Which activity is an example of a chemical change?
Dissolving table sugar in water.
Drops of water forming on a cup of iced tea on a hot day.
Melting gold to make jewelry.
An old penny rusting.

Answers

Answer 1

Answer:

An old penny rusting

Explanation:

A penny forming rust is the penny being chemically altered and changing form as opposed to dissolving sugar in water, which is still sugar, just mixed with water. It doesn't change the chemical makeup of the water or sugar.


Related Questions

During cellular respiration, the covalent bonds of a molecule are broken down to form products. Which molecule is broken down?
O water
O carbon dioxide
sugar
O ADP

Answers

Answer:

sugar C ;D

Explanation:

Sugar is the molecule that is broken down during cellular respiration.

Glucose is a relatively large molecule and contains more energy in its bonds than smaller molecules. Therefore, by breaking it, energy is released that the body can use to perform its vital functions.

This breakdown occurs in cellular respiration, which is a catabolic process in which a fuel molecule, glucose (sugar), whose energy is trapped in the form of ATP (universal source of energy), is oxidized.

Glucose is oxidized and degraded to carbon dioxide and water, producing ATP.

The production of energy in the form of ATP generates heat, so ATP cannot be released all at once, but must occur gradually, in several stages: glycolysis, Krebs cycle and oxidative phosphorylation.

Therefore, we can conclude that sugar, which is the molecule that initiates respiration, is the molecule that is broken down during cellular respiration, which releases the energy stored in the chemical bonds of glucose.

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Explain why a protist living in salt water doesn’t need a contractile vacuole.

Answers

Answer:

Correct

Explanation:

"Living things are found in their habitats. They interact with each other and their environment. This interaction is between biotic and abiotic factors."

Answers

Answer:

TRUE

Explanation:

All living beings that is found in the nature interacts with each other and with the nature and their surroundings. They are always found in their habitats. Different organism living in the biospheres interacts and adapts with each other and to their environment. Such study of interaction of organisms with their environment is called ecology. These interaction is always between the biotic factors and abiotic factors.

The biological influences of the living organisms when they react with the living part of the surrounding or the environment are called biotic factors. While interaction with the non living parts like soil, sunlight, wind,water, etc are called abiotic factors.

Hull fouling is a(n) _______ introduction of nonnative species.
a.
unintentional
b.
intentional
c.
unimportant
d.
land-based

Answers

Answer:

A

Explanation:

Hull fouling is an unintentional introduction of non-native species.

What do you mean by Species?

Species may be defined as a group of organisms that can reproduce naturally with one another and create fertile offspring.

Hull fouling is the outcome of the accumulation of marine growth in the aquatic ecosystem. It indicates the arrival of any non-native species in the different habitats of the ecosystem. It is responsible for enhancing the level of biodiversity in a specific area.

Therefore, Hull fouling is an unintentional introduction of non-native species.

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the dialysis tube was permeable to which substance? how did you determine this?

Answers

Answer:

It was concluded that the dialysis tubing doesn't allow all kinds of substances to pass readily through the pores of its membrane. This means that it is selective in its permeability to substances. The dialysis tubing was permeable to glucose and iodine but not to starch.

Explanation:

The dialysis tubing is selectively permeable because substances together with water, glucose, and iodine were able to pass through the tubing but the starch molecule becomes too big to skip. 3. Sucrose is a disaccharide and therefore much large than the glucose, a monosaccharide, that becomes used within the experiment.

How could you tell the dialysis tubing turned permeable to the iodine?

This could be regarded from the color alternate within the answers within the beaker and the bag. The tubing became permeable to iodine and so the content of the bag became blue-black in color indicating the presence of starch. Glucose is also readily handed through the pores of the membrane.

Which materials crossed the dialysis membrane?

The dialysis membrane is one of the essential components that determine dialysis overall performance. these membranes permit only low-molecular-weight molecules, consisting of sodium, potassium, urea, and creatinine, to skip through even as blocking proteins, along with albumin, and different large molecules.

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There are more smooth muscles in the body than skeletal muscles.

