Fill in the blanks to complete each statement about the age of Earth. According to scientific evidence, Earth is approximately 4.6 billion years old. Scientists used fossils and rocks dating to determine Earth’s age.
Answer
1. billion
2. radioactive
Explanation:
The three factors that created gemstones are??
I need an answer asap
Answer:
Molten rock and associated fluids. Environmental changes. Surface water. Gem formation in the Earth's mantle.
Explain what is meant by a compound. Give an example. How do compounds form?
Answer:
the two or more things that combined together is called compound.
Explanation:
example:
when the element NA and CL combine together form compound NACL.
Why is technology not the solution to all scientific problems?
Answer:
Science can not solve all of our problems. While scientific understanding can help battle things like disease, hunger, and poverty when applied properly, it does not do so completely and automatically. Furthermore, there are many areas of life where science can have little impact.
state four diseases caused by viruses
Answer:
measles, mumps, rubella, & chicken pox
Explanation:
Because viruses attack and multiply within certain cells causing disease.
Plz help ASAP thanks!!
Sodium(Na), magnesium (Mg) and sulfur (S) are all in the same_____
A:group
B: Period
They have the same number of____
A:Valence electrons
B:Electrons shells
Answer:
Sodium, Magnesium, and Sulfer are all in the same period meaning they have the same number of electron shells.
Explanation:
Periods are rows in the periodic table. The number of Valence electrons grows across the period (left to right) until reaching the electron shell's capacity.
Groups occur in columns in the periodic table and all have the same number of valence electrons, and the number of electron shells increase as you move downward on the table
what are antibiotics in brief
Answer: powerful drugs that kill bacteria or slow their growth. They treat bacterial infections, not viruses. They keep wounds from getting infected and they clean them so that nothing gets nasty and stuff like that. I hope this helps you :D
Answer:
An antibiotic is a type of antimicrobial substance active against bacteria. It is the most important type of antibacterial agent for fighting bacterial infections, and antibiotic medications are widely used in the treatment and prevention of such infections. They may either kill or inhibit the growth of bacteria
Steve is a 47 year old male who has a lot of plaque buildup in his arteries due to lack of exercise and a diet high in fats. He has recently been complaining of vision problems, chest pain, and severe headaches. His doctor informs him in his latest visit that his blood pressure is too high for his current age. What is most likely happening to the flow of blood in Steve's cardiovascular system?A. Blood flow is continuing like normal and is not affected by his high blood pressure.B. Blood flow has stopped completely which is causing his severe headaches due to lack of blood reaching the brain.C. Blood flow has increased in order to makeup for his lack of exerciseD. Blood flow is decreased below normal due to the build of of plaque in the arteries causing an increase in blood pressure.
Answer:
Blood flow is decreased below normal due to the build of of plaque in the arteries causing an increase in blood pressure.
Explanation:
When fats, cholesterol,calcium , water builds up on the endothelial lining of the Coronary arteries,reducing the diameter,and therefore impeding the flow of blood,these build up is called Plaque.The diseases condition that arise from this called atherosclerosis.
With continue build up the plaque changes in the chemical components.becomes hardened, further reducing the diameter,blood volume available and therefore oxygen supply to the targeted tissues( cardiac muscles) of the heart.This leads to Ischemic heart diseases e.g chest pain-Angina. With these strokes and other complication may follows due to cut off in oxygen and nutrients rich blood to the tissues of the brains for the heart.
The impedance to the blood flow,forced load on the heart to pump blood and therefore High blood pressure.This is the problem with Steve CVS.
During diffusion, molecules move from areas of Higher concentration to areas of Lower concentration. Diffusion does not require to move molecules. As
Answer:
The diffusion of molecules is a process that happens in our organism and the solutes move in a single direction that is always respected based on the principles of biochemistry.
Solutes always move or diffuse from compartments of higher concentration to those of lower concentration in order to equalize the amount of solute in both compartments and therefore equalize the concentrations.
Explanation:
These processes must take place between two compartments of different concentrations divided by a selective semi-permeable membrane, that is, only the solute passes and diffuses passively or actively without dragging on water or other molecules.
This process occurs in the body in those with hyper concentration of solutes in the blood in pharmacological situations.
