Exothermic reactions release heat, as seen in combustion processes, while endothermic reactions absorb heat, as seen in the reaction in cold packs. Even exothermic reactions, however, require a small amount of initial energy input, known as the activation energy. The strength or weakness of bonds in the reactants and products also influences whether a reaction is exothermic or endothermic.
Explanation:Endothermic and exothermic reactions differ in terms of heat absorption and release. An exothermic reaction is a process that releases heat. An example of this is the combustion reaction that occurs when using an oxyacetylene torch; this process releases energy in the form of both heat and light.
On the other hand, an endothermic reaction is a process that absorbs heat. An example is the reaction that occurs in a cold pack, used for treating muscle strains. When water and salt like ammonium nitrate in the pack are combined, the mixture absorbs heat, resulting in a sensation of cold.
It's also important to note that even exothermic reactions require a small amount of energy input to initiate, known as the activation energy. In terms of bond energies, exothermic reactions result when the bonds in the products are stronger than those in the reactants. Conversely, endothermic reactions occur when the bonds in the products are weaker than those in the reactants.
Learn more about Endothermic and Exothermic Reactions here:https://brainly.com/question/31862179
#SPJ11
6. Plants produce oxygen during photosynthesis. However, plants must also use atmospheric oxygen during the process of respiration.
Which can best bo concluded from this Information?
.. Plants undergo respiration through aerobic processes.
C. Plants use all of the oxygan they produce during respiration.
b. Plants undergo respiration through anaa robic processes.
d. Plants use the oxygen from carbon dioxide during respiration.
...
L
e
ela havala
LE
Answer:
Plants use the oxygen from carbon dioxide during respiration.
which of the following sentences is the best example of a hypothesis
a. UV radiation does not cause skin cancer.
b. chickens lay more eggs when they are happy.
c. why does the earth orbit around the sun?
d. how many types of organisms are there?
Answer:B
Explanation:
when i was in middle school they told us an hypothesis was an educated guess/outcome.
Answer:a
Explanation:I got it wrong on a test and then it showed what the answer was I listened to the other person on here but got it wrong
Your mom is making a salt solution for you to gargle with because you have a sore
throat. She fills a glass with warm water and adds two teaspoons of salt.
The water is the solvent.
True
False
Answer:
False.
Explanation:
It's false because the salt is what makes your throat fell less sore. Sure the water helps dissolve the salt, but the salt does most of the work.
Answer: FALSE
Explanation:
how is physiology of a bone related to its anatomy
Bone physiology is intimately connected to its anatomy, as the structure of bones dictates their function in body support, protection, and movement. The continuous remodeling of bone as well as specific anatomical features, like the arrangement of hand bones, exemplify the form-function relationship.
Explanation:The physiology of a bone is deeply related to its anatomy because the physical structure of bone (its anatomy) determines how it functions (its physiology). Bones are not inert structures; they are dynamic and continuously remodeled throughout one's life to adapt to various stresses. Bone remodeling is a physiological process where approximately 10% of bone mass is turned over annually. This ongoing process helps the bone maintain its strength and adapt to the mechanical load it is subjected to.
Bone's structure is a composite of organic collagen and inorganic hydroxyapatite that provides the necessary strength to support body weight. The outer portion, called cortical bone, is dense, while the inner part, known as cancellous bone, is spongy. This specialized structure enables bones to perform their physiological functions, supporting body structures, protecting organs, and facilitating movement in conjunction with muscles.
Similarly, the anatomy of the human hand, with its unique arrangement of bones, reveals a close relationship with its function; the thumb's opposition to the four fingers allows for complex manipulations like pinching, grasping, and typing. Understanding the anatomy and physiology together enhances comprehension of how form and function are correlated in living organisms.
Describe the property of water that is indicated by the data. How is this property explained by the structure of water molecules and the bonds between them?
Water's cohesive property, which makes it stick together in drops, is due to its molecular structure that facilitates hydrogen bonding. The polarity of water molecules leads to the formation of hydrogen bonds, which makes water a structured liquid with high surface tension.
