Which of the following is a compound?

A. Cl2
B. H2O
C. He
D. H2

Answers

Answer 1

B is the compound because a compound is two or more different atoms that combine.


Related Questions

Describe what scientists can learn about the past by studying fossils.

Please don't say something random to get the points. It's not fair to others. :[

Answers

they could possibly learn the climate the animal was from or even relative dating & absolute age



One way the body fights invaders is by increasing the body temperature or running a fever. Give a brief explanation as to why that defensive technique works against some viruses or bacteria.  


Answers

An increase in body temperature has been known since ancient times to be associated with infection and inflammation and elevated body temperature changes the T-cells' membranes which may help mediate the effects of micro-environmental temperature on cell function

Answer:

Some of the species of bacteria do not possess the tendency to work adequately and replicate in the conditions of fever, that is, high temperatures. Thus, the high-temperature condition minimizes the rate of bacterial infections in the body. The majority of the research has also demonstrated that the temporal elevation in the body temperature, at the time of fever, enhances the activity of the cytotoxic T-cells, which plays a substantial role in fighting against the infection.  

why dont electrons just fly off into space? what holds them in orbit around the nucleus

Answers

electrons don't just fly off into space because charged particles attract each other, keep in mind that alike particles repel off each other.

electromagnetic forces hold the electrons in orbit around the nucleus in the center of the atom. As they move in a repetive motion, they stay close together to stay in line.

Hope this helps!!

Which describes a way that carbon is pulled out of the atmosphere?

A. When oil is burned

B. When trees use photosynthesis

C. When animals exhale

D. When fossils fuels are used

Answers

Answer: B. When trees use photosynthesis

How is diversity related to changes in the ecosystem?

Answers

Diversity within an ecosystem allows for variation in the species and environment interact with each other.

Diversity within an ecosystem allows for variation in the species and environment interact with each other.

How does the way matter cycles through an ecosystem differ from the way at energy flows?

Answers

Not similar to matter, flow of energy has a one way flow through living things. On the other hand, matter is recycled within and between ecosystems.  Living things (ecosystems) need nonliving matter as well as energy.  Matter is used to build bodies. It's also needed to carry out the processes of life.  Any nonliving matter that living things need is called a nutrient. Carbon and nitrogen are examples of nutrients.  Unlike energy, matter is recycled in ecosystems.

The ecosystem is a collection of communities of biotic and abiotic nature. The ecosystem channels energy in cyclic pathways and is unidirectional.

The matter is thus get recycled within and among the ecosystems. As every organism needs nutrients and energy to perform tasks. Like water, the nutrients are passed from one form to another such as from one tropic level to another.

Learn more about the way matter cycles by an ecosystem differ from the way at energy flows.

brainly.com/question/12242820.

the earth surface is kept warm mostly by _______.A.hot lava B. the sun C. the moon D. many distant stars

Answers

B.  The sun.  It is the closest star to Earth.  The moon does not heat up the Earth like at all.  The distant stars are too far away to have an effect.  The hot lava is in the Earth so it doesn't affect the surface.

What is the name for the resources and money attributed to a specific region?


A. Government


B. Law


C. Economy


D. Norm


Apex Environmental Science

Answers

The answer C.) Economy (or also reffered to as money)

What is the name for the resources and money attributed to a specific region?

The answer is option C. Economy            

Economy is defined as a country's system of money making and its uses. It describes the wealth and resources of any country or a region. This process also shows ways of money making and its usage and means of production in any country.    

Which scenario could be a negative consequence of an earthquake?

A. Greenhouse gases are released into the atmosphere
B. The power grid is temporarily or permanently disrupted
C. Eutrophication Block sunlight from reaching aquatic plants
D. Soil and sand creep bends
the trunks of trees

Answers

Answer: D. Soil and sand creep bends the trunks of trees.

Explanation:

An earthquake can be define as the shaking of the earth surface. This occurs due to generation of intense seismic waves in the geosphere.

Soil and sand creep is a condition which occurs during earthquake. In this process downward movement of sand or soil takes place downhill due to the effect of gravity. This pressure exerted by the surface soil will lead to the bending of the tree trunks.

Answer:

D.

Explanation:

plato/edmentum

Identify 3 reasons organisms need energy..

Answers

Organisms need energy to survive, as cells can't survive on their own without it. They need energy for growth, reproduction, movement, and repair. Hope this helps!

Which is true of the population shown in this graph? A. It shows the effect of overpopulation on a species. B. The number of individuals will eventually drop to zero. C. The population has increased until it reached its carrying capacity. D. There are no limiting factors to control population growth.