Answer:
The answers are:
high
low
energy
Explanation:
I took this test and got these answers when the answers from other brainly members above proved to be incorrect.
what is the answer I really need it quick plz
Evolutionary processes have resulted in approximately _____________ million species, of which 1.4 million species have been described.
Answer:
1.mm
Explanation:0000000044444444444
DNA and RNA are both A. Made up of nucleotides and carry molecules from one end of a cell to another B. Monomers of protein molecules that provide structure to a cell’s nuclear membrane C. Protein molecules that carry the unique genetic information of an organism D. Molecules that contain genetic information and are made up of nucleotides
Answer:
A
Explanation:
DNA and RNA are made from nucleotides, each containing a five-carbon sugar backbone, a phosphate group, and a nitrogen base.
ASAP! What is the control variable?
Answer:
A control variable is the element that is constant. it does not change throughout the experiment as it helps researchers understand the effect of what's being tested by comparing it to the control variable.
Eukaryotes are more complex because they contain.
Answer:Eukaryotic cells are generally larger and more complex than prokaryotic cells. They also contain a variety of cellular bodies called organelles. The organelles function in the activities of the cell and are compartments for localizing metabolic function.
Explanation:
All the radiation absorbed in the Earth's atmosphere is absorbed in the stratosphere.
Please select the best answer from the choices provided
OT
OF
vit
Next
Submit
Answer:
False
Explanation:
I literally got it wrong on the quiz
Answer:
The answer is false
Explanation:
i took the test
Describe the effect of an enzyme in lowering the activation energy.
Answer:
Features of Enzyme Catalyzed Reactions
Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy. Many enzymes change shape when substrates bind.
Explanation:
Which of these statements about molecules is true? A. All molecules only contain one element
B. Two or more molecules can combine to form an atom
C.the elements in a molecule are always present in equal proportions.
D. The atoms in a molecule cannot be separated from each other by physical means
Answer:
D
Explanation:
The atoms in a molecule cannot be separated from each other by the means of physical force because they are bound to each other through chemical bonds. Thus, the correct option is D.
What are molecules?Molecules are a group of two or more similar or different atoms that form the smallest identifiable unit which can be divided into pure substances such as atoms. Molecules retain the composition and chemical properties of the substance from which it is built.
Molecules can be homogenous or heterogenous depending upon the constituent atoms. If different atoms combine to form a molecule then it is heterogenous in nature e.g., CO₂ while the molecule which is made up one type of atom is known as homogenous. Example- O₃.
Molecules have chemical bonds which are responsible for the binding of atoms, these chemical bonds can be broken by applying energy in the form of heat to the molecules.
Therefore, the correct option is D.
Learn more about Molecules here:
https://brainly.com/question/27199404
#SPJ5
Question 2 of 10
Methane gas is burned to provide heat. The chemical reaction for this
process is shown in the equation below.
CH4 + 202 -> CO2 + 2H20 + energy
What are the products in this chemical reaction?
A. O2 + CO2 + energy
B. CO2 + CH4
C. CO2 + 2H20 + energy
D. CH4 + 202
9
The chemical reaction is represented by a chemical equation where we use some basic elements like:
Reactants are kept on the left hand side.Products are kept on the right hand side.They are divided by a arrow which hear towards the products.This shows that reactants are forming or giving rise to different products in the reaction.
Back to the Question:
Here a chemical reaction is taking olace, where methane is being burnt in the presence of oxygen to form the products Carbon dioxide, water and energy.
Methane + Oxygen ➝ Carbon dioxide + water + energy.So, the arrow head is towards the CO2, H2O and energy, so they are products according to the above explanation.
Correct option is:
[tex] \large{ \boxed{ \bf{ \purple{Option \: C}}}}[/tex]
And we are done !!
#CarryOnLearning....
━━━━━━━━━━━━━━━━━━━━
Define a developing country
Answer:
a country having a standard of living or level of industrial production well below that possible with financial or technical aid; a country that is not yet highly industrialized.
Explanation:
the search for crude oil is known as
Answer: answer below.
Explanation: Research for crude oil is also known as Petroleum.
what substance does a enzyme act during a chemical reaction
List the characteristic features of epidermal cells.
Answer:
Epidermal cells are tightly linked to each other and provide mechanical strength and protection to the plant. The walls of the epidermal cells of the above ground parts of plants contain cutin, and are covered with a cuticle.
