The answer is C.
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Answer: The least reactive non-metal is Selenium.
Explanation:
Chemical reactivity is defined as the tendency of an element to loose of gain electrons.
Non-metals are the elements which gains electrons and hence, their chemical reactivity will be the tendency to loose electrons.
Their chemical reactivity decreases as we move from top to bottom in a group. As, the electrons get added up in the new shell. So, the the electron in the outermost orbital gets far away from the nucleus. And hence, the electron will be difficult to gain.
Their chemical reactivity increases as we move from left to right in a period because the valence shell come closer to nucleus as we move from left to right. So, addition of new electron in the valence shell becomes easier due to greater attraction between nucleus and valence electron.
For the given options:
Option A: Sulfur
Sulfur (S) is located in period 3 and group 16 of the periodic table.
Option B: Chlorine
Chlorine (Cl) is located in period 3 and group 17 of the periodic table.
Option C: Bromine
Bromine (Br) is located in period 4 and group 17 of the periodic table.
Option D: Selenium
Selenium (Se) is located in period 4 and group 16 of the periodic table.
Hence, the least reactive non-metal is Selenium.
Louis Pasteur was a german microbiologist and chemist in during the 1860’s. True or false?
Answer:
The statement is False.
Explanation:
Louis Pasteur was not a German Microbiologist, instead he was a French Microbiologist and Chemist. In 1822, he was born in France. He confirmed that microorganisms such as bacteria are responsible for fermentation and souring the food products. In 1862, he demonstrated that bacteria can be killed by boiling and cooling the liquid. This process is called pasteurization. He also discovered the first vaccine for chicken cholera which lead the development of vaccines for other diseases like anthrax and smallpox.
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Which of the following is an example of evidence supporting the theory that volcanic eruptions caused the dinosaurs to become extinct?
A. Massive lava flows in India date to the same time period.
B. A thin layer of rock containing iridium formed at that same time period.
C. Many sea creatures became extinct at the same time as the dinosaurs.
D. Volcanoes often form along boundaries between the sections of Earth's crust called plates.
d. volcanoes often form along boundaries between sections of the earths crust called plates
What is the best explanation as to why the Thwaites Glacier is melting so rapidly?
Answer:
Carbon dioxide has been released by the burning of fossil fuels. This process is increasing the ocean's water temperature resulting in the glacier melting
Explanation:
The carbon dioxide emissions have constantly been on the rise ever since the Industrial Revolution occurred. The burning of the fossil fuels is the main reason why there is such high quantity of this gas released into the atmosphere. The carbon dioxide is a greenhouse gas, thus it contributes to the arming up of the atmosphere. Because the atmosphere is warming up, the water is warming up as well. The higher temperature of the water results in melting of the glaciers, such as Thwaites Glacier. As the process continues, more and more of the glacier will be melted, with the end result being relatively big rise of the sea level.
Please Help Me!!!!! It will be very appreciated!!!!! SCIENCE
Answer:
A
Explanation:
Please I need help especially on number 3
Answer:Producers : Sun
First Level Consumers is the water plants
Second Level Consumers is the shrimp
Third Level Consumers is the Great Blue Heron
Explanation:
Basically it is like what makes it's own food (PRODUCER)
What eats the producer is called a consumer because it does NOT produce it's own food.
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Of the six kingdoms, which are prokaryotic and which are eukaryotic?
Organisms are classified into three Domains and into one of six Kingdoms of life. These Kingdoms are Archaebacteria, Eubacteria, Protista, Fungi, Plantae, and Animalia.
Using the model provided, which statement would not be correct regarding ATP
Answer:D
Explanation:
When a phosphate group is removed from ATP by hydrolysis, ADP is produced and energy is stored for cellular processes the statement is not correct regarding ATP, hence option D is correct.
When the high-energy phosphoanhydride bonds in adenosine triphosphate (ATP) are broken, such as in muscles, chemical energy that had been stored in these bonds is released through the catabolic reaction process known as ATP hydrolysis.
When a phosphate group is removed from ATP, ADP is produced and energy is provided for cellular processes, hence option D is correct.
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What determines the maximum rate at which a renewable resource can be harvested?
A. Desalination
B. Sustainable yield
C. The nitrogen cycle
D. Siltation
Sustainable yield determines the maximum rate at which a renewable resource can be harvested.
