 atm)

Number of moles of gas = 0.03 mol

Temperature of gas = ?

Solution:

Formula:

PV = nRT

R = general gas constant = 0.0821 atm.L/ mol.K

1.974 atm × 0.4 L= 0.03 mol ×  0.0821 atm.L/ mol.K × T

0.7896 atm.L = 0.002463 atm.L/K × T

T = 0.7896 atm.L / 0.002463 atm.L/K

T = 321 K   0r 3.21×10² K

The state department of health manages issues
related to which of the following? Check all that
apply.

Answers

Answer:

water quality, nursing home safety, and emergency preparedness

Explanation:

i just answered it

Calculate the oxidation number of sulphur in H2SO4

Answers

Answer:

42

Explanation:

my brother said

How many atoms are present in 3 moles of chromium?

O 52.0 atoms
O 6.02 x 1023 atoms
O 1.80 x 1023 atoms
O 1.80 x 1024 atoms

Answers

Answer:

1.80 x 10^24 atoms

Explanation:

3moles × 6.022×10^23 atoms/mole

I NEED HELP FAST

complex conversions between units may require using __________ conversion factor

Answers

Answer:

More than one

Explanation:

Answer:

More than one

Explanation:

Quizlet says so

A rock is an (blank) of minerals.


I don't get this at all.

Answers

Please mark as Brainiest. I would be so happy!!!

Answer:

Minerals - composed of orderly arrangements of atoms. Rocks - are composed of minerals. Crystals - solid materials that have an orderly arrangement of atoms. Gems - are rare and beautiful minerals that often are cut from crystals.

The ____________________ metals are all of the elements located in groups 3-12 on the Periodic Table.

Answers

Answer:

Transition Metals are all of the elements kn group 3-12.

Compound I --> 75g total, 52.46g iron, 22.54g oxygen, Compound 2 --> 56g total, 43.53g iron, 12.47g oxygen


PLEASE HELP

Answers

Answer:

1*6

Explanation:


1. A substance has a mass of 5.55 g and a volume of 3.00 cm”. Determine the density of this
substance and then use Table Sto identify the substance.
I need help please

Answers

Answer:

1.85 g per cm^3

The substance is Beryllium(if it is a single element, and not a compound)

Explanation:

4. DNA replication:
a. Occurs in the cytoplasm of the cell
b. Does not require proteins
C. Takes place in the nucleus of the cell
Is constantly happening in a cell

Answers

Answer:

A.

Explanation:

Answer:

b

Explanation:

right
a force of 20 newtons (N).
Mass 10 kg
Force
20 N
22. Using the equation below, calculate the acceleration of
the cart in meters per second squared (m/s 2)
Force = Mass X Acceleration
m/s 2

Answers

They have you the equation and everything to plug in. You barely have to do anything here, I’m unsure why you’re even asking.
Force = mass*acceleration
20N = 10kg*a
a = 2 m/s^2
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