atmosphere is a mixture of two things

Answers

Answer 1

Answer: yes

Explanation:

It's a mixture of different gases. The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen.


Related Questions

hat type of cells do not undergo mitosis?

Answers

Answer:

Neurons, cardiac muscle, Red/white blood cells, skeletal muscle, smooth muscle, sperm cells, egg cells

Explanation:

In red shift the wavelengths of light become ?

Answers

What subject is hypos? *this

You are running a marathon and observe that running increases your pulse rate. Using what you know about the scientific method complete the following:

1. Hypothesis: __________________________________________________________________

_____________________________________________________________________________

2. Independent variable: _________________________________________________________

3. Dependent variable: ___________________________________________________________

4. Controlled variables (at least 3): _________________________________________________

_______________________________________________________________________________

5. Control Treatment: ___________________________________________________________

6. Experimental Treatment: _______________________________________________

Answers

Answer:

hypothesis is A hypothesis (plural hypotheses) is a precise, testable statement of what the researcher(s) predict will be the outcome of the study.

Explanation:

independent variable is what u can change

dependent variable is the one u can measure

control variable is one u keep the same

control treatment In the design of experiments, treatments are applied to experimental units in a treatment group. In comparative experiments, members of a control group receive a standard treatment, a placebo, or no treatment at all. There may be more than one treatment group, more than one control group, or both

experimental treatment in research, the conditions applied to one or more groups that are expected to cause change in some outcome or dependent variable.

What are the 5 main steps in the formation of the Solar System?

Answers

Answer:

These steps should cover it all

Can i have brainley please

Explanation:

Step 1 of the formation of the solar system

the solar nebula collapses

Step 2 of the formation of the solar system

rotating protostellar disk

Step 3 of the formation of the solar system

center of nebula fusion begins, star is born

Step 4 of the formation of the solar system

Planeteseimals eventually planets form

The formation of clumps, its collapse, heating and rapid cooling, formation of planetesimals, and Oligarchic growth  are the five main steps of solar system formation.

What is a solar system?

The Solar System is composed of the Sun and the planets gravitational bound to the Sun.

The Solar System went through five stages of creation and initial evolution:

The establishment of dense clumps within a massive molecular cloud.The clumps crumble by gravitational force to establish a protostar; angular momentum conservation outcomes in a protoplanetary disc.The sudden heating and cooling of dust results in the formation of Ca-Al-rich refractory aggregates (CAIs) and spatters of silicate melt.Planetesimals form from dust, CAIs, and chondrules.Oligarchic development into planet embryos and planets.

Thus, above mentioned are the five steps in formation of solar system.

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How is it possible that all animal life depends on the chloroplast for energy

Answers

chloroplast contains chlorphyll . Chlorophyll is used in photosynthesis to produce glucose . (photosynthesis is a process where green plants manufacture simple sugar (glucose) from carbondioxide and water by using sunlight ) 6co2+6h2o=c6h12o6+6o2

if theres no chloroplast no glucose will be produced so animals will have no energy. chloroplast must be present in order of photosynthesis to take place and produce glucose , when plants produce glucose animals get the energy needed by feeding on plants (in simple words animals eat the sugar that plants have produced )

How is tonicity affected by solutes?

Answers

Unlike osmotic pressure, tonicity is influenced only by solutes that cannot cross the membrane, as only these exert an effective osmotic pressure. Solutes able to freely cross the membrane do not affect tonicity because they will always equilibrate with equal concentrations on both sides of the membrane without net solvent movement.

Where are there typically more ecological hotspots?

Answers

Answer:

There are currently 36 recognized biodiversity hotspots. These are Earth's most biologically rich—yet threatened—terrestrial regions. To qualify as a biodiversity hotspot, an area must meet two strict criteria: Contain at least 1,500 species of vascular plants found nowhere else on Earth (known as "endemic" species). The Andes Mountains Tropical Hotspot is the world's most diverse hotspot. About one-sixth of all plant species in the world live in this region. The New Zealand archipelago is another hotspot.

Explanation:

What defines the carrying capacity of a particular species?please help

Answers

carrying capacity can be defined as a species' average population size in a particular habitat :)

Explanation:

avarage particular size in capacity

PLEASE HELP MEH!!!!

