Which of the following situations
demonstrates a chemical change?
A. wood turning to ashes as it burn's
B. ice forming when water is placed in a freezer
C. sugar dissolving in a glass of hot
tea
D. a board becoming smooth as it is sanded

Answers

Answer 1
A. wood turning to ashes as it burns, because when something burns that is a chemical change
Answer 2
The correct answer is A

Related Questions

Explain the 6 levels of organization.

Answers

Life processes of the human body are maintained at several levels of structural organization. These include the chemical, cellular, tissue, organ, organ system, and the organism level.

differences between the structure of the wall of the stomach and the structure of the wall of the ileum​

Answers

Answer:

Wall of stomach : it has three layers of muscle instead of two. Under these muscle layers is the adventitia, layers of connective tissue continuous with the omenta. The epithelium of the stomach forms deep pits, called fundic or oxyntic glands.

wall of ileum : The wall itself is made up of folds, each of which has many tiny finger-like projections known as villi on its surface. The ileum has an extremely large surface area both for the adsorption of enzyme molecules and for the absorption of products of digestion.

This model of the cell cycle includes two arrows that each represent a process in the cycle.


What do the two arrows represent?

Answers

Answer:

the order in which it is preformed.. sorry if in wrong

what are the living bone cells that receive oxygen and other nutrients from small blood vessels running within the skeletal system?​

Answers

Answer:

I think Osteocytes and hematopoietic stem cells

Can anyone explain capillary action in the circulatory system in simple terms?​

Answers

Please make me as brainlist

Capillary action is defined as the spontaneous flow of a liquid into a narrow tube or porous material.

Describe solar energy:

Answers

Answer: the light and heat that come from the sun

Explanation:

That’s it lol

How is computer science helping this scientist do her research?​

Answers

Answer:

Computer and information research scientists invent and design new technology and find new uses for existing technology. They study and solve complex problems in computing for business, science, medicine, and other uses.

Explanation:

Answer:

While following a similar education and career path to that of information systems managers and computer programmers, computer and information research scientists have a specific subset of skills and duties that sets them apart from other computing professionals.

Information research scientists work to advance the field of computing and create new computing-based solutions to problems in countless industries. Their role is as a trailblazer: The development and design of new digital technologies, such as data mining software, is the quintessential duty of a computer research scientist.

Repurposing older technology to work in specific contexts is another frequent activity of a research scientist. They put the “science” into computer science — they research, test, and create, whereas other CS disciplines might focus on information systems management or programming software. Notable historical figures in computing, such as Ada Lovelace and Alan Turing, would be classified as computer and information research scientists today. The advancement of the field is the mission for those in this career.

Due to the broad applicability of computing technology to various fields, computer and information research scientists can be found in almost every industry. From food service to aerospace engineering, nearly every line of work can use these research scientists. As a result, duties for this career can vary greatly.

Many computer research scientists can be found in the field of robotics, where software combines with mechanical hardware to create machines that are more efficient and viable in commercial use. Others might find themselves in the medical field, creating new systems for collating and analyzing patient data. The ubiquity of computing technology means that a typical day for a computer and research scientist is almost impossible to define, and this makes the field quite exciting and dynamic.

There are some common trends that can be defined, however. Computer and information research scientists should expect to become familiar with machine learning and artificial intelligence. This emerging field of computing is perceived as the iconic technology of the future. The demand for computer scientists experienced in machine learning and AI is growing fast. As research scientists, those in this career will be hard-pressed to avoid work that involves AI. Many roles in academic and private settings focused on the research and advancement of artificial intelligence can be found. This field is slowly dominating the focus of many different industries: Automotive, health care, marketing, and even private military companies all have their hands in the world of AI, and that list is growing bigger each day.

The basic idea of the occupation is that information scientists invent new computing technologies in response to various needs. Invention naturally leads to technological advancements in many different lines of work.

Which is the highest population density of grasshoppers?
O
A. 35 grasshoppers/10 square meters
o
O
B. 40 grasshoppers/20 square meters
O C. 1 grasshopper/1 square meter
O D. 50 grasshoppers/30 square meters

Answers

35 grasshoppers/10 square meters has the highest population density.

The highest population density of grasshoppers is 35 grasshoppers/10 square meters because more number of organisms are present in less area as compared to other population density. In the option i.e. 40 grasshoppers/20 square meters and 50 grasshoppers/30 square meters have more number of organisms but the area is also greater.And we know that high population density means more number of organisms in less area so we can conclude that 35 grasshoppers/10 square meters has the highest population density.

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What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell?
A. Diffusion
B. Passive transport
C. Exocytosis
D. Endocytosis

Answers

Answer:

Endocytosis.

Explanation:

In endocytosis, the cell membrane forms a cup-like sac around the molecule, the two lips of the cup meet around the molecule so that a vesicle is formed by the separation of that part of the cell membrane.

D. Endocytosis
Exocytosis would be allowing a molecule out of the cell

in which layer of the sun does light form ?