The Property of Cohesion in Water
The property of water indicated by the data is its cohesive nature. Water molecules exhibit a strong tendency to stick together, forming drops rather than existing as separate molecules. This behavior is most visible when observing water dripping from a leaky faucet or accumulating in dew drops.
The cohesive property of water is explained by the molecular structure of water, or H₂O. Each water molecule consists of one oxygen atom covalently bonded to two hydrogen atoms, creating a polar molecule with a partial negative charge on the oxygen and partial positive charges on the hydrogens. This polarity allows water molecules to form hydrogen bonds with each other, where the oxygen of one water molecule attracts the hydrogen of another. These bonds create a network that holds the molecules together, contributing to water's high surface tension and its ability to form drops.
Hydrogen Bonding in Water
Hydrogen bonding is the molecular structural feature responsible for many of water's unusual properties. The bond is relatively weak on its own, but when many hydrogen bonds form between water molecules, they collectively create a stable, structured liquid. This extensive hydrogen bonding is what gives water a high boiling point, high heat capacity, and the ability to dissolve numerous substances, which is why water is often called the 'universal solvent'.
In essence, the structure of water molecules and the network of hydrogen bonds between them are the keys to understanding why water behaves in such distinctive ways compared to other molecules of similar size.
Which of these best defines “environmental science”?
A The study of how humans interact with the environment
B The study of life
C The study of the properties and changes of matter
D The study of how plants interact with the environment
Answer:
A or/and D
Explanation:
Environmental science is the study of how organisms interact with their environment so it can be either a or d. I would say a combination of both.
The study of how A. Human interacts with the environment is considered as best definition for environmental science.
Explanation:Environmental science is the investigation of the cooperation between the physical, concoction, and organic segments of nature. It comprises of various subjects like geography, hydrology, soil sciences, plant physiology, and environment.
Ecological researchers may have preparing in more than one order; for instance, a geochemist has mastery in both geography and science. With the knowledge of all these filed, the interaction between human and the natural world is researched and studied.
Is solar energy an ecosystem service? why or why not
Answer:
Yes
Explanation:
It is using the sun's energy as an energy resource and is therefore eco friendly
Answer:This is because they are producers and other organisms gain energy from them. Solar energy plays a very vital role here, because the process of photosynthesis, which takes place in plants, is incomplete without solar energy. Therefore, we can say it is an ecosystem service.
What is the correct definition of speed?
Answer: Speed: the rate at which someone or something is able to move or operate.
Answer:
The speed is defined as the rate at which a particular object covers a certain amount of distance. This speed can be fast or slow. An object covering a great distance in short period of time indicates a high speed and an object covering small distance in a large period of time depicts a slow speed.
This can be mathematically calculated.
Speed= Distance/Time
The unit of speed is meter/second. It can also be written as m/sec.
What can Courtney change in her experiment to find the true impact of
the type of meals she eats on her race time?
Select one:
A. For two weeks of her study, she can eat her high protein meal
for breakfast and high carbohydrate meal for lunch; she should
then switch the meals for the last two weeks.
B. She should try running a longer distance after lunch since
she seems to be faster regardless of her meal. C.She should only eat her high protein meals for breakfast and
only eat her high carbohydrate meals for lunch for all four weeks
of her study. D. She should eat only protein meals on some days and only
carbohydrate meals on other days, which can be determined by a
coin toss.
Final answer:
Courtney should randomize her diet by eating only protein meals on some days and only carbohydrate meals on others based on a coin toss to truly understand the impact of meal type on her race performance.
Explanation:
To properly assess the impact of the type of meals on her race time, Courtney should implement a controlled experiment that isolates the variable of the meal composition. The best option here is:
Option D. She should eat only protein meals on some days and only carbohydrate meals on other days, which can be determined by a coin toss. This randomization will help minimize the effect of other variables and allow her to assess the true impact of meal type on race performance.By comparing her race times on days following a high-protein meal to days following a high-carbohydrate meal, she can see which diet might be more beneficial for her performance. It's essential to remember that many distance runners carb load before a race because carbohydrates are stored as glycogen in the muscles and liver, providing a ready source of energy for endurance activities. Eating complex carbohydrates is a common practice so that the body has stored energy to tap into during the run.
