Answer:
Dependent variable - sleep times
Independent variable - jazz music/silence
Control group - Group 1. The group that was kept in a silent room
Experimental group - Group 2. The group placed in a room with jazz music.
Explanation:
The dependent variable is the actual variable to be measured during an experiment. The value of the dependent variable is dependent on the independent variable supplied. In this case, the dependent variable is the duration of sleep of the different groups.
The independent variable is supplied by the experimenter and is often manipulated to see the effects it will produce on the dependent variable. In this case, the jazz music and the silence in the rooms respectively represent the independent variable.
The control group receives no treatment variable and represents the group that is often used as the benchmark to measure the effects of treatment variables on experimental subjects. In this case, the control group is the group that was placed in a room without jazz music.
The experimental group is the group that receives the treatment variable and in this case, the group that slept in the room filled with jazz music.
Dependent Variable: The dependent variable in this experiment is the sleep duration or the length of time each participant slept.
Control Group: The control group in this experiment is the group of people placed in a quiet room where they went to sleep without any jazz music playing. This group serves as a baseline for comparison to evaluate the effects of jazz music on sleep duration.
Independent Variable: The independent variable in this experiment is the presence or absence of jazz music while falling asleep and throughout the night.
Experimental Group: The experimental group in this experiment is the group of people placed in a room where jazz music played softly as they began to sleep and continued to play throughout the night. This group is exposed to the independent variable (jazz music) to test its effect on sleep duration.
The purpose of this study is to determine if the independent variable (jazz music) has an impact on the dependent variable (sleep duration) by comparing the control group's sleep duration to that of the experimental group.
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The pulmonary circulation carries blood between the heart and ______
Answer:
lungs
Explanation:
Pulmonary circulation moves blood between the heart and the lungs. It transports deoxygenated blood to the lungs to absorb oxygen and release carbon dioxide. The oxygenated blood then flows back to the heart. Systemic circulation moves blood between the heart and the rest of the body.
Which colors were absorbed best by the plant
Answer:
the flower part or red flower like rose
Explanation:
because roses are best known as ornamental plants grown for their flowers in the garden and sometimes indoors. They have been also used for commercial perfumery and commercial cut flower crops. Some are used as landscape plants, for hedging and for other utilitarian purposes such as game cover and slope stabilization.
Which of the following is NOT true about matter in the biosphere?
a) Matter is transferred in one direction through the biosphere. b) Biogeochemical cycles transform and reuse molecules. c) The total amount of matter decreases over time. d) Human activity does not affect the movement of matter
Answer:
c) The total amount of matter decreases over time.
Explanation:
The statement 'the total amount of matter decreases over time' is NOT true about the matter in the biosphere (Option c).
The biosphere refers to the total of all ecosystems of the Earth.The biosphere can be defined as a closed system in terms of matter because matter does not enter or exit.In the biosphere, the total amount of matter remains constant over time, whereas the total amount of energy decreases over time.This energy is lost in the form of heat when it spreads from the Earth's surface and outward into space.In conclusion, the statement 'the total amount of matter decreases over time' is NOT true about the matter in the biosphere (Option c).
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During a science lab the teacher provided Michael with a triple-beam balance, a ruler, and four cube-shaped metals. Michael correctly calculated the densities of the objects and compared his calculations with the data table below. Based on Michael's calculations and the table below, which conclusion can be BEST made?
Iron has the highest density.
Aluminum has the lowest density.
Weight is used to determine density.
Substances can be identified by their density
THE ANSWER IS D YOU ARE WELCOME
During a science lab the teacher provided Michael with a triple-beam balance, a ruler, and four cube-shaped metals. Based on Michael's calculations and the table below, the conclusion can be BEST made Substances can be identified by their density
what is density?
Density refers to the mass of a unit volume of a material substance. The formula for density is represented by d = M/V, where d is density, M is mass, and V is volume.
It is commonly shown as units of grams per cubic centimeter, it can also be expressed as kilograms per cubic meter .
Density can used to define how different materials interact when mixed together. For example Wood floats in water because it has a lower density, while an anchor sinks because the metal has a higher density.
Density can be applied in pipe design, shipbuilding, helium balloons, weight distribution in the aero plane, and the fact that ice floats on water.