Answers

Answer:

The photosphere

Explanation:

The photosphere

The photosphere is the visible surface of the Sun (Figure 24.18). This is the region of the Sun that emits sunlight. It's aso ne of the coolest layers of the Sun—only about 6700°C.

18.
Which of the following organisms are
producers?
A. humans
B. bears
C. trees
D. fungi
19.

Answers

Trees are producers

I hope this helps

Answer:

Trees

Explanation:

Trees are the only thing on the list that does nothing but help the environment/produce. Its not fungi because fungi is literal harmful bacteria that molded.

whales and dolphins navigating underwater with sound waves is called what?

Answers

Echo location is what dolphins use navigate
They use echolocation

what is the relationship between the photosystems and the calvin cycle

Answers

What is the relationship between the photosystems and the Calvin cycle? The photosystems transfer energy to the Calvin cycle through ATP and NADPH.

I hop this helps! :)

Write down the complementary DNA strand that correctly matches with the one
Original DNA
Complementary DNA
GTA ATT CCG AGC GGT
ATG CCC AGA TCG TAG
GGA TAT CAG AAC TTG

Answers

1. CAT TAA GGC TCG CCA
2. TAC GGG TCT AGC ATC
3. CCT ATA GTC TTG AAC

animals of the same general body types have the same anatomy true or false​

Answers

Animals of the same general body types having the same anatomy is True.

Anatomy is the study of the body parts, structures and functions of

organisms.

In situations where animals have the same general body type , then it means

they also have the same anatomy. A good example is mammals which have

the same structure of  body parts and the same anatomy.

Organisms with different body structures however have an entirely different

anatomy which is why True is the most appropriate choice.

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This food web illustrates some characteristics that ANIMALS have in common. Find all the animals. What do they all
have in common?
A)
They are all predators.
B)
They must consume their food.
C)
They all have a skeletal system
D)
They all recycle matter in the food web.

Answers

Answer:

B) They must consume their food.

Explanation:

I just did the test

How do we know that the ocean is continually absorbing carbon from the atmosphere, helping with climate stability?
O Increased carbon in the oceans have made them more acidic.
O Ocean pH has increased significantly in the last decade.
O There are bubbles like carbonation on the ocean surface.
O Fish we catch and eat from the ocean are made of carbon.

Answers

The concentration of carbon is increased in the oceans have made them more acidic.

Increased carbon concentration in the oceans which have made the ocean water more acidic is the indication that more carbon is absorbed by the ocean. When carbon absorbed by the ocean, the carbon reacts with water which produced carbonic acid.

This carbonic acid decrease the pH of the ocean water that adversely affect the marine organisms especially coral reefs. When the pH of the ocean water increases, bleaching of coral reef occurs because the algae living on them die so we can conclude that the concentration of carbon is increased in the oceans have made them more acidic.

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Answer:

A

Explanation:

Increased carbon in the oceans has made them more acidic.

Which location will cost the most for mining and reclamation at the end of the mining period?

Location 1

Location 2

Location 3

Location 4

Answers

The cost of mining and reclamation for location 4 will cost the most at the end of the mining period.

Location 4 will cost the most for mining and reclamation at the end of the mining period because the cost of mining and reclamation of the location 4 is $7,000 per 65 daysWhile on the other hand, the cost of mining and reclamation of location 1 is $5,000 per 30 days, location 2 is $4,500 per 45 days and location 3 is $3,500 per 120 days.So from this information we can conclude that the cost of mining and reclamation for location 4 will cost the most at the end of the mining period.

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Options are given below:

1. $100,000$10,000$5,000 per day30 days

2. $35,000$6,000$4,500 per day45 days

3. $30,000$7,500$3,500 per day120 days

4. $40,500$8,000$7,000 per day65 days

Find the final amount of money in an account if $9, 100 is deposited at 6.5 % interest compounded

quarterly (every 3 months) and the money is left for 7 years.

Answers

Answer:

you will have a negitative amount

Explanation:

so there is 12 mounths in a year divided by 3 is 4 then times by 7 is 28.

so then 9,100 times .065 is 591.5 that is how much mony goes in the 3 months. Then you do 28 x 591.5 =16562 so you wont have any money left you will actually be in the negitatives.

Hoped that leped:P

briefly describe the nebula theory formation of our solar system use the words protostar and protoplanets in your discussion

Answers

Answer:

Below!

Explanation:

Currently the best theory is the Nebular Theory. This states that the solar system developed out of an interstellar cloud of dust and gas, called a nebula. This theory best accounts for the objects we currently find in the Solar System and the distribution of these objects. The Nebular Theory would have started with a cloud of gas and dust, most likely left over from a previous supernova. The nebula started to collapse and condense; this collapsing process continued for some time. The Sun-to-be collected most of the mass in the nebula’s center, forming a Protostar.

A protostar is an object in which no nuclear fusion has occurred, unlike a star that is undergoing nuclear fusion. A protostar becomes a star when nuclear fusion begins. Most likely the next step was that the nebula flattened into a disk called the Protoplanetary Disk; planets eventually formed from and in this disk.