Which two characteristics describe all animals?
Answer:
Heterotrophic and Multicellular
Explanation:
Answer: Multicellular and Eukaryotic
please give me brainliest if i was right
Which of the following statements describes a feature shared by mitochondria and the endoplasmic reticulum that increases the efficiency of their basic functions?
A. They have rigid, non-fluid membranes.
B. They have highly folded membranes.
C. They have membranes composed of many carbohydrates.
D. They have double membranes, with one membrane enclosed within the other.
Answer:
The answer is B. They have highly folded membranes.
Explanation:
A highly folded structure is advantageous for microscopic organelles such as the mitochondria and the endoplasmic reticulum. These organelles need to produce high amounts of ATP and proteins in a day, respectively.
For the endoplasmic reticulum, with ribosomes attached, it is responsible for the manufacturing, packaging, and transport of specific proteins. Same goes for the mitochondria, which is responsible for energy production and respiration. These processes are so demanding that in order to be more efficient in being productive, the highly folded membranes provide a wider and better surface area for synthesis of proteins or ATP, despite the size of these organelles.
A feature that is shared by mitochondria and the endoplasmic reticulum that increases the efficiency of their basic functions is B. They have highly folded membranes.
It should be noted that a highly folded structure is advantageous for microscopic organelles like the endoplasmic reticulum and the mitochondria.It should be noted that the organelles need to produce high amounts of ATP and proteins. For the endoplasmic reticulum, it manufactures, packages, and transports some specific proteins.The mitochondria is responsible for energy production and respiration. They've to be efficient in carrying out their functions effectively, they have highly folded membranes.In conclusion, the correct option is B
Read related link on:
https://brainly.com/question/13363690
An atom of the element zinc has an atomic number of 30 and a mass number of 65. How many protons does an uncharged zinc atom have?
the element zinc has 30 protons
Explanation:
Atomic number is the sum of all the number of protons present in an element. And, mass number is the sum of total number of both protons and neutrons present in an element.
When an atom is neutral in nature then its number of protons is equal to its number of electrons.
Since, it is given that atomic number of zinc is 30 so, it means that number of protons will also be 30.
Thus, we can conclude that there are 30 protons in an uncharged zinc atom.
Which gas is found in high percentages in the atmosphere in all of the gas
giants?
O A. Nitrogen
O
B. Hydrogen
O
O
C. Carbon monoxide
O
O
D. Oxygen
O
E. Carbon dioxide
///Apex\\\
Answer:Nitrogen is found in a highest amount in Atmosphere.It is found in 78%
Explanation:
Answer:
Hydrogen
Explanation:
10 POINTS
If many experiments and ample evidence support a hypothesis, then it becomes a
theory.
True
Or
False
Answer:
True.
Explanation:
A hypothesis is a possible explanation to an unexplained situation that is based on limited or not enough evidence. Therefore, this explanation has not been proven.
If, through scientific experiments and research, enough evidence is gathered to prove this explanation to be true, then it becomes a theory. A scientific theory generally integrates various hypothesis to support it. This allows a theory to change through time as more hypothesis are developed, creating a more accurate and reliable theory.
how does bacteria affect the nitrogen cycle??
Answer: The bacteria break down organic material that contain nitrogen and release it back into the cycle.
For example, bacteria breaks down a leaf, then it will release the nitrogen into the soil for plant.
why do some molecules need help moving across a cell membrane in the form of energy
Answer:
Because that molecules are moving against a concentration gradient and they can not freely pass trough the membrane.
Explanation:
Cell membranes are constituded by lipid bilayers with an hidrophobic nature. This means that water or molecules disolved in water can not freely pass the membrane. All these molecules are in a bigger concentration outside the cell, so the transport inside cells will be against a concentration gradient and this type of transport requieres energy.
Some molecules need help to move through the cell membrane in the form of energy because transport occurs against the concentration gradient and, therefore, the molecules require an energy supply.