Answers

Answer:

True

Explanation:

There are more smooth muscles as opposed to skeletal muscles

Answer:

true

Explanation:

True or False: Mass changes when gravitational force changes.
Plz help

Answers

Answer:

yes it does

Explanation:

2. What term is also used to describe insertion and
deletion mutations?
A. Gene regulation
B. Frameshift mutations
C. Crossing over
D. Substitutions

Answers

B) frameshift mutations

Easy 10 points Species resource
List all the facts you can pull from the graph?

Answers

Compare reef and lion population sizes , amount of fish , peaked at 6 , lionfish started to increase population size at round 11 and 12, reef fish started to decrease as lion fish grew .

Do you like Science Fiction? Do you think there are some factual components to Science Fiction? Do some research on Science Fiction books and pick one that you find interesting. Keep in mind that our class is EARTH-SPACE SCIENCE and use your initial background in the subject to pick your book. FYI: many Sci-Fi movies also come in a book form so if you want you could see if a movie you like is in book form. We will be using the book-or a portion of the book to write up a Science-Faction. Post the book you want to use here in the discussion.
Class Earth Science
help pleaseeeee

Answers

Yes I like science fiction.

They are not necessarily factual components, but they have their roots with factual components. In fact, many inventions are inspired by science fictions.

I would like to use this book.

Ender’s Game by Orson Scott Card

How are the testes and ovaries similar? A. Both connect internal reproductive organs to the exterior. B. Both transport sex cells from their site of production. C. Both produce sex cells. D. Both store mature sex cells.

Answers

Answer:

C. Both produce sex cells.

explain the reign of terror in brief​

Answers

Answer:

The Reign of Terror or simply The Terror was a period of about 11 months during the French Revolution. During this time, French people who did not support the revolution were executed at the guillotine. The Reign of Terror was started on 5 September, 1793. ... The Terror took the lives of between 18,500 to 40,000 people.

A patient has a history of poor nutrition he has skin rashes bleeding gums and a cut that hasn't healed in a long time what vitamin deficiency most likely caused this

Answers

Answer:

Vitamin C

Explanation:

The following symptoms are found in the disease known as scurvy which is characterized as a vitamin deficiency disease caused by skin rashes bleeding gums, joint pain, and stiffness more. It is caused by Vitamin C also known as ascorbic acid plays various roles in the development and growth and repair of the body cells and tissues. It is a water-soluble vitamin and deficiency of the vitamin result in scurvy or skin disease.

Which of the following best describes why the disks rose to the surface faster in the more concentrated hydrogen peroxide solutions?

Answers

The higher substrate

Hope this helps ^-^ Diamonds is the name Thanks

The best description of the disks rose to the surface faster in the more concentrated hydrogen peroxide solutions, as the higher substrate concentrations in the more concentrated solutions speeded the reaction. The correct option is d.

What is hydrogen peroxide?

Hair bleaching, surface cleaning, and tool disinfection are all done using hydrogen peroxide. It is also utilized in gardening and dental hygiene. Knowing that a highly regarded skin treatment may also be used as a household cleanser may be unsettling.

In the higher-concentration hydrogen peroxide solutions, the discs came to the surface more quickly. The reaction was sped up by the greater substrate concentrations in the more concentrated solutions.

Therefore, the correct option is d. The higher substrate concentrations in the more concentrated solutions speeded the reaction.

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The question is incomplete. Your most probably complete question is given below:

There was more enzyme present in the more concentrated solutions.

A greater amount of heat was generated in the more concentrated solutions.

The more concentrated solutions lowered the activation energy of the reaction.

The higher substrate concentrations in the more concentrated solutions speeded the reaction.

The density of the water was lower in the more concentrated solutions.

Which compound forms when the elements Mg and P combine?
A. Mg2P3
B. Mg2P2
C. Mg3P3
D. Mg3 P2

Answers

Answer:

D. Mg3P2

Explanation:

Magnesium phosphide has the formula of Mg3P2.

Magnesium-phosphide is a white, solid substance. It reacts with water and it is inflammable in the contact with air. It is a toxic substance that helps in making other chemicals.

It is usually used to burn raw substances, such as animal feeds, processed food commodities.