Answers

The answer to this is C.

Answer:

The answer is C

Explanation:

The person on top of me is correct just if you're still not sure is this answer is correct or not.

check the box next to the process or processes used by organism listed oak tree

Answers

Answer:

Oak trees performs cellular respiration and photosynthesis so both boxes should be checked

Explanation:

"Plants" (seaweeds are not strictly plants) all can perform photosynthesis, in which they use chlorophyll to convert solar elergy into chemical energy (glucose). But they can also carry out respiration which is the opposite process. In respiration glucose is broken down and its stored energy is released and used as fuel for the organism's processes.

Conversely, animals such as the housefly, the rabbit and the crab in the lower part of the image, can only perform respiration.

Answer:

You’re welcome

Explanation:

Which resources are needed for life on Earth? Check all that apply. water rocks air trees sunlight

Answers

The correct answers are:

- water;

The water is the essential substance used for the functioning of the living organisms. It is included in the process of photosynthesis, as well as for the bodily functions.

- rocks;

They are the mineral base, thus they provide food source. Also, the rocks are the mother material for the creation of the soils.

- air;

The air has to be just right in order for the organisms to survive. Its composition has to be consisted of elements that are useful for the living organisms.

- sunlight;

The sunlight provides heat, thus it enables the formation of suitable environments, as without it, the Earth would be very old and frozen. It is also crucial for the process of photosynthesis.

Answer:

water, air, sunlight

Explanation:

I just took it

name the 3 texas river that form borders and the neighboring states that they border

Answers

Sabine river. Red river. rio grande

The three rivers that form borders in Texas are the Rio Grande, Red River, and Sabine River, which border Mexico, Oklahoma, and Louisiana, respectively.

The three Texas rivers that form borders and their neighbouring states are:

Rio Grande - This river forms a natural border along the southern edge of Texas, separating it from the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas.Red River - It serves as the boundary between Texas and Oklahoma to the north.Sabine River - This river creates the border between Texas and Louisiana to the east.

Each of these rivers plays a significant role in the geography of Texas, and they have also been important in historical contexts, such as the Texas annexation and border disputes.

Which of the following statements about weather are accurate? select all that apply

Answers

E, D, B

Wind direction is given in terms of where its going and it's never possible to be 100% accurate with weather predictions :)

The accurate statements about weather are:

a. wind direction is given in terms of the direction it blows from.

d. humidity measures the amount of water vapor in the atmosphere.

e. Weather can be described by air temperature, air pressure, wind velocity, and rainfall.

Let's examine each of the statements about weather:

a. Wind direction is given in terms of the direction the wind is blowing from: This statement is accurate. For example, a north wind blows from the north.

b. Weather is a description of the average temperature and precipitation range of a region over time: This statement is inaccurate. That description actually defines climate, not weather. Weather refers to the short-term atmospheric conditions in a specific place at a specific time.

c. With the right tools, weather can be predicted with 100% accuracy five days ahead of time: This statement is inaccurate. Weather prediction is complex and subject to many variables, hence it cannot be predicted with absolute certainty, especially long-term predictions.

d. Humidity is a measure of the amount of water molecules in the atmosphere: This statement is mostly accurate but could be more precisely stated as the amount of water vapor in the air.

e. Weather can be described in terms of characteristics such as air temperature, air pressure, wind velocity, and rainfall: This statement is accurate. These elements are fundamental components used to describe the weather at a given time and place.

Based on the above analysis, the accurate statements are:

a. Wind direction is given in terms of the direction the wind is blowing from.d. Humidity is a measure of the amount of water molecules in the atmosphere.e. Weather can be described in terms of characteristics such as air temperature, air pressure, wind velocity, and rainfall.

give an overview of 1-2 treatments for paralysis

Answers

>Physical therapy uses treatments such as heat, massage, and exercise to stimulate nerves and muscles.

>Occupational therapy concentrates on ways to perform activities of daily living.

>Mobility aids include manual and electric wheelchairs and scooters.

>Supportive devices include braces, canes, and walkers.

>Assistive technology such as voice-activated computers, lighting systems, and telephones.

>Adaptive equipment such as special eating utensils and controls for driving a car.

https://my.clevelandclinic.org/health/diseases/15345-paralysis/management-and-treatment

How do invasive species spread? Identify three methods. (Site 1)

Answers

Answer

Hi,

They are spread primarily by human activities.