A patient’s blood is tested for growth hormone which has a molecular mass of 848.952 g/mol. The test results show a normal concentration of 4 . 0 × 10 − 6 g/L. How many moles of growth hormone are in 1 L of blood?

Answers

30 g molecular concrete

1) Which of the following types of heterotrophs eat other animals?
A. omnivores
B. herbivores
C. carnivores

Answers

Answer:

A & C (Omnivores and Carnivores) eat other animals.

Answer:

A and c

Explanation:

heterotrophs eat other animals?

. omnivores and carnivores

What relationship does Organism Y have with the other organisms in figure 1?

1. It is the herbivore that feeds on autotrophs.

2. It is the producer that provides the food base.

3. It recycles nutrients by breaking down organic matter.

Answers

I think it’s number 2. The plant can feed the other organisms

Transpiration is the loss of water from the leaves of plants. The stomata of leaves must
open to allow carbon dioxide to enter the leaf for photosynthesis, but when they are open,
water vapor escapes into the atmosphere.
HYPOTHESIS: As the intensity of light is increased, the rate of transpiration will increase,
as measured in by the loss of mass of the plant.
what is the independent and dependent variable HELP

Answers

Answer:

Explanation:

dependant= loss of mass of the plant (not sure) as you're measuring it i guess? or it may be transpiration. which one are you actually measuring

independent=light of intensity as you're changing

Students in a science class were asked to investigate how missing or damaged
organelles affect cellular homeostasis for cells found in muscle tissues.
Which of the following questions should they ask to determine if these muscle cells
are functioning properly? (AKS 151)
At what rate do the chloroplasts of the cell need to capture enough sunlight to
meet the high energy needs of the cell?
At what rate do the ribosomes of the cell need to work to produce enough
glucose to meet the high energy needs of the cell?
At what rate do the mitochondria of the cell need to convert glucose to usable
energy molecules to meet the high energy needs of the cell?
At what rate does the cell wall need to break down its carbohydrate structure to
meet the high energy needs of the cell?

Answers

Answer:

At what rate do the mitochondria of the cell need to convert glucose to usable

energy molecules to meet the high energy needs of the cell?

Explanation:

Organelles are organ-like structures found in cells. The are responsible for the specific actions carried out by each cell. Each organelle has its own specific role to play. However, missing or damaged organelles can have effects on the cells.

Mitochondria are organelles found in cells of all eukaryotic living organisms e.g animal, plants as they are responsible for the synthesis of energy in form of ATP. Since the cells being investigated in this question is a MUSCLE CELL, which is only found in animals, then an appropriate organelle must be investigated.

The appropriate to be asked to know if muscles cells are functioning properly is: At what rate do the mitochondria of the cell need to convert glucose to usable energy molecules to meet the high energy needs of the cell?.

Note that, other options are incorrect because muscle cells do not have chloroplast and cell wall, while ribosomes are not site for glucose production.

Which clue can be used to identify a chemical reaction as a combustion reaction? Oxygen is a product. A hydrocarbon reacts with oxygen. Water and carbon dioxide react. The reaction involves ions.

Answers

Answer:

A hydrocarbon reacts with oxygen

Explanation:

The clue that can be used to identify a chemical reaction as a combustion reaction from the options would be if a hydrocarbon reacts with oxygen.

Basically, a combustion reaction is a kind of reaction involving oxygen and another reactant with energy being released in the process. The energy is usually in the form of light and heat.

Thus, following the definition:

Oxygen is rather a reactant, and may not be a product in combustion reactionsWater reacting with carbon dioxide is not a combustion reactionReaction involving ions may not be a combustion reaction

The only reaction that may identify as a combustion reaction is, therefore, the one involving hydrocarbon and oxygen.

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In Oxygen molecule O2, stability is gained through sharing of​

Answers

Answer:

Trees and plants.

Explanation:

Trees give us oxygen and plants get rid of carbon dioxide and remake it as oxygen.

In the Oxygen molecule O2, stability is gained through sharing of​ two pairs of electrons with a single neighboring atom.

What is the sharing of electrons?

The sharing of electrons gives rise to the formation of covalent bonds between two atoms. Atoms will be covalently bonded in order to gain more stability. During the process of sharing electrons,  they are simultaneously attracted by the two atomic nuclei.

