Answer:
D
Explanation:
many chemical changes can be smelled, or heard, etc. And can be seen on a molecular level. Chemical changes create new substances:
Na + Cl = NaCl
What is reproduction?
a. A formation of new traits
b. The process of producing new living things
c. The creation of living things from nonliving materials
d. The ability to make offspring using energy from the sun
Answer:
B
Explanation:
Reproduction is when a living thing mates and is capable of making another living thing. That means it's the process of NEW living things, because it's being created. Hope that helps:)
Answer:
Option B (The process of producing new living things)
Explanation:
Further answer:
reproduction is the process of producing new living things which is possible only in living things (not non-living things)..
animals, plants and humans can reproduce...
Imagine you have been shipwrecked and are floating on a small piece of wood in the middle of the ocean. You are terribly thirsty and take a drink of seawater (3.5% salt). What do you think happens to your stomach cells (1% salt), and why?
Given the higher salinity of the ocean water in comparison to your stomach cells, you will lose water from your cells and become dehydrated.
Osmosis is a phenomenon that shows that in the presence of a space in which the solute concentration is higher than its current location, water will travel towards that more concentrated space in an attempt to dilute the concentration.
The urge to drink is what we call being thirsty. This urge has a biological origin. It is the body's way of telling you that your cells need more water, which leads us to often consume any water we have available. This is not always in our best interest.
However, due to osmosis, drinking the seawater would only have a negative effect on your stomach cells. As stated in the question, the cells contain less concentration of solute (in this case salt) than the water. This means that instead of entering the cell, water would leave to dilute the new seawater, thus dehydrating you more and worsening your condition.
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What was the purpose of the experiment?
Type your answer here:
How can you identify the gas produced in a chemical reaction without observing the atoms and molecules directly? Explain.
Type your answer here:
Write a hypothesis based on observations and scientific principles.
Type your answer here:
Experimental Methods
What tools or materials did you use to collect your data?
Type your answer here:
Describe the procedure that you followed to conduct your experiment.
Type your answer here:
Data and Observations
Record your observations.
Type your answer here:
Conclusions
What conclusions can you draw about the identities of the gases produced in each chemical reaction? Write an evidence-based claim.
Type your answer here:
Based on your observations, which equation best models the reaction of vinegar (C2H4O2) and baking soda (NaHCO3)? Explain.
Answer:
What was the purpose of the experiment?
Type your answer here: The purpose of the experiment was to perform and observe the results of a variety of chemical reactions. To become familiar with the observable signs of chemical reactions. To identify the products formed in chemical reactions and predict when a reaction will occur. To write balanced equations for the reactions studied.
Explanation:
sorry i can only tell you the first one
Introduction
What was the purpose of the experiment?
The purpose of this experiment is to create CO2, also known as carbon dioxide, and observe chemical reactions.
How can you identify the gas produced in a chemical reaction without observing the atoms and molecules directly? Explain.
If I look at how the gas would react or its qualities, I can identify the gas without having to observe its atoms directly.
Write a hypothesis based on observations and scientific principles.
I hypothesize that the mixture produced carbon dioxide, an acidic and colorless gas. In addition to organic materials, such as leaves and dirt, carbon dioxide is also produced when they decay.
Experimental Methods
What tools or materials did you use to collect your data?
To conduct my experiment, I used a glass cup, baking soda, vinegar, paper to record my observations, and a match.
Data and Observations
Record your observations.
The baking soda and vinegar made bubbles and some steam. When I put the match above the glass, the flame went out.
Conclusions
What conclusions can you draw about the identities of the gases produced in each chemical reaction? Write an evidence-based claim.
The chemical reaction of CO2 caused the flame to go out.
Based on your observations, which equation best models the reaction of vinegar (C2H4O2) and baking soda (NaHCO3)? Explain.
"C" _"2" "H" _"4" "O" _"2" +"NaHC" "O" _"3" →"Na" "C" _2 H_3 "O" _"2" + "H" _2 "O"+"C" "O" _2
"C" _"2" "H" _"4" "O" _"2" +"NaHC" "O" _"3" →"Na" "C" _2 H_3 "O" _"2" + "H" _2 "O"+"O" _2
"C" _"2" "H" _"4" "O" _"2" +"NaHC" "O" _"3" →"Na" "C" _2 H_3 "O" _"2" + "H" _2 "O"+"H" _2
"C" _"2" "H" _"4" "O" _"2" +2"NaHC" "O" _"3" →"Na" "C" _2 H_3 "O" _"2" + "H" _2 "O"+"C" "O" _2
The equation that best models the reaction of vinegar is A
Because "C" _"2" "H" _"4" "O" _"2" is the acid vinegar
"NaHC" "O" _"3" is the baking soda
"Na" "C" _2 H_3 "O" _"2" + "H" _2 "O"+"C" "O" _2 is the product or the reaction.
