Pls help this is due in 5 mins!!!! Brainlest to the best answer and 20 points

Every Cell in the body requires oxygen for respiration so that sufficient energy can be produced. Carbon dioxide, a waste product, is also produced and needs to be removed.
Therefore, the levels of both gases must be regulated. How does this explain the changes in our pulse rates

Answer:

Your pulse will go higher or lower, This explains the changes in our pulse rate because, our heart is having to work twice as hard. Our heart is having to work twice as hard because while its producing oxygen its also getting rid of the Carbon Dioxide. while you are jogging or doing any physical activity than your body requires alot of energy and produce a lot of carbon dioxide which causes the heart to beat fast as to remove co2 and take o2 from the blood leading to higher rate of pulse. on the secon hand if you are sedentary , consumption and production of o2 and co2 respectively will decrease leading to the slow beating of heart leading to low pulse

Explanation:

It's the drawing axis, this is due in some hours so pls hurry.

Why is rain likely when warm, moisture-laden air meets cold air? A) The lighter warm air will rise and cool down, causing condensation and rain. B) The cold air moves faster and pushes the warm air away, causing condensation and rain. Eliminate C) The moisture in the warm air condenses on contact with the cold air, causing rain to fall. D) The cold air mixes with the warm air, reducing its temperature causing moisture to condense.

most of the substances around us are ________

compounds
free atoms
pure elements

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The movement of rocks and soil is an example of

erosion

weathering

deposition

2.

How does alternate freezing and thawing of water cause weathering to occur?

Freezing chemically alters the rock surfaces

Water expands when it freezes and cracks rocks open

Thawing causes rock particles to move from place to place

3.

How can you determine if a mountain valley has been created by a glacier?

It is V-shaped

It is U-shaped

It is irregularly shaped

What is radiation?????????????

Which of the following statements best defines the Law of Conservation of Mass?
Mass cannot be created but it can be destroyed under extreme presures
Mass cannot be conserved during a chemcial reaction: a little bit of mass is always lost
The mass cannot be created nor destroyed
Mass can be created and destroyed

I have 7 more questions left :’)

1. Explain what the process of respiration is.
2. List at least 6 of the organs or structures which exist in the
respiratory system.
3. When we exercise, why do we breathe harder?

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...........

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Asapp

Which of the following represents two molecules of carbon dioxide?

C 2O 2
CO 2
2C 2O 2
2CO 2

Which answer one
(A Carbon dioxide Carbon dioxide enters their leaves from the atmosphere.)
( B Carbon dioxide enters their leaves from the atmosphere.)
(C Carbon dioxide enters their roots from the soil.)
(D Carbon dioxide is produced in a chemical reaction inside their mitochondria.)

Jessica is traveling from Miami, Florida, to Chicago, Illinois. Using the map, tell what the land will be like during the first half of her trip.



The elevation will be high.
The elevation will be low.
The land will be mountainous.
The land will stay below sea level.

You know the drill by now-

How does the diaphragm aide in breathing?
A. When the diaphragm contracts, the lungs expand and allow
oxygen to enter
B. When the diaphragm relaxes, the lungs expand and allow
oxygen to enter
C. The diaphragm does not work with the respiratory system

What is the difference between force and velocity?

The chemical symbol for sulfuric acid is H2SO4. How many atoms are contained in each molecule of sulfuric acid?
a.
3
c.
6
b.
5
d.
7

Frank has an eraser It has a mass of 4g and a volume of 2ml What is its density hint Density equals mass and volume

1.Write the chemical formula for the ionic compound formed by each pair of ions.

a.Na+and Br−

b.Mg2+and Br−

c.Mg2+and S2−

d.K+and Cl−

e.Mg2+and Cl−

f.Li+and N3−

2. Noel created two binary ionic compounds using sameCation and two different anions -MgO and MgCl2Now ,Can you create two binary ionic compounds withTwo different cations and same anion

PLEASE HELP FAST !!

How do you enter the density into the calculator?

A. volume (cm3) / mass (g) =
B.mass (cm3) / volume (g) =
C.mass (g) / volume (cm3) =
D.mass (g) X volume (cm3) =

Which statement describes a chemical property of gasoline?

O A. It melts at -57°C.

O B. It is highly flammable.

O C. It is a clear liquid.

O D. It has a density of 0.7 g/cm3.

Select all that apply. Wire is typically made out of metal because metal

Question 10 options:

Is malleable


Is ductile


Is brtittle


Conducts electricity

What two objects transmit light?

How do you think the presence of farms will affect the oxygen concentration in the ponds? im in sixth grade so i can't really comprehend to much of words lik algae or my teacher will ask me how i got educated on the topic

Compound: ________________
. Found in saltpeter in soil; contain nitrogen (N)

Which of the following descriptions matches the motion shown in the graph.



A person leaves home and slows down for a pedestrian.


A person leaves home, picks up speed, and then stops at a red light.


A person is parked at parking lot and then speeds off.


A person walks down the block at a steady speed.


If I already asked this but please help ;v;

Choose all the answers that apply.

Which of the following are physical properties?

flammability
hardness
magnetism
boiling point
density

One atom of carbon _____.

has four electron shells
is part of all inorganic compounds
forms a special shape called a tetrahedron
can bond with up to four other atoms