13. This diagram shows which cellular process?
a. Replication
b. Transcription
C. Translation
d. Mutation

Answers

Answer:

B

Explanation:

The cellular process which the diagram above shows is: C. Translation.

Translation can be defined as a cellular process through which a genetic code from a sequence of messenger ribonucleic acid (mRNA) molecule is decoded (translated) to a specific sequence of amino acids, during the synthesis of protein.

Form the given diagram, we can deduce that genetic code from a sequence of messenger ribonucleic acid (mRNA) molecule are being translated into a specific sequence of amino acids such as:

Adenine (A).Guanine (G).Cytosine (C).Uracil (U).

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What is the greatest source of canton that enters the ocean from the atmosphere ?

Answers

Answer:

Carbon is an element that is essential to all life on Earth. Carbon makes up the fats and carbohydrates of our food and is part of the molecules, like DNA and protein, that make up our bodies. Carbon, in the form of carbon dioxide, is even a part of the air we breathe. It is also stored in places like the ocean, rocks, fossil fuels, and plants.

The carbon cycle describes the flow of carbon between each of these places. For example, carbon continually flows in and out of the atmosphere and also living things. As plants photosynthesize, they absorb carbon dioxide from the atmosphere. When plants die, the carbon goes into the soil, and microbes can release the carbon back into the atmosphere through decomposition.

Forests are typically carbon sinks, places that absorb more carbon than they release. They continually take carbon out of the atmosphere through the process of photosynthesis. The ocean is another example of a carbon sink, absorbing a large amount of carbon dioxide from the atmosphere.

Some processes release more carbon dioxide into the atmosphere than they absorb. Any process that uses fossil fuels—such as burning coal to make electricity—releases a lot of carbon into the atmosphere. Raising cattle for food also releases a lot of carbon into the atmosphere. These processes that release carbon into the atmosphere are known as carbon sources.

Ideally, the carbon cycle would keep Earth’s carbon concentrations in balance, moving the carbon from place to place and keeping atmospheric carbon dioxide levels steady. However, the carbon cycle is changing because of human activity. People are releasing more carbon into the atmosphere by using fossil fuels and maintaining large livestock operations. Deforestation is depleting Earth’s supply of carbon sinks. As a result, the amount of carbon in the atmosphere is rising.

Explanation:

hope this helps

mark me please

A population that is becoming less diverse because of its individuals tending to be larger is most likely experiencing selection.

Answers

Answer:

A population that is becoming less diverse because of its individuals tending to be larger is most likely experiencing directional selection. The individuals that are larger are more favoured in the population, thus becoming less diverse.

Explanation:

Answer:

Directional

Explanation:

edge 2020

Please help biology is making me mad cause it’s to much work

Answers

Answer:

..............

Explanation:

Brainliest and 30 points plz answer or no cookies for you

Explain what happened to the populations of the light and dark-colored peppered moths once the soot disappeared.

Answers

Answer:

once the soot disappeared, the moths remained a dark color and the trees stayed dark as well. Then the moths covered in soot created dark colored offspring to blend in with the tree.

Explanation:

While the release of bioactive chemicals by the plant to protect itself from the insects attack is a

Answers

adaptation to avoid predators, while the release of bioactive chemicals by the plant to protect.

This is an adaptive trait that the plant has adapted to keep itself from getting attacked by prey

What does not happen In prophase

Answers

Answer:

Prophase is first phase of cell division in mitotic phase. It is marked by disappearance of nucleolus and nuclear membrane. Condensation of chromosomes takes place. ... After that cell division or cytokinesis occurs.

Explanation:

Hi! Nice to meet you and have a great day.

a magnetic field surrounds the earth. what do you think would happen without it?

Answers

Answer: 1. we wouldn’t be able to tilt so no day and night therefore lack of sun and night causing the earth to overheat and be too cold at some point which could kill the whole population.
2. The earth would just float around, we wouldn’t have track of time, and we could float towards the sun or too far away
Never know

The respiratory systems of birds are very efficient at providing oxygen to the blood, which is necessary for birds to expend the energy necessary to fly. What feature of the bird respiratory system makes it more efficient than the respiratory systems of other animals?