Three processes occurred with the nebular collapse:

Temperatures continued to increase The solar nebula spun faster and faster The solar nebula disk flattened

The orderly motions of the solar system today are a direct result of the solar system’s beginnings in a spinning, flattened cloud of gas and dust.

Hoped this helped.

[tex]-BrainiacUser1357-[/tex]

As a metal, lithium will lose electrons to have a ful valence shell. How manyvalence electrons will it lose to have full valence shell? What will be the charge of the lithium ion?

please help me​

Answers

Answer:

It will lose 1 electron

Its charge will be 1+, or simply (+)

Explanation:

Lithium it's located in the group one of the periodic table, the Alkali, and by rule, all Alkali are always gonna loose one electron during a chemical reaction to form a positive ion.

The charge is explained by the fact that, if lithium looses one electron, then it wi have less number of electrons than protons, meaning that, if there's a higher number of protons (positive charge), then the charge will be positive. And since the atom loosed one electron then its charge will be 1+

For example, during a chemical reaction calcium is always gonna loose 2 electrons, so its charge's gonna be Ca2+

Answer the following for 20 points ……….

Answers

The grain size for location D (hornfels) is fine.

PLZ HELPPPPPP

Which of the following is a possible consequence of solid pollutants in a lake or river?
O Build-up of garbage in freshwater
O Quick drop in dissolved oxygen
O Decrease in algae colonies
O Sudden hypoxic waters



HELP PLZ

Answers

Answer:

I believe it would be B.) Quick drop in dissolved oxygen

Quick drop in dissolved oxygen is a possible consequence of solid pollutants in a lake or river.

What is Biological Oxygen Demand?

Biochemical oxygen demand (BOD) is the amount of oxygen consumed by bacteria and other microorganisms while they decompose organic matter under aerobic conditions.

Solid pollutants in freshwater bodies like river and lake generally corresponds to organic wastes such as leaves, flowers and clothes which lead to increase in number of microorganisms in these water  that further results in increase of BOD.

Drastic increase in microorganisms lead to drop in amount of dissolved oxygen in water, thus the possible consequence of solid pollutants in a lake or river is quick drop in dissolved oxygen.

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what veins return deoxygenated blood from the head and neck to the heart

Answers

The Venae Cavae

These veins return deoxygenated blood from the body into the heart, emptying it into the right atrium.

what is the female body parts name​

Answers

Answer:

Uterus

Explanation:

A female reproductive organs are the vagina, uterus, fallopian tubes and ovaries

The limb of an alligator, when compared to that of a dog supports which type
of evidence of evolution?

A.embryology

B.fossil record

C.homologous stucture,

D.geographic distribution.

No links or bots please and thank you

Answers

B I think hope this helps :)))

30 POINTS!!! If a forest burns down, which stage of the water cycle is interrupted in that ecosystem, and why?
a. Transpiration
b. Precipitation
c. Infiltration
d. Evaporation

Answers

Answer:

A.TRANSPIRATION

Explanation:

Trees have deeper roots than other plants, which implies they can access and pump up larger soil water volumes for transport to the leaves for transpiration and growth. ... The energy needed to evaporate all that water is withdrawn from the environment and leaves the system as embedded latent heat.

Which means if the forest got messed up the transpiration would be jacked up

These are
inorganic materials needed in small amounts
O Proteins
0 Vitamins
Water
0 0
Fats

Answers

well water would be the only possible answer

what is the process that breaks down nucleic acids into nucleotides
a. dehydration synthesis
b. synthesis
c. polymerization
d. hydrolysis
please help ty

Answers

Answer:

D. Hydrolysis

Explanation:

Dehydration synthesis reactions build molecules up and generally require energy, while hydrolysis reactions break molecules down and generally release energy. Carbohydrates, proteins, and nucleic acids are built up and broken down via these types of reactions, although the monomers involved are different in each case.

I hope this helps have a great day :)

The process that breaks down nucleic acids into nucleotides is hydrolysis. The correct option is d.

What is hydrolysis?

Any chemical reaction in which a water molecule breaks one or more chemical bonds is known as hydrolysis.

When water is the nucleophile, the phrase is used generically to refer to substitution, elimination, and solvation processes.

Nucleo depolymerase is another name for nuclease. By cleaving the phosphodiester bond that connects the nucleotides in the nucleic acids, the nucleic acid is broken down into nucleotides.

Either an enzyme or a non-enzyme can cleave the nucleic acid chain. Since the initial step in the alkaline hydrolysis of a polynucleotide is the transfer of the bond from C5' of the subsequent nucleotide to C2' of the same nucleotide, a 2'-OH group is necessary.

Thus, the correct option is d.

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PLEASE!!!! Which option identifies the satellite technology best utilized in the following scenario?

A forest management company that is not concerned about time-sensitive problems uses a standardized
internet satellite mapping system to get a rough sense of the status of wooded areas that are normally
inaccessible to all but skilled hikers.

Answers

Answer:

standardized

internet satellite mapping system

Explanation:

it says it right in the senario its standard mapping satalite technology

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