The stability of oxygen molecules is gained through the help of non-polar covalent bonds. This means that there is no difference in electronegativity of bonded atoms.

The valence shell of oxygen has six electrons, so they need two more electrons in order to fulfill its octet and maintain stability. The sharing and paring of electrons between two or more atoms construct a bond known as covalent bonds.

Therefore, in the Oxygen molecule O2, stability is gained through sharing of​ two pairs of electrons with a single neighboring atom.

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*
4. What are the only prokaryotes?

Answers

Answer:

Bacteria is the only prokaryotes.

Some cynobacteria are also included in prokaryotes.

Bacteria is mainly the only one

One summer, the anthropologist returns to the site at the start of a new field season. He discovers that the same local residents who he hires in the summer have allowed their cattle to graze on the site over the winter while he was gone. The cattle have trampled some of the site and have permanently damaged the irreplaceable fossil materials. How should he proceed?

Answers

Answer:

The remaining part was not damage so the anthropologist can proceed his research.

Explanation:

The anthropologist should continue his work on the remaining part of the field for its study because the remaining part is not disturb by the animals, only little part of the field was damaged during grazing so the anthropologist can take his information from the remaining field and avoid taking data from the affected field due to damaged was done fossil materials and the fossil materials was not present in its original shape..

Shannon wants to see if the amount of time she studies will affect her grades. She normally studies for 30 minutes a night but decides to double her study time to one hour per night. Over the next three weeks, Shannon sees her science grade raise 10%
A. Independent Variable=
B. Dependent Variable=
C. Control=

Answers

Answer:

it is an independent variable as it can be changed by studying and also a dependent variable as you can measure her results and see its increase or decrease

Explanation:

hope this helps

could u pls help me with my latest questions pls pls pls pls pls

The variables in the given situation would be as follows:

A). Independent Variable: Amount of time given on study

B). Dependent Variable: Grade in Science

C). Control: Additional Study of 30 minutes

In an experiment or research, an independent variable is described as a variable that remains unaffected by the change in other but rather a manipulation or change in it can affect the other variables. Dependent variables are the variables that receive a direct effect of change in the other variable and therefore, it is the variable that the researcher aims to measure or study.While control helps in making the comparison of the results with or without it. Thus, the given variables are classified in this situation as mentioned above.

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5 On his voyage on the HMS Beagle, Darwin saw fossils of giant sloths whose bones resembled bones of living sloths, but were much larger in size. Darwin hypothesized that the fossil sloths were related to sloths alive today. This hypothesis was based on (1 Point)​

Answers

Answer:

A: observation and inferences

and on this one I am 100% sure it is right

Explanation:

What type of macromolecule is oil?

Answers

it’s lipids because they provide energy for living organisms, insulate body organs, and transport fat-soluble vitamins through the blood

hope this helped!!!

Based on the information in the graph, choose the statement that best describes the reaction it depicts. A. The reaction absorbs energy. B. The reaction releases energy. C. The reaction fails to proceed because of insufficient energy. D. The reaction fails to proceed because it does not involve an energy change.

Answers

Answer:

The answer is B the reaction releases energy.

Explanation:

As per the graph, the reaction will release energy. The correct option is B.

What is exothermic reaction?

A heat-producing task is an exothermic process. This heat is conveyed to the external environment. Endothermic processes require heat to be supplied to the system from outside the system.

Exothermic reactions are heat-producing chemical reactions. When heat flows from the system to the surroundings, the heat flow q is negative. Exothermic reactions, therefore, have a negative enthalpy of reaction.

Thus, the correct option is B.

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I need some help! What cell structure goes to what definition? The structures as well as the descriptions are below.

lysosome


vesicle


nucleus


Golgi apparatus


chloroplast


smooth endoplasmic reticulum


nucleolus


rough endoplasmic reticulum


ribosome


mitochondrion

1.
contains chlorophyll, site of photosynthesis

2.
contains chromosomes, directs cell’s activities

3.
contains hydrolytic enzymes

4.
membranous network that detoxifies and helps synthesize lipids

5.
membranous network that helps synthesize proteins

6.
modifies and stores the products of the ER

7.
site of cellular respiration and ATP production

8.
site of protein synthesis

9.
site of ribosomal RNA synthesis

10.
small membrane-bound sac within a cell

Answers

Answer:

1-chloroplast

2-Golgi apparatus.