Three methods that can spread invasive species is ; blowing by wind, splashed by rain and carried by animals.

Explanation

Invasive species are a kind of living organisms that are new to an ecosystem and can result into harm that is diverse .These species grow and reproduce at a quicker rate and spread rapidly with potential of causing more harm. In short distances, these organisms depend on natural dispersal ways to spread to other places. Example of an invasive species is Burmese pythons in the Everglades.

Hope this helps!

10 POINTS! science plz help me!

Answers

An increase in genetic variation

Why are marshes more productive than bogs? A. Marshes have stagnant water. B. Marshes get more sunlight. C. Marshes are larger in size. D. Marshes have more water flow.

Answers

Answer:

Option D, Marshes have more water flow.

Explanation:

Marshes have water flowing round the year and thus they have wetlands which are nutrient enriched while bogs have stagnant water and thus they have poor soil with low nutrients and high content of peat.  

Marshes being nutrient enriched support a wide variety of reeds, grasses and woody trees while bogs have only mosses, fungi and shurbs  as their fauna.

Hence, option D is correct

Answer:

They have more water flow

Explanation:

how do you ecologists measure the population density

Answers

Ecologists measure the population density by using the Quadrat method and the Mark and Recapture method.

Answer:

They use the method of marking and recapture.

Explanation:

The method of marking and recapture is the most common way that ecologists use to measure population density. To carry out this method, scientists must remove some members of the population and mark them in some way, so that they can be identified later. After correctly marking them, the members return to their original population, where they will mix with the other members of the population for a period of time determined by the ecologist. The important thing is that this time is enough for the marked members to mix with the rest of the population. While waiting for that time to pass, ecologists continue to capture and mark other members of the population until the recapture of the first marked members takes place. In this way, the size of the population will be estimated through the proportion of catches.

Using the location and depth of where a fossil is found to estimate age is called (4 points)

A radioactive dating

B the law of superposition

C Index fossils

D the geologic time

Answers

The answer is; B

The law states that in an undisturbed layer of crust, the top layers are younger than the deeper layers. This is because as sediments are deposited, such as in the oceans, newer sediments are usually deposited over the older sediments on the bed. This is a basic law of geochronology.

Answer:

The answer would be B - the law os superpositin

Explanation:

Law of superposition states that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence.

Hope this helped, good luck!

does anyone think their is life out their beyond our planet?

Answers

Of course yes my friend. We are not alone

But also exists the DRAKE EQUATION

The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way galaxy.

Look at Google about that equation and explode your curiosity =)

Best regards

Well of course we cant be the only living things in this whole galaxy and plus there are other galaxy's as well there's life bound to be there and dont forget about area 51 thats some freaky stuff like we know the government hides stuff were not that stupid we know that UFO's and aliens  exist i mean hello here we cant be the only things alive in this whole solar system and if you read up on stuff way before Christ and after you know the pyramids right no humans could have just done that :/ well thats my opinion anyways but seriously and the things they would carve in stone like the little pictures some of them be looking extra weird at times

explain how the release of additional eggs is prevented during pregnancy? ​

Answers

Progesterone and estrogens are thought responsible for the release (and prevention of release) of an egg during ovulation

During pregnancy, hormonal changes prevent the release of additional eggs by suppressing the secretion of FSH and LH, inhibiting ovulation and thus protecting the singleton pregnancy.

During pregnancy, the body releases hormones specifically designed to regulate the production of eggs. This hormonal regulation ensures that additional eggs are not released, as the body systems are already managing and preparing for the development and birth of the offspring. The release of an egg, known as ovulation, is inhibited primarily by the action of hormones on the hypothalamus and the pituitary gland. These hormones provide negative feedback on the hypothalamus and pituitary, leading to the suppression of follicle-stimulating hormone (FSH) and luteinizing hormone (LH), which are normally responsible for stimulating ovulation. The prevention of ovulation is critical because it ensures that no additional eggs are fertilized, maintaining the singleton pregnancy, or avoiding the possibility of superfetation (conception of a new embryo during an existing pregnancy).

As an overview, immature eggs are present in the ovaries from birth, and typically one egg matures and is released each month during a woman's reproductive years. However, this process is halted during pregnancy due to the hormonal changes mentioned above.

Which branch of earth science most likely involves the study of climate change and its effect on people?

A.) astronomy
B.) geology
C.) meteorology
D.) oceanography

Answers

Answer:

C. meteorology

Explanation:

meteorology is the scientific study of the atmosphere that focuses on weather processes forecasting, and climate.