Answers

Answer:

In birds, air flows through the lungs in a unidirectional manner through a bronchial system that is made up of primary bronchi, secondary bronchi, and tertiary bronchi called parabronchi, which are the functional units of gas exchange.

Explanation:

The respiratory system of birds has peculiar characteristics both in its structure and in the way its breathing is carried out. The respiratory system of birds is made up of the lungs, air sacs, trachea, bronchi, blood vessels and nerves. Compared to mammals, birds lack structures such as the ethmoid labyrinth and the thoracic cavity is not limited by the diaphragm. When the bird breathes in, the air is drawn directly from the bronchi to the posterior air sacs, where the air is stored. As the posterior air sacs expire they deflate, this causes the air to pass into the lungs, where oxygen is absorbed. The consumed air (which contains carbon dioxide harmful to the organism) is then lodged in the anterior air sacs, and the animal inhales fresh air again to send to the posterior air sacs. After exhaling the consumed air expelled from the anterior sacs (to the outside) and bringing fresh air from the posterior air sacs to the lungs. This dynamic in the respiratory system of birds, allows air movements unidirectionally through the lungs generating a higher oxygen content.

Sharing ecosystems with other species by establishing habitats that conserve
biodiversity in places where people live and work is called ecology
A life raft
B reconciliation
C reintroduction
D urban

Answers

Answer:

A

Explanation:

Hopefully this helps.

how can we make transportation better for nature?

Answers

Answer:by reducing fossil fuel along with farming industries and also humans reducing gas emissions which isn’t good for us to breathe let alone our animals

Explanation:

to build overpass with naturally grown grass as a bridge since they noemally follow the same path.

A genetic disorder in which an abnormal form of hemoglobin is produced is hemophilia. true or false

Answers

........it’s false.......

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Ground water can flow deep into an underground layer of rock called a(n)————that can store water for a long time .

a. aqueduct
b. gene pool
c. aquifer
d. sanctuary

Answers

c. aquifer: it’s a permeable rock that can contain or transmit ground water

In binary fission, are the reproduced cells genetically the same or different from each other?

Answers

Answer:

Explanation:

Match the terms to their definition.

1. speed

a rate with a denominator of 1; a rate that shows an amount of something compared to 1 of something else

2. rate

an average rate comparing distance to time

3. unit rate

a type of ratio that compares two different kinds of quantities or numbers

4. complex fraction

a fraction with fractions in both the numerator and denominator

Match the terms to their definition.

1. speed

a rate with a denominator of 1; a rate that shows an amount of something compared to 1 of something else

2. rate

an average rate comparing distance to time

3. unit rate

a type of ratio that compares two different kinds of quantities or numbers

4. complex fraction

a fraction with fractions in both the numerator and denominator

Match the terms to their definition.

1. speed

a rate with a denominator of 1; a rate that shows an amount of something compared to 1 of something else

2. rate

an average rate comparing distance to time

3. unit rate

a type of ratio that compares two different kinds of quantities or numbers

4. complex fraction

a fraction with fractions in both the numerator and denominator

Match the terms to their definition.

1. speed

a rate with a denominator of 1; a rate that shows an amount of something compared to 1 of something else

2. rate

an average rate comparing distance to time

3. unit rate

a type of ratio that compares two different kinds of quantities or numbers

4. complex fraction

a fraction with fractions in both the numerator and denominator

Match the terms to their definition.

1. speed

a rate with a denominator of 1; a rate that shows an amount of something compared to 1 of something else

2. rate

an average rate comparing distance to time

3. unit rate

a type of ratio that compares two different kinds of quantities or numbers

4. complex fraction

a fraction with fractions in both the numerator and denominator

Match the terms to their definition.

1. speed

a rate with a denominator of 1; a rate that shows an amount of something compared to 1 of something else

2. rate

an average rate comparing distance to time

3. unit rate

a type of ratio that compares two different kinds of quantities or numbers

4. complex fraction

a fraction with fractions in both the numerator and denominator

Which parts of the body are considered part of the alimentary canal?

Answers

Answer:

The mouth, pharynx, esophagus, stomach, small intestine, and large intestine.