Answer:
B. Sustainable yield
Explanation:
Sustainable yield refers to the maximum yield of energy from a renewable resources while ensuring its availability to the future generation. Being eco-friendly in nature, they do not cause any pollution. These resources are harvested up to the level of their optimum yield only to ensure no harm to the future generations.
Which phrase describes the phenomenon that implies that small atmospheric changes affect the weather weeks or months later?
the butterfly effect
short-range forecast
long-range forecast
automated weather
Answer: The answer is a) the butterfly effect
Explanation:
Answer:
Option A: The butterfly effect
Explanation:
The butterfly effect shows that a small change results in large effect. The change initially is small but the resulting effect is of large variation.
The phenomenon that implies that small atmospheric changes affect the weather weeks or months later. This is a result of butterfly effect that a small change in atmosphere affects whether.
Which of the following must be true in a dry limestone cave? Select all that apply. A. Water once entered the cave. B. The cave was formed by volcanic means. C. Any cave formations are no longer growing. D. There must only be stalagmites, no stalactites.
Option b is correct..
Caves are formed by the dissolution of limestone. Rainwater picks up carbon dioxide from the air and as it percolates through the soil, which turns into a weak acid. This slowly dissolves out the limestone along the joints, bedding planes and fractures, some of which become enlarged enough to form caves.
Which component of blood transports oxygen?
Answer:
Red blood cells.
Explanation:
Answer:
Hemoglobin
Explanation:
Hemoglobin which is found in red blood cells help transport oxygen to the lungs and other body parts.
scientists use the light year to describe the relationship between object in space. what does light year measure?
A) the distance that light can travel in one year
B) the time it takes light to travel 1 million km
C)the brightness of light that travel through space
D) the number of years it takes light to travel to earth
Answer:
The answer is B
Explanation:
The definition of a light year is the unit of astronomical distance, though it is called a light year it is actually a measurement of distance, so the answer, "the time it takes light to travel 1 million km is the correct answer.
Scientists use the light year to describe the relationship between objects in space. Light year is the distance which an object takes to travel one one year. Thus, the correct option is A.
What is a light year?A light-year is a large unit of length which is used to express astronomical distances and is equivalent to about just 9.46 trillion kilometers, or 5.88 trillion miles. It comprises of the distance which light travels in the interstellar space.
A light year is a unit of measuring distance. Light year is used to measure the distance of other celestial bodies as well from the earth. A light year is the distance which a beam of light travels in a single earth year.
Therefore, the correct option is A.
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Precipitation that enters a watershed and is not absorbed into the soil is called _______.
A. saturated
B. runoff
C. snow
D. groundwater
runoff is the answer
Runoff is the term used for precipitation that enters a watershed and is not absorbed into the soil. It typically flows into bodies of water and is a vital part of the water cycle.
Explanation:Precipitation that enters a watershed and is not absorbed into the soil is called runoff. Runoff can occur for a variety of reasons, such as when the ground is already saturated with water, or the rain falls too quickly for it to be absorbed. This runoff flows into rivers, streams, and other bodies of water, becoming a key part of the water cycle.
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What does experimental mean
Answer: Based on untested ideas or techniques and not yet established or finalized
describe 2 observation of water that provide evidence that water molecules are attracted to one another
The capillary action and water's solubility property demonstrate the attraction between water molecules. The former is seen when water ascends a straw or capillary tube because of water's adhesive properties. The latter is shown when substances like table salt dissolve in water due to the strong attraction between polar water molecules and the ions in salt.
Explanation:There are two clear observations that provide evidence that water molecules are attracted to one another. These observations refer to the water's property of adhesion and cohesion.
Firstly, the phenomenon called capillary action demonstrates how water molecules are attracted to each other. This effect is observed when water climbs up a straw or capillary tube, which occurs because water molecules are more attracted to the charged surfaces of the tube than to each other, inducing the water to adhere to the tube's surface and move upward.
Secondly, water's solubility property provides another evidence of the attraction between water molecules. For instance, when you dissolve table salt in water, the polar water molecule's attraction to the ions (Na+ and Cl-) in salt overcomes the ionic bond in the salt, resulting in its dissolution. Conversely, non-polar substances like oils do not mix with water, because the attraction among water molecules is stronger than the attraction between water and oil molecules.