Scientific laws and theories are both based on observations and evidence how are they different?
Answer:
theory explain why something happens and laws explain what happen
Explanation:
you can remember this because in the word theory there is the letter "y" so you can remember that theories explain "y"/ why
Laws explain what happen and you can remember it bc the last letter in law is w so you can remember w is what
Answer: a theory can change into a law, but a law can't change into a theaory
Explanation:
Diarrheal disease can be caused by the microscopic protozoans...
(has checkboxes can select multiple)
[] giardia
[] amoeba
[] trypanosoma
Do hydrogen bonds require a lot of energy to break ?
Answer:
The energy required to break multiple hydrogen bonds causes water to have a high heat of vaporization; that is, a large amount of energy is needed to convert liquid water, where the molecules are attracted through their hydrogen bonds, to water vapor, where they are not.
is wind alive?
Does it grow, reproduce, respond to stimuli or evolve?
Answer:
Nope
Explanation:
Wind is neither living or dead. Wind does not grow, reproduce, respond to stimuli or evolve. Wind is just wind
The stage of the stress response in which the pituitary gland releases a flood of adrenocorticotropic hormones is
Answer:
This is Alarm.
Explanation:
Adrenocorticotropic hormones and stress.
This the hormones secreted at the corticotrophs cells of the anterior pituitary glands.Its major function is to ensure the efficient functioning of the Adrenal gland and body response to stress.It is also mediate the secretion of cortisol from the cortex of the adrenal gland into the blood stream.When it is released into the blood streams it binds to the receptors in the adrenal gland to stimulate the release of cortisol hormone.
ACTH controls diurnal (circadian) rhythm in human.This is because it peaks in the morning and progressively reduced towards the end of the day,with lowest concentration during period of sleeping.
Generally stress either by dehydration or internal complications,leads to increase in solute potential of the blood.Stress increases the activation of ACTH from the adrenal gland while boosting the concentration of cortisol. When the stress is sensed by the brain,this causes the release of corticotrophin-releasing hormone into the bllood.
The latter cause the discharge into the blood stream of ACTH via hypothalamic–pituitary–adrenal (HPA) axis.As this enters the blood it binds to the receptors for the cortisol secretions in the cortex of the adrenal gland to produce cortisol as explained earlier.Cortisol is the primary sex hormone which create the alarm.
Match the level of ecological organization described by each of the statement below. The birds,insects,plants,fungi, and other organisms that reside in a nearby wetland
Answer:
Community
Explanation:
The community is the compilation of the different plant and animal species population in a designated area at a particular time that interact with each other. The different species in a community have interactions with one another based on trophic levels and the supply and provision of nutrition for survival
The ecological level above the community level is the ecosystem, which is concerned with the biotic and abiotic interactions
Beloe the community level is the population, which are the number of a particular species in a location at a given point in time.
Which of these would be a disadvantage when forming a fossil? hard body parts buried quickly high oxygen atmosphere high pressure
Answer:
c
Explanation:
usatestprep
The disadvantage when forming a fossil is a high oxygen atmosphere, which is the second option, as the high oxygen atmosphere can lead to the rapid decay of organic matter, making it less likely to be preserved.
What is a fossil?Because oxygen is a reactive gas that can decompose organic material when exposed to high temperatures and pressures, fossils will be destroyed in such a climate, which is why fossils are more commonly found in environments with low oxygen levels, such as deep underwater sediments or anaerobic environments like swamps and bogs. One of the main factors that determines whether or not an organism will be fossilized is the speed at which it is buried after death, if an organism is buried quickly, it is less likely to be disturbed or exposed to scavengers.
Hence, the disadvantage when forming a fossil is a high oxygen atmosphere, which is the second option.
Learn more about the fossil here.
https://brainly.com/question/2288828
#SPJ6
the question is incomplete, complete question is below
Which of these would be a disadvantage when forming a fossil?
hard body parts buried quickly
high oxygen atmosphere
high pressure
The function of the nucleic acids contained in the body cells of an organism is -
Answer:
Explanation:
Nucleic acids are the main information-carrying molecules of the cell, and, by directing the process of protein synthesis, they determine the inherited characteristics of every living thing. The two main classes of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).