What is ocean sequestration?
Answer:
it is the process by which carbon dioxide is removed from the atmosphere, is achieved through various chemical and biological processes
3. Charles went to check out the salad bar, and told his friend;
"I can just come here every day and have Caesar salad for
lunch. I will cut down on the salad dressing" What would be the
most appropriate advice to give Charles at this time?
O a. This salad will likely meet your needs of vitamins, minerals
and fiber.
b. This salad can allow you to use kcalories remaining in your
daily energy allowance to consume some added sugar.
O c. This salad can make it difficult for you to get enough nutrients
without gaining weight.
O d. You need a variety of vegetables every day, and from all of
the subgroups every weeks.
O e. It is important to eat the same amount of salad every day.
Answer:
I think the answer is letter D
The most appropriate advice to give Charles at this time about Caesar salad is - a. This salad will likely meet your needs of vitamins, minerals, and fiber.
A classic Caesar is one of the simplest salads out there. it is a mix of romaine lettuce, parmesan cheese, and croutons.
It has a high content of calories in comparison to the other salads.Caesar salad is well-known for being unhealthy, and that is mostly due to its dressing.If dressing is removed from it then the salad would be a better option for lunch. Without dressing it provides vitamins, fat, fiber, and minerals to the body.Thus, the most appropriate advice to give Charles at this time about Caesar salad is - a. This salad will likely meet your needs of vitamins, minerals, and fiber.
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What effect did meteor strikes have on the early
formation of Earth's crust?
4. (3 pts.) In aerobic respiration, oxygen is necessary to accept the final electrons at the end of
the electron transport chain. What happens when a person cannot bring oxygen into the body
(maybe they stop breathing)? What energy molecule will not be generated? How will this affect
the organism?
Answer:
their body starts shutting down and this will cause slow and painful death
Explanation:
Which of the following levels of organization is the smallest and simplest?
a. chemical level
b. cellular level
c. organ system level
d. organ level
Answer:
celllular level, chemical level, organ level, and organ system level
Explanation:
Organ system level is the is the smallest and simplest in the levels of organization.
What is Organ system level?It is one of the smallest and simplest levels of organization in which includes:atoms molecules organelles cells tissues organs organ systems and the human organism.So, Organ system level is referred as the smallest and simplest in the levels of organization. (option c)
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A family builds a home on top of a hill. The hill has several large trees but almost no grass or shrubs. The family wants to prevent the soil on the hill around the house from continuing to erode. Describe a strategy that would help them stop the erosion.
Answer:
Remove trees to add less weight and the house should be fine after.
5514998054 ps:- 123456
What are some ways that chromosomes can be structurally abnormal
Answer:
Delations: A portion of the chromosome can be missing or deleted
Duplications: A portion of the chromosome is duplicated resulting in extra genetic material
Translocations: A portion of one chromosome is transfered to another.
One species has 24 chromosomes, and another species has 26 chromosomes. If these two species are crossed, how many chromosomes will their offspring have?
Species A : 2N = 24, N = 12
Species B : 2n = 26, n = 13
During the hybridization N + n = 25
Population Dynamo
1
A population of alligators lives in a wetland habitat. Which of these describes a density-dependent factor that could affect this
population?
OA. A drought that lasts for several months occurs.
ОВ.
A hurricane passes through the area.
OC. Humans introduce pollutants into the water of the ecosystem.
OD
There is a decrease in prey animals in the ecosystem.
Reset
PLEASE NEED HELP
Submit
Answer:
D) there is a decrease in prey animals in the ecosystem
Explanation:
a density dependent factor is one of the following:
dieses
competition
predation
only one makes sense answer is D)
What is the genotype?
A A trait that will not be seen in the next generation of offspring.
B A trait that is hidden by another trait.
C The makeup of genetic material.
D What the trait looks like.
Answer:
C. La composición del material genético.
Explanation:
Answer:
The makeup of genetic material.
What is the endosymbiotic hypothesis?
Answer:According to the Endosymbiotic Theory, the mitochondria and chloroplast in eukaryotic cells were originally aerobic bacteria (prokaryotes) that were consumed by a huge anaerobic bacterium (prokaryote).
The role of a control in an experiment is
A. Ensure the experiment can be repeated
B Prove a hypothesis is correct
C Provide a basis of comparison to an experimental group
D Prove that a hypothjesis is correct and ensure repeatability
Answer:
C.
Explanation:
Hope it helped you brainiest plz and thank you!!!!!!