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which statements best describes the damage that results from earthquakes ? check all that apply
• amount of damage can be used to determine intensity
• damage can be measured using the Richter scale
• earthquakes that cause maximum damage are not common
• Roman numerals are used touring damage created by an earth quake
Answer: damage can be measured using the Richter scale
The amount of damage can be used to determine intensity would be the answer to your question
The summer solstices occurs around June 21st and is the longest day of the year in the northern hemisphere. On this day, the Sun is as far ______ as it will get at sunrise and sunset. A) east B) north C) south D) west
Answer:
B) north
Explanation:
On June 21st we have the summer solstice in the Northern Hemisphere. This is the longest day of the year in the Northern Hemisphere and officially it marks the beginning of the summer. On this date, the sun gets the furthest north during sunset and sunrise on the Northern Hemisphere. This is the case because that is when the Northern Hemisphere is the most tilted and exposed to the sunlight. Basically, the further north the Sun appears on the sky in the Northern Hemisphere, the more sunlight there will be and the higher the temperatures will be as well.
Methane hydrates are _______. a.
a potential new source of natural gas
b. the largest reserve of methane on Earth
c. releasing methane as the arctic warms
d. all of the above
Please select the best answer from the choices provided
A
B
C
D
Answer:
all of the above
Explanation:
Methane hydrates are compounds that are crystalline solid in nature and are composed of water and low molecular weight gases mostly, methane gas.
They form under low temperature, high pressure and appropriate concentrations of methane gas.
Methane hydrate deposits are the largest hydrocarbon resource than oil, natural gas, and coal resources.
Most methane hydrates deposits contain small amounts of other hydrocarbon hydrates.
Answer: D. all of the above
Explanation:
Because ....
It is a potential new source of natural gas.It is also the largest reserve of methane earthAnd It is releasing methane as the arctic warms. Arctic methane releases methane from soil and seas.* Hopefully this helps:) Mark me the brainliest:)!!
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3. How often does the sun's magnetic field reverse?
A. Every 11 years
B. Every two million years
C. Every 100,000 years
D. Every 350 days
Answer:
A. Every 11 years
Explanation:
It happens at the peak of each solar cycle as the sun's inner magnetic dynamo re-organizes itself. The coming reversal will mark the midpoint of Solar Cycle 24.
The sun's magnetic field reverses A. Every 11 years.
The Sun's magnetic field undergoes a complete reversal of its polarity approximately every 11 years. This phenomenon is known as the solar magnetic cycle or the solar cycle. The cycle starts with the Sun's magnetic field being oriented in a particular direction, and over the course of about 11 years, it gradually flips its polarity, with the north and south magnetic poles interchanging.
The solar magnetic cycle is driven by the complex processes occurring within the Sun's interior. It involves the generation and interaction of magnetic fields through processes such as differential rotation, convection, and the dynamo effect. These processes generate and amplify the magnetic fields, leading to the periodic reversal of the Sun's magnetic polarity.
Therefore, the correct answer is A. Every 11 years.
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During a trip to the Galapagos Islands, which observation led Charles Darwin to suspect that organisms change over time?
Answer:
Beaks of birds for example are specific to what food is around them.
Explanation:
Answer:
prolly "Island finches resembled mainland finches, but were not the same species."
Explanation:
it's not "Island finches did not have beaks of the same size and shape."
Hydrilla (Hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in Florida. Hydrilla has already been introduced to hundreds of bodies of water throughout Florida. Hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions.
Part A: Describe how hydrilla affects native plant and animal species. Include both a biotic and an abiotic limiting factor.
Part B: Suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla.
Part A: Invasive species displace native species in their habitat hence reducing biodiversity that is necessary for a balanced ecosystem. This is because invasive species do not have a natural predator in their new environment and hence their growth is unchecked. They, therefore, take up much of the nutrients and other biotic factors utilized by the other species.
Part B; To deal with invasive species, one can introduce a predator of the invasive species into the environment. Another is the influencing a limiting factor (usually an abiotic factor) that affects the invasive species specifically. These will check the unregulated growth of invasive species and preserve the ecosystem’s biodiversity.
Identify the statement about meiosis that is incorrect
Select one:
a. Pairing of homologous chromosomes
b. Four haploid cells are formed
c. At the end of meiosis the number of chromosomes are reduced to half
d. Two cycle of DNA replication occurs
Answer:
the answer is d)
Explanation:
i think the reason why it is d) is because during meiosis the there shouldn't be any dna that are carbon copies because all living things that are made sexually has different dna ( except identical twins of course)
The incorrect statement about meiosis is 'd. Two cycles of DNA replication occurs.' In reality, DNA replication occurs once before Meiosis I, after which two rounds of cell divisions create four haploid cells.