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Selena learns that, as specialized cells mature, certain organelles increase in
quantity while other organelles may disappear. She also learns that muscle cells
require large quantities of energy in the form of ATP. Based on this, she can predict
that muscle cells would contain an unusually high number of
A Lysosomes
B Ribosomes
C Rough endoplasmic reticulum
D Mitochondria
Explanation:
rewatch the video your teacher provided on edunity
Answer:
mitochondria
Explanation:
muscles need energy for contraction and lots of mitochondria is what helps them do this
The rock in the image is marble, which has many layers and is extremely hard. It was formed under high heat and pressure. Marble is an example of
rock changing into
rock.
Answer:
Marble is a metamorphic rock.
Explanation:
Metamorphic rocks were once igneous or sedimentary rocks, but have been changed as a result of intense heat and/or pressure within the Earth's crust. They are crystalline and often have a “squashed” texture.
will mark brainliest ⚠️⚠️ please help
Answer:# 1 is salt #2 is fresh #3 fresh #4 salty
Explanation:
Roberto stepped onto the hot sand at the beach. Realizing it was hot, he quickly moved to the shaded area. Which two systems worked together to move him safely into the shade so that he doesn't hurt his feet? A. Nervous and muscular B, Nervous and cardiovascular C. Cardiovascular and respiratory D. Immune and muscular
Answer:
A. Nervous and muscular
Explanation:
The thermoreceptors of the sensory afferent pathway were activated when they perceived high temperatures, and after that they sent a signal to the CNS for it to execute the "withdrawal" reflex in the face of danger or pain.
The reflex act is an immediate and unconscious action, like walking, and like other movements that are coordinated between the CNS, SNP, NEUROMUSCULAR PLATE AND MUSCLE.
Which of the following is true regarding enzymes?
A one enzyme can work with any substrate
B they can be used extracellularly
C they are made of only protein
D they are used entirely in the reaction
Answer:
C .they are made of only protein
Enzymes can be used extracellularly. Therefore option B is correct.
Enzymes are biological catalysts that facilitate chemical reactions in living organisms.
While enzymes are highly specific in their action, option A is incorrect because each enzyme typically works with a specific substrate or group of related substrates.
Option C is also incorrect because enzymes can be composed of both protein and non-protein components, such as cofactors or coenzymes.
Finally, option D is incorrect because enzymes are not used up entirely in the reaction but rather can be reused multiple times, making them efficient catalysts.
Therefore option B they can be used extracellularly is correct.
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Explain the role of the ozone layer in sustaining life on Earth.
Answer:
The O3 layer, (Ozone Layer) leads a greatly significant role in sustaining life on Earth. It acts as a barrier against the harmful UV rays from the Sun. The Ozone and Oxygen molecules are able to absorb a staggering 95% to 99.9% of the ultraviolet radiation travelling to our planet. When this ultraviolet radiation is absorbed, heat is generated.
Answer:
The ozone layer helps regulate the Earth’s temperature by absorbing a large percentage of the UV radiation entering the atmosphere. This protects living organisms from exposure to large amounts of UV radiation, maintains livable climates, and regulates the amount of harmful ground-level ozone.
Explanation:
edg 2020
Which of the following is an important part of scientific methods? Select all correct answers.
formulating conclusions
making hypotheses
traveling to distant places
performing experiments
Answer:
Making a hypotheses and performing experiments
I Hope this helps you uwu
Explanation:
Making hypotheses and performing experiments to prove them are important parts of the scientific method.
What is a hypothesis?A hypothesis is a given explanation to understand some observation from the real world by using the scientific method.
This explanation (hypothesis) must be tested (either confirmed or rejected) by experimental methods.In conclusion, making hypotheses and performing experiments to prove them are important parts of the scientific method.
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Which of the following is NOT true of proteins?
a. they form muscle, skin and hair
b. they are found in food
c. they are a main source of energy
d. they are sensitive to pH and temperature
How Clark Developed Seizures
The following list is not in the correct order. The first three events are numbered correctly. Drag and drop the
remaining events in the order that led to Clark's seizures.
picture above for the order.
Answer:
4. Low blood sodium concentration
5. Net movement of free water into the matrix
6. Increased matrix pressure
7. Abnormal neuron firing rate
8. Seizures
Explanation:
Seizures are defined as the common complication of drug intoxication.