Explanation:

HOW DO I KNOW THIS IM ONLY IN 6TH GRADE

Answer:

Oral Cavity, Oesophagus, Stomach, and Small intestine

Explanation:

Parts of the body are considered part of the alimentary canal are Oral Cavity, Oesophagus, Stomach, and Small intestine because the Oral Cavity includes the lips, the inside lining of the lips and cheeks (buccal mucosa), the teeth, the gums, the front two-thirds of the tongue, the floor of the mouth, below the tongue, and the bony roof of the mouth (hard palate).

The Oesophagus connects the throat to the stomach; which is the gullet. In humans and other vertebrates it is a muscular tube lined with mucous membrane.

The stomach is located between the esophagus and the small intestine. It secretes digestive enzymes and gastric acid to aid in food digestion. It is a muscular hollow organ in the gastrointestinal tract of humans and many other animals, including several invertebrates.

The Small intestine or small bowel is an organ in the gastrointestinal tract where most of the end absorption of nutrients and minerals from food takes place. It lies between the stomach and large intestine, and receives bile and pancreatic juice through the pancreatic duct to aid in digestion.

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Please help me it due today at 7:10pm please help me When a number is decreased by 10% of itself, the result is 27. What is the number? Simplify 2x2 - y for x = 3 and y = -2. During the Industrial Revolution, the term "technology" referred to what factor other than the physical inventions created during that time?ideas of how to use new inventionsfinances used to pay for new inventionslaws that protected new inventionsprofits made from new inventions Builders and architects use scale models to help them design and build new buildings. An architecturestudent builds a model of an office building in which the height of the model is times the height of400the actual building, while the width and length of the model are each times the corresponding200dimensions of the actual building. The model includes several triangles. Could a triangle in the model besimilar to a corresponding triangle in the actual building? Could a triangle in the model not be similar to atriangle in the actual building? Complete the explanation.A triangle that has vertices at one height only, meaning it is parallel to the ground, will have side lengths1that are each times the side lengths of the corresponding triangle in the actual building. The two200triangles are similar by the ? Triangle Similarity Theorem. A triangle that has vertices at severalheights will? have side lengths that form a constant ratio with the side lengths of thecorresponding triangle in the actual building. These triangles will ? be similar How much does it cost to travel to Australia? What is the playing surface called where the college basketball semi-finals are played? If you can bicycle 8 miles per hour, how many minutes will it take to bicycle 4 miles? What has been the most important event that has caused the American colonies to dislike, distrust, and distance themselves from Great Britain? Provide one reason to support your response. What additional regulatory measures do some state authorities demand if state funds are allocated to other government or nonprofit organizations?A. state government officials demand that the SEC should look into the financial dealings of all these organizationsB. state government officials recruit auditors to review the financial recordsC. state government officials themselves audit these organizations D. state government officials review the audit performed by CPA firms for such organizations Ancient Egyptians originally buried their dead in the Mr. Smith had 34 of a peach pie left over. He split the leftover pie among his 3 co-workers.What fraction of the pie did each co-worker receive? Which point on the demand curve represents the highest quantity demanded? A. B. C. D. can someone please help Nami is wrapping packages with green and pink ribbon.She has 11.85 meters of green ribbon and 13.4/of pink ribbon. How many more meters of pink ribbon are their than green? I needs hheeellllppppp What is the Kyoto Protocol?A) a new technology for carsB) a set of laws made in Japan that deals with how cars are madeC) a way of going about doing science on the atmosphereD) a document that sets out a plan for reducing carbon gases When carbon and oxygen combine chemically, what is true about the mass of the product?Greater than the mass of the carbon plus the mass of the oxygenEqual to the mass of the carbon plus the mass of the oxygenEquel to the mass of the carbonLess than the mass of the carbonIf youre not sure your answer is right dont answer this question! Thank you! PLZ HELP ASAP(for A P E X)What is cellular respiration?O A. Using glucose to provide energy for the bodyB. Converting sunlight to glucose to provide energy for plantsC. Exchanging O2 for CO2 in the blood within the lungsD. Building glucose from smaller hydrocarbons Which of the following explains why some audiences were not accepting of Cubism? a. It was innovative, and not all people like change. b. It wasnt realistic. c. It didnt show off the artists skills in a traditional sense. d. all of the above