The statement about meiosis that is incorrect is: d. Two cycles of DNA replication occurs. In meiosis, DNA replication occurs only once, during the S phase of the cell cycle prior to the first meiotic division. Following this, there are two rounds of cell divisions known as Meiosis I and Meiosis II, which result in four haploid cells from one diploid parent cell. During Meiosis I, homologous chromosomes pair up and may exchange genetic material through crossing over. Afterwards, these homologous chromosomes are separated into two cells. Meiosis II resembles mitosis where the sister chromatids within the two daughter cells are separated, resulting in a total of four haploid cells. These events ensure that at the end of meiosis, the number of chromosomes is reduced to half in each of the four haploid cells produced.
Which product of photosynthesis contains the chemical energy that was made from the radiant energy
Answer:
Eukaryota cells contains chloroplast that uses the radiant energy of sunlight to convert CO2 and H2O into carbohydrates.
Explanation:
If the genetic material In two nuclei fuses together to form a zygote in this an example of sexual or asexual reproduction? What types of cells fused together and what process created those cells
Fusion of genetic material to form a zygote is an example of sexual reproduction, where a sperm and an egg gamete, created through meiosis, fuse together.
Explanation:When the genetic material in two nuclei fuses together to form a zygote, this is an example of sexual reproduction. During sexual reproduction, specialized haploid cells called gametes fuse together. In most species, these gametes are sperm and eggs, produced via a process called meiosis. Meiosis is responsible for creating haploid cells from a diploid cell, ensuring genetic variety and the continuation of species. A zygote is a diploid cell because it combines the genetic material from two gametes, each from a different parent, leading to a genetically unique organism.
in the pre-industrial era settlements were more likely to be near sources of surface water than in the idustrial era true or false
Answer:
This statement is true.
Explanation:
16. What type of organism utilizes photosynthesis to produce food?
A. Heterotrophs
B. Autotrophs
C. Sharks
D. Frogs
Answer:
B
Explanation
Autotrophs make their own food so photosythesis is autotrophic
Autotrophs!
Autotrophs are plants and they make their own food through photosynthesis
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How much faster is the Arctic warming compared to the rest of the world?
Answer:
Twice
Explanation:
According to the latest studies about the global warming and how it affects part of the world, the research has shown that the Arctic is warming up twice as fast as the rest of the world. This should not really come as a surprise as the Arctic is not consisted of land mass, but instead of ocean water. The ocean water needs slightly lower temperature to freeze, so it is easier for it unfreeze. Once it unfreezes it moves and it becomes part of the global water circulation patterns. This results in bring in more warmth to the Arctic through the ocean currents, which also results in more melting of the ice, so the rate of warming up is constantly increasing.
The students are performing an experience that involves chemicals.
Based on the picture, what safety practice did both students fail to carry out?
A.) properly disposing
B.) keeping the work environment clean
C.) using proper laboratory equipment
D.) wearing appropriate laboratory attire
Answer:
your answer will be D. wearing approiate labotary attire
Explanation:
The student clearly has no gloves on may hurt themselves doing the lab teacher should've had told the kids the rules and what to expect and what to do
Answer:
The correct answer will be option-D.
Explanation:
A scientific experiment involving chemicals must be performed with precautions as chemicals can cause serious health problems like carcinogens causing cancer.
The laboratory attire of a lab includes a face mask to cover mouth, a pair of goggle to protect eyes, hand gloves to protect hand and a laboratory coat to protect body and clothes.
Since in the given question, the hand gloves and laboratory coat are missing, therefore, option-D will be considered the most valid answer.
Determine the expected genotypes and phenotypes for the Punnett square
you have to give the alleles so that I can determine the phenotype
Answer:
WE NEED THE PUNNET SQUAR
Explanation:
which organisms in this food web are producers? please select the two correct answers
A - Green Algae
B - Roseate spoonbills
C - Mangroves
D - Mangrove water snakes
E - American Crocodiles
Answer:Green algae and mangroves.
Explanation: Both on those organisms have chlorophyll and chloroplasts, and they are considered as plants.
Answer:
Option A and option C are the correct option,
Explanation:
A. Green algae are autotrophs like plants and produce their own food by photosynthesis. They also have chloroplasts for photosynthesis. In this food web they are bottom of the the web that suggests too that green algae is the producer.
C. Mangroves are the group of plants found in the intertidal coastal area. Mangroves also make their own food by the process of photosynthesis.