Primary productivity is not limited by _______.
a.
the availability of sunlight
b.
time
c.
the availability of nutrients
d.
access to water
Please select the best answer from the choices provided
A
B
C
D
BRAINLIESTTT!!!! :DD
Endocrine communication involves chemical signaling via the release of hormones into the extracellular fluid. From there, hormones diffuse into the bloodstream and may travel to distant body regions, where they elicit a response in target cells. Endocrine glands are ductless glands that secrete hormones.
Answer:
l think its takes proteins out of the cell
Question 1): Photosynthesis and cellular respiration are often described in two ways: 1) they are chemically opposite; and 2) they have a relationship to each other. Explain what these two statements mean. Be sure to include the specific substances used and released by each process. Question 2) Your skin is constantly producing new cells through cell division. How does this happen? During interphase, how does a cell prepare for division? Describe cell division, including the processes of mitosis and cytokinesis. Be sure to describe the mitotic steps. Question 3) Mitosis and meiosis are similar processes, but they have some very important differences. Explain how mitosis and meiosis are alike and how they are different. Provide at least two similarities and three differences. ( Please Do Not Repost Someone Else's Answer that is on Brainly Or Any Other Websites) Will Mark Brainliest .
Explanation:
Mitosis produces two cells from one parent using one division event. But meiosis produces four new child cells with two divisions, each of which has half the genetic material of its parent. Mitosis takes place all over the body, while meiosis only takes place in the sex organs and produces sex cells.
5. Once the caffeine is removed from the plant
materials, how might the caffeine be recovered
from the supercritical Co,?
F. by forcing the Co, back through the plant
materials
G. by lowering the temperature and pressure
of the CO2
H. by changing the polarity of the caffeine
molecules
I. by using a harsher solvent
Answer:
Option C
Explanation:
Caffeine is actually supercritical carbon dioxideLowering the temperature will cool it down and can make dry ice kinda situationPressure must be low alsoOption G is correct
Theo mô hình Operon Lac, vì sao protein ức chế mất tác dụng
Imagine that the climate in your region became extremely arid, and freshwater became a scarce and precious resource. Wasteful uses of water, such as watering lawns and filling swimming pools, would be strictly outlawed, and water from the municipal water supply would cost 100 times what it does now. Discuss how you would adapt to that situation.
100 pts brainiest
One way to adapt to this situation would be by reducing water use to strictly necessary activities and collecting water from alternative sources such as rain.
What would change in this situation?Due to scarcity, in this situation, people could not use water for recreation such as water in pools, and in general water usage is limited.
How to adapt to this situation?Possibilities are restricted in this situation since it is not a good idea to continue using water excessively. Instead, the best is to:
Adapt to the change by limiting water use to necessary activities such as cooking.Try to find out alternative water sources such as collecting water when it rains.Learn more about water in: https://brainly.com/question/4381433
Explain how fingerprints are formed, and any instances where individuals tried to remove their prints.
Answer:
from the marks on the fingers
Pollution has negative effects on plants, animals, and people. Which choice would be least likely to cause water pollution?
Answer:
plants
Explanation:
because animals can maybe poop or pee on the water .and also people are the same too.so plants are the least likely to cause water pollution
1. Convection current causes the lithospheric plate to
A. move slowly but constantly
B. move faster
C. move in any direction
D. create another plate
______________________
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CAN YOU BRAINLEST ME
How are the cells in the circulatory system helping me in the action of kicking a ball?Do some have specific jobs?
Answer:
Exercise causes the heart to pump blood into the circulation more efficiently as a result of more forceful and efficient myocardial contractions, increased perfusion of tissues and organs with blood, and increased oxygen delivery. Aerobic exercise trains the heart to become more efficient.
Explanation:
What is hypothesis in paramecium homeostasis
Answer: osmosis
Explanation: water moves into the organism by osmosis and pumped out by the contractile vacuole . the concentration of solutes in the water will determine the rate of contractions in paramecium
If a liquid turns into a solid, what is happening to the energy in the liquid?
or the liquid maintains it's energy
What is the purpose of strand B?
a.) To act as a template for the synthesis of messenger RNA
b.) To carry the code from the DNA molecule in the nucleus to the ribosome
c.) Delivers specific amino acids to the ribosome to make proteins
d.) Transfers nucleic acids to the nucleus
Answer:
The answer is a)
Explanation:
Hope it is helpful for you ✌️
Chamges in blood are automatically and routinely made by the body In order to direct appropriate amounts of________and________to specific parts of the body?
Help Asap!!
Answer:
What is Oxygen & Nutrients
Explanation:
Changes in blood are automatically and routinely made by the body In order to direct appropriate amounts of OXYGEN and NUTRIENTS to specific parts of the body.
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