Explanation:

Choose the answer that describes biological weathering.

A: lichen growing on rocks

B: salt crystallization forming tafoni

C: stone and boulders moved by water

D: acid in water acting on limestone

Answers

Answer:

A.  lichen growing on rocks

Explanation:

Lichen growing on rocks and types of bacteria produce chemicals that weather minerals 3 to 4 times faster than normal.

Plants' roots, mosses, and lichen which grow on rocks highly responsible for biological weathering, hence option a is correct.

What is biological weathering?

Rocks are biologically weathered by living things like lichens, mosses, and plant roots, among others.

When plants break apart rocks with their roots or root exudates, this is known as biological weathering. The delayed process might have a significant impact on how a landscape is formed.

Mosses and lichens are able to break down the rock on which they grow by producing various acids.

Therefore, lichens and non-vascular plants can speed up the weathering of the rock they grow on significantly, hence option a is correct.

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What two factors keep Earth in orbit around the sun and the moon in orbit around Earth? A:gravity and distance B:Mass and distance C:force and speed D:gravity and force

Answers

Mass and Distance. If the moon had a larger mass or was farther then it would fall out of Earths orbit. Same for Earth. The mass and distance affect where the planet falls into orbit

Answer:

gravity and inertia Gravity keeps Earth, along with the other planets in line, as inertia keeps them moving creating an orbit.  

its C hope it help

Which eukaryotic kingdoms could be made up of multicellular organisms

Answers

Answer:

the inside

Explanation:

Enzymes are biological catalysts. Enzymes are proteins that are found inside cells to
increase the rate of chemical reactions within each cell. Enzymes are denatured
(destroyed) by various environmental conditions. Amylase is an enzyme in the digestive
system that helps to break down complex carbohydrates into simple sugars.
HYPOTHESIS: Amylase works best in an environment with a pH level of 7. what is the independent and dependent variable sum1 please help!

Answers

Answer:

Explanation:

independent= pH as you will change the pH in order to test your hypothesis and see if it's true

dependent= how amylase works-needs to be measured so you can see how easily it does it function depending on the pH (dependent on the independent variable)

The independent variable is pH, you change it to test your hypothesis; The dependent variable is the activity of amylase enzyme depend on the pH value.

What are the properties of an enzyme ?

Enzymes are protein catalysts that speed up the rate of biochemical reactions

The  enzyme activity is pH-specific, catalyze both forward and reverse reaction but do not decide the direction of the biochemical pathway.

An enzyme have active site which bind to substrate  and form desired products.

Several factors influence the enzyme activity like heat, temperature and varying pH.

Enzyme show absolute, relative, group, stereo-specificities and regulatory function.

Physical properties include enzyme act as colloid, it become inactivated below boiling point of water.

Enzymes are  thermos-labile as it can withstand temperatures of 100 degrees.

The optimum temperature needed for enzymatic activity varies from 25 degrees Celsius to 45 degrees Celsius.

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All of the following movements can occur across the intervertebral joints of the vertebral column except:______
a) extension.
b) lateral flexion.
c) flexion.
d) dorsiflexion.

Answers

Answer:

D) dorsiflexion

Explanation:

extension, lateral flexion, flexion can occur across intervertebral joints of the vertebral column. Dorsiflexion is the odd one out.

Dorsiflexion is the act of bringing the toes closer to the shin, it is also referred to as the backward bending of an individual's foot or hand. when someone is walking on the heels of their ankle, their ankle can be described to be in dorsiflexion. therefore option d answers the question.

Explain how the bacteria and animals around the hydrothermal vents showed scientists that life was much more adaptable than they had believed.

Answers

Explanation:  

Well, its extremely hot in the hydrothermal vents. Scientists simply believed it would be impossible for anything to survive due to the heat. Bacteria and micro-organisms were able to adapt to growing there, though. So in short words, they survived extreme conditions teaching scientists that life was quite adaptable.

Weird fun fact: In Switzerland it is illegal to own just one guinea pig. Felt the need to mention that ^ Sorry, I know it has nothing to do with the question but i felt it was worth speaking of.

A 7.2 × 10–5 C charge has an electric potential energy of 1.08 × 10–2 J. The electric potential, to the nearest whole number, is V.