As per the clinical observations for Clark , normal blood and matrix sodium concentration lose sodium ions due to diarrhea. As given too much water causes sodium levels to decrease. Due to lower sodium concentration, the free water move into the matrix and increased matrix pressure. This pressure causes the abnormal neuron firing rate to increase which causes seizures.
Hence, the correct order is:
4. Low blood sodium concentration
5. Net movement of free water into the matrix
6. Increased matrix pressure
7. Abnormal neuron firing rate
8. Seizures
Match each earthquake or volcanic feature with its description.
will mark brainliest
Answer:
1. Simple fold in rock layers
2. Magma that squeezes into rock layers in a vertical sheet
3. Break in rock formed by colliding plates; produced by compressional stress
4. Break in rock formed from plates moving parallel to each other, creates shear stress
5. Feature formed from rock and ash
6. Feature formed from layers of ash and lava
7. Raised block of rock between two normal faults
8. An underwater volcano that never surfaces
9. Earth's crust that rises high in elevation from colliding continental plates
10. Very large, bowl-like features formed from an explosive eruption
hope this helps! :-)
The earthquake or volcanic feature with its description is given below:
1. Monocline - Simple fold in rock layers.
2. Di-ke -Magma that squeezes into rock layers in a vertical sheet.
What is earthquake ?The term earthquake is defined as a weak to violent shaking of the ground formed by the sudden movement of rock materials below the earth's surface. The earthquakes produced in tectonic plate boundary.
3. Reverse fault - Break in rock formed by colliding plates; produced by compressional stress
4. Strike slip fault - Break in rock formed from plates moving parallel to each other, creates shear stress
5. Cinder cone volcano - Feature formed from rock and ash
6. Composite volcano - Feature formed from layers of ash and lava
7. Horst - Raised block of rock between two normal faults
8. Seamout - An underwater volcano that never surfaces
9. Foudaid mountain - Earth's crust that rises high in elevation from colliding continental plates
10. Caldera - Very large, bowl-like features formed from an explosive eruption
Thus, Magma that squeezes into rock layers in a vertical sheet is called as di-ke.
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Scientists use tissue cultures to study possible medicines that can be used to treat cancer patients. What is one benefit of this procedure?Which best describes cancer cells?
Answer:
The answer is A. Patients do not receive harmful or ineffective medication.
Explanation: Test
Answer:
The answer is A) Patients do not receive harmful or ineffective medication.
Explanation:
I got it right
what characteristics are affected by genetics?
Answer:
Well.
Explanation:
1. Weight
2. Height
3. Chronic Diseases
4. Skin color
5. Eye color
6. Race
7. Hair color
8. And the overall shape of your whole body (ie, head shape)
Answer:
The characteristics that are impacted by genetics are :
-The eye color
-The nose shape
-Hair color
-Face shape
-Skin color
-And any type of beauty mark someone has
What part of the cell gives ribosomes instructions on how to assemble protein?
Answer:
The nucleus (plural, nuclei) houses the cell's genetic material, or DNA, and is also the site of synthesis for ribosomes, the cellular machines that assemble proteins.
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1. What is the main purpose of binary fission? *
A. To produce an egg and a sperm cell
B. To produce a new organism (like bacteria)
C. To produce a new organ
D. To differentiate
Answer:
Answer A or B
Explanation: I say its a or b because if your in biology then this would mostly likely be your answer. Also when for one two daughter cells would usually go for sperm and egg cells but at the same time binary fission can be used for making for bacteria. If it were me i would choose B, but test your luck.
In some developing nations, the percentage of animal protein from fish in the diet can be as high as____. 20 percent 80 percent 10 percent 40 percent
Answer:
18 percent
Explanation:
1. What are the three most familier states of matter?
Answer:
gas, liquid, solid
Explanation:
I could also list 12 other states of matter if you're interested
Answer: Solids, liquids and gases are the most familiar states of matter.
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Which type of earthquake will be most destructive
O shallow focus with 4.5 magnitude
O
deep focus with 4.5 magnitude
shallow focus with 3.5 magnitude
O deep focus with 3.5 magnitude
Answer:
b
Explanation:
shallow focus with 3.5 magnitude would be very big because its shallow.