The transport in cells is carried out through their membrane by different mechanisms, in order to enter nutrients and eliminate waste.
Many molecules can pass through the membrane without difficulty, but there are others that, due to their composition, it is not easy to do so and therefore require an energy supply.
For this there is the active transport of molecules, it requires energy to be carried out, since it is a type of movement where molecules go against the concentration gradient (from a place of lower concentration to one of higher concentration) and it is carried out by means of pumps, a clear example is the pump that transports sodium and potassium.
If the cells were unable to carry out this transport, the organism would not carry out its vital activities.
Therefore, we can conclude that some molecules need energy to move across a cell membrane because they go against the concentration gradient.
Learn more here: https://brainly.com/question/11921222
Please select the word from the list that best fits the definition
apparent movement of a star used to measure its distance from Earth
parallax
light-year
main sequence
H-R diagram
white dwarf
fusion
elliptical galaxy
barred spiral galaxy
irregular galaxy
Milky Way Galaxy
Answer: parallax is the best answer
Answer:
The correct answer is the option 1: Parallax
Explanation:
Parallax is the name given, in the field of physics, to the term that refers to the alternation or displacement in the apparent position of an object that is being watched between two different lines of sight and being measured at the same time by the angle of those two lines. In addition, that statement declares the well known ''principle of parallax'', which is used by the astronomers to measure large distances, such as the example of the question of the apparent movement of a star used to measure its distance from the Earth.
An organism has two different possible traits, A
and B. A graph of the population is shown right.
Which of the following statements is true about
Trait B? Check all that apply.
Answer:
A-It decreased in frequency over time.
Explanation:
did it and got 100
Answer: It decreased in frequency over time.
Explanation: :)
what type of material is found in the atmosphere?
A. A mixture of magma and superheated water.
B. An incompressible fluid of molten rock
C. Solid Rock
D. A viscoelastic fluid of molten rock
Answer: D.) A viscoelastic fluid of molten rock
Explanation: The layer below the lithosphere , the upper layer of the mantle of the earth with high heat pressure .It is made up of almost solid rocks but also flows not which indicates that it consist of viscoelastic fluid of molten rocks.This is because in some regions there can be presence of molten rocks.
What is the volume of 65.4cm
Answer:
If you mean 65.4cm³, then the volume would be 279726.264 centimeters³
Explanation:
which organism is NOT made up of 1or more eukaryotic cells?
A.) a dog
B.)dandelion
C.)radiolarian
D.)methanogen
Answer:
D
Explanation:
Methanogens are prokaryotes and therefore have prokaryotic cells. They are single-celled archaea. They are found in hypoxic conditions like the first stomach of ruminants where they digest molecules like cellulose and produce methane as a byproduct. The rest are composed of eukaryotic cells which are much larger than prokaryotic cells and their organelles are membrane-bound (unlike prokaryotes).
What is the mass of milliliter of pure water? What about 1 L of water?
kinda 1 milliliter (ml) of water weighs 1 gram (g). The prefix in front of the unit tells you how to move the decimal. 1 milliliter = 0.001 liters because "milli" means "thousandth". 1 "thousandth" of a liter = 0.001 liters.
What is the best description of the word ‘recessive’ as it is used in biology?
Answer: c an allele that is only express if two versions of it are present in a cell
Explanation:
Which correctly describes a difference between the male and female
reproductive systems? A. Only females produce gametes
B. Males have a monthly cycle.
C. Only males are fertile.
D. Females produce gametes less often.
Answer:
Females produce gametes less often.
Explanation:
Females produce gametes less often.
The statement females produce gametes less often correctly describes a difference between the male and female reproductive systems.
What are the functions of reproductive system?The reproductive system of an organism, also known as the genital system, is the biological system made up of all the anatomical organs involved in sexual reproduction.
The tissues, glands, and organs involved in producing offspring (children). In women, the reproductive system includes the ovaries, the fallopian tubes, the uterus, the cervix, and the vagina.
The primary reproductive organs are the gonads, which produce the gametes and hormones. The secondary, or accessory, structures transport and sustain the gametes and nurture the developing offspring.