Answers

Answer:

150.

Explanation:

On edge

The electric potential, to the nearest whole number is 150 V.

What is the electric potential energy?

The electric potential energy denoted by U is proportional to the charge and inversely proportional to the distance between the point where its is brought from infinity to the charge.

U = kQ₁Q₂/r

For identical charge,

U =kQ²/r................(1)

and the electric potential is given by

V = kQ /r................(2)

Dividing both the equations, we get

U/V  = Q

Substitute charge Q =  7.2 × 10⁻⁵ C, Electric potential energy U = 1.08 × 10⁻² J, then the electric potential will be

V  = 1.08 × 10⁻² /   7.2 × 10⁻⁵

V = 150 Volts

Thus, the electric potential is 150 Volts.

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What is in the center of every atom?

Answers

Answer:

The Nucleus, comprised of Protons and Neutrons.

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In a free market, the price of goods is set byO government officials.O the consumer.O the producer.O workers and owners. if you're in k12 you might know this one.why did fewer cities develope in the sothern colonies? solve for the equation 3x+2=8 solve 2x^3+7x^2-2x-1=o Read the quotation from Henry David Thoreau's Walden.Every day or two I strolled to the village to hear some of the gossip which is incessantly going on there,circulating either from mouth to mouth, or from newspaper to newspaper, and which, taken in homeopathicdoses, was really as refreshing in its way as the rustle of leaves and the peeping of frogs. As I walked in thewoods to see the birds and squirrels, so I walked in the village to see the men and boys; instead of the windamong the pines I heard the carts rattle.Which is the best example of a vivid sensory detail?O "I strolled to the village"O "to hear some of the gossip which is incessantly going on there"O 'as the rustle of leaves and the peeping of frogsO "As I walked in the woods" The Southern colonies rich soil and warm climate made them good for growing crops. As a result, the Southern economy was almost completely based on farming. An economy is a system for producing, buying and selling goods and services. In the Southern colonies, farmers could produce many more crops than they needed for their families. They could sell these crops to make a lot of money. These cash crops were grown on large farms called plantations. They included cotton, tobacco, rice, sugar cane and indigo.Based on the passage, what is true about the Southern colonies?AReligion affected their economy.BThe climate affected their economy.CSmall farms there didnt produce any cash crops.DCash crops were not a big part of their economy What is the symbol for the element that has 12 protons,14 neutrons, and 12 electrons Let f(x)=5x+4 and g(x)=x^2-7x+12Perform the function operation f(x)g(x) At 8 a.m. the temperature was 56F. By noon a storm had arrived, and the temperature was 43F. Which describes the change in the temperature from 8 a.m. until noon? Divide 5 3/41 1/2. Answer: 3 5/6 4 1/4 7 1/4 8 5/8 As tonya considers her audience what techniques can she include in her communication strategy to help avoid any barriers to effective listening her audience might have to her message Analyze the diagram below and complete the instructions that follow. If ON = MN, find MN. A. 4 B. 5 C.4 sqrt{2}]. D 4 square root 30 2(2t+4)=3/4(24-8t) What does t equal?? plz help!!! thank you so much which of the following is the best explanation of how one organelle and a cell directly supports the work of another organelle to maintain cellular homeostasis The spray from a sprinkler reaches 21 feet from the sprinkler and creates a circle as it spins. What is the circumference of the circle sprayed by the sprinkler? Use 22/7 for . how did increased wealth influence ancient civilizations? Irving Manz works for Bens Food Mart. He is paid weekly on the basis of a 40-hour week at the rate of $8.95 an hour with time-and-a-half for overtime. During one week he works 49.5 hours. What was Irvings time-and-a-half pay rate an hour? These are all examples of what type of figurative language?Costs an arm and a legKill two birds with one stone. Stabbed in the back "Cross your fingers""Fell on deaf ears" a- Idioms b- similes c- personification d- analogy Colby has $100. He buys five CD's that cost x dollars each, and then he buysthree DVD's for y dollars each. Write an algebraic expression for the amountof money he has remaining (in terms of x and y). 2. 6x3 +7 -1x4 =3. 12 = 4 +2x5 =4. 14 - 6 - 2x10 =5. 3x4 +10 = 2 =