Which type of rock forms as a result of cooling and crystallization?
igneous
metamorphic
clastic
sedimentary
Identify two genetic disorders and state how their karyotypes differ from a normal
karyotype due to a chromosomal abnormality.
PLEASE HELP ILL GIVE BRAINLIEST
Answer/Explanation:
Down's syndrome - individuals with Down Syndrome have an extra copy of chromosome 21 (trisomy 21). This causes affected individuals to have learning disabilities as well as a range of health problems such as heart problems, growth delay, and characteristic facial features.
Turner syndrome - individuals with Turner Syndrome only have one X chromosome, but no Y chromosome (written XO). They are phenotypically female, but lacking the second X chromosome. This means they have underdeveloped ovaries, and are infertile. They also have a range of other features such as a short stature, a thick neck, and heart issues.
Answer:
yes
Explanation:
just did it
Southern Florida has many tropical hardwood hammocks—forest habitats that are warm, wet, and populated with many broad-leaved evergreen trees. Why might a plant native to an ecosystem with a cooler climate do well if introduced to a tropical hardwood hammock? Group of answer choices The trees in the tropical hardwood hammock are better at competing for native resources than the introduced species are. The wet conditions in the tropical hardwood hammock disrupt the life cycle and limit reproduction of the introduced species. Freezing temperatures that normally limit the population in the cooler climate are lacking in the tropical hardwood hammock. Pollinators and seed carriers that normally increase the population in the cooler climate are lacking in the tropical hardwood hammock.
Answer:
Freezing temperatures that normally limit the population in the cooler climate are lacking in the tropical hardwood hammock.
Explanation:
The tropical hardwood hammocks are habitats that act as small ecosystems markedly different from the surrounding environment, and they may be seriously threatened by introduced plant species. In Florida, exotic plants have been introduced into the tropical hardwood hammock habitat, reaching to about 50% of the flora in some areas. The mature hammock of these habitats can generate a shade that maintains a temperature of several degrees cooler compared to their neighboring habitats, and thereby promoting invasion by exotic species.
What would be the difference in precipitation patterns for a climatogram of a grassland versus a desert?
Answer:
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If a person combat the disease without a vaccine introduced to his body,such immunity is known as
natural active immunity
natural passive immunity
Artificial active immunity
artificial passive immunity
Answer:natural active immunity
Explanation:lol it took too long
Which is the answer A B C Or D
Answer:
I believe that it might be choice A, but I'm not entirely sure.
Xavier observes a fully lit moon. When can he expect to see the moon look like this again?
In about 12 hours
In about 24 hours
In about 15 days
In about 30 days
Answer:
In about 30 days
Explanation:
Assume Xavier sights a full moon today, it'll take around 29.5 days to see the moon at that size again.
Analysing each of the given options, only option D answers the question because 29.5 days can be rightly said to be about 30 days.
Or better still, 29.5 days approximates to 30 days.
Why is the following molecule nonpolar and hydrophobic?
The image shows a polymer composed of a chain of 14 carbon atoms. The first carbon atom is bound to three hydrogen atoms. The next 12 carbon atoms are bound to two hydrogen atoms. The final carbon atom is bound to a carboxyl group.
The carbon and hydrogen atoms share electrons equally.
The glycerol molecule in fats contains a carboxyl group.
There are exactly three fatty acid chains present in each fat molecule.
There is an unequal distribution of hydrogen and oxygen atoms.
Answer:
a
Explanation:
The following molecule is nonpolar and hydrophobic because the carbon and hydrogen atoms share electrons equally. The correct option is A.
What are nonpolar and hydrophobic?Non-polar molecules are those which can not be dissolved in water. These molecules have ends that are not dissolved in water. Hydrophobic is a quality of the substance that is not dissolved in water or repels water.
The image shows a polymer made up of three hydrogen atoms are bonded to the initial carbon atom. Two hydrogen atoms are joined to the next 12 carbon atoms. A carboxyl group is attached to the last carbon atom.
Since charges fluctuate, a momentary dipole moment exists in a so-called nonpolar molecule.
Thus, the correct option is A, The carbon and hydrogen atoms share electrons equally.
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