Learn more about reproductive system:
https://brainly.com/question/14235396
#SPJ7
a molecule is the smallest part of what?
Answer:
A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms.
Explanation:
A molecule is the smallest part of a substance that can have the properties of that substance.
What is a molecule?A structure by the chemical bonding of two or more two atoms is called a molecule. The molecule is the smallest part of a substance that has the same properties as a substance.
For example, a molecule of water had the same properties as that of water. If it is broken down into its constituent atoms, hydrogen and oxygen, these atoms will have completely different properties than that of water.
Molecules are structures that form the basics of the study of chemistry. Molecules are written with the symbol of their constituent atom with a number as a subscript representing the number of those atoms in the molecule.
For example, a molecule of water is represented by the formula H₂O, where H₂ represents that there are two atoms of hydrogen per atom of oxygen.
Therefore, the molecule is the smallest part of a substance that can have the properties of a substance.
Read more about molecules, here
https://brainly.com/question/14362857
#SPJ2
Which kingdom does not classify autotrophic organisms?
Archaea
Eubacteria
Fungi
Protista
Answer:
Fungi, it's the only one that's not microscopic
Fungi, it's the only one that's not microscopic.
What are Autotrophic organisms?An organism that can make its own nourishment by the use of light, water, carbon dioxide, or other substances is an autotroph. Autotrophs are also referred to as producers because they make their own nourishment.
Although plants are the most well-known autotroph, there are numerous more types of autotrophic creatures. Algae, which are aquatic plants that are recognized by their larger forms as seaweed, are autotrophic.
The majority of autotrophs produce their food through a process known as photosynthesis. In photosynthesis, autotrophs use the sun's energy to turn carbon dioxide from the air and water from the soil into glucose, a nutrition.
Therefore, Fungi, it's the only one that's not microscopic.
To learn more about autotrophic organisms, refer to the link:
https://brainly.com/question/29477668
#SPJ6
When listing the levels of organization in organisms from smallest to most complex which level is just below organs in complexity?
In a prokaryotic cell, most ribosomes are
Answer: cytosol
Explanation:
Ribosomes are special because they are found in both prokaryotes and eukaryotes. While a structure such as a nucleus is only found in eukaryotes, every cell needs ribosomes to manufacture proteins. Since there are no membrane-bound organelles in prokaryotes, the ribosomes float free in the cytosol.
Answer: floating freely in the cytoplasm.
Explanation: i just got it right
Complete this sentence: The activities of enzymes depends on the __________, __________ conditions, and the __________ of the surroundings.
Answer:
The activities of enzyme depends on the temperature, ionic conditions and the pH of the surroundings.
Explanation:
Effect of temperature on enzymes
Enzymes show low level of functioning at lower temperatures. As the temperature is raised, the activity of the enzyme increases. The enzyme activity becomes optimal at a specific temperature. Beyond this temperature, the enzyme's activity rate starts to decline until it gets denatured.
Effect of ionic conditions on enzymes
Studies show that certain enzymes require some cations for functioning. But an increased amount of cations or anions can inhibit the functioning of the enzymes.
Effect of pH on enzymes
Each enzyme has an optimum pH at which it works best. If the pH is increased or lowered than this optimum pH, then the activity of the enzyme starts declining until it gets denatured. Most enzymes work best at pH 7.0
Human population increased sharply during the _____ because of improvements in farming techniques.
A Hunter-gatherer period
B Agricultural revolution
C Period of prehistory
D Industrial Revolution
B. During the agricultural revolution, there were vital new improvements in farming techniques that made a sharp increase in human population.
Explanation:The agricultural revolution began in Great Britain between the mid-17th century and the late 19th century. It brought new crops and grains and also new methods of farming and agriculture. Good irrigation system and drainage facilities also helped to increase the productivity of the crops.
An immense increment in farming output and productivity during the agricultural revolution added to the growth of the population. The farming revolution made a surplus of nourishment, so fewer people started to die of starvation. Statistics demonstrate that the revolution of agriculture committed a global rise in population.