Answer:

meteorology

Explanation:

Which activity occurs in the process of replication?

Answers

The process of DNA duplication is called DNA replication. Replication follows several steps that involve multiple proteins called replication enzymes and RNA. In eukaryotic cells, such as animal cells and plant cells, DNA replication occurs in the S phase of interphase during the cell cycle.

Final answer:

During DNA replication, DNA helicase unwinds the double helix so that DNA polymerase can add complementary nucleotides to each template strand, resulting in two new DNA molecules, each with one original and one new strand.

Explanation:

The process of replication is a crucial aspect of cell division, ensuring that each daughter cell receives an identical copy of DNA. During DNA replication, which occurs in the S phase of the cell cycle, an enzyme called DNA helicase breaks the hydrogen bonds between complementary bases in the DNA molecule. This unwinding of the double helix exposes the bases, allowing them to serve as templates for the formation of new DNA strands. Another enzyme, DNA polymerase, then adds complementary nucleotides to each single-stranded DNA template. This process is semi-conservative, meaning each of the new DNA molecules contains one original and one newly synthesized strand of DNA.

1.one variety of strawberry is resistant to a damaging fungus but produces small fruit. Another strawberry variety produces large fruit but is not resistant to the same fungus the two desirable qualities may be combined in a new variety of strawberry plant by) A. cloning B asexual reproduction C direct harvesting D selective breeding) 2. in the past humans developed varieties of dogs such as the German Shepherd and the bearded collie using) A selective breeding for particular traits B recombination of genes during mitosis C mutations present only in body cells D natural selection of favorable traits) 3. A common practice used by breeders to maintain a desired trait in dogs is A artificial selection B regeneration C vegetative propagation D sporulation ​

Answers

The answers are: D natural selection of favorable traits and C.mutations present only in body cells

Hope this helped!

The two desirable qualities may be combined in a new variety of strawberry plant by cloning. In the past humans developed varieties of dogs such as the German Shepherd and the bearded collie using selective breeding for particular traits, and A common practice used by breeders to maintain a desired trait in dogs is artificial selection. The correct option for question 1 is A, 2 is A, and question 3 is A.

What is artificial breeding?

Artificial selection, also renowned as selective breeding, and is basically the practice of sorting for desirable characteristics in agricultural products or even animals instead of allowing the species to change and evolve naturally, as in natural selection.

Darwin took into account two sorts of artificial selection in natural selection in The Variation of Animals and Plants Under Domestication namely methodical selection and unconscious selection.

Cloning allows the two quality attributes to be mixed in a fresh batch of strawberry plants.

In the previous era it is the humans developed dog breeds including the German Shepherd and the bearded collie by selective breeding for specific traits.

Artificial selection is a standard procedure used by breeders to establish a desired trait in dogs.

Thus, the correct option for question 1 is A, 2 is A, and question 3 is A.

For more details regarding artificial selection, visit:

https://brainly.com/question/12560443

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Which of the following is not an activity promoted through environmental activism? a. conservation b. corrective justice c. pollution prevention d. waste regulation Please select the best answer from the choices provided A B C D

Answers

Letter B, corrective justice

the adoption of corrective measures of justice is a prerogative of the state, that is, of the public power instituted and not of activists.

Answer: b. corrective justice

Explanation:  

Corrective justice is not an activity promoted through environmental activism.

Corrective justice refers to a theory of justice which has its roots in Aristotle. It centers on the connection between law and morality.  It involves the amendment or correction of an injustice inflicted by one person on another person. It makes available rectification of unjust committed by an individual that cause harm to another.

The original source of energy in most ecosystems is

Answers

i believe the answer is the sun

which of following is not a tool used in engineering and technology?

Answers

aye what’s the following tho

Answer:

I don't know the answer so I don't know it

Fossil evidence suggests that whales evolved from land mammals. Using comparative DNA techniques, scientists have also suggested that whales are related to hippos. How could comparing amino acid sequences support the theory of evolution?

Answers

B i hope it  help you

The amino acid sequencing sometimes reveals the ancestral evolution of the organisms.

What is meant by amino acid sequencing?

Adaptive evolution at the molecular level can be studied by detecting convergent and parallel evolution at the amino acid sequence level. For a set of homologous protein sequences, the ancestral amino acids at all interior nodes of the phylogenetic tree of the proteins can be statistically inferred.

Inconsistent results on the association between evolutionary rates and amino acid composition of proteins have been reported in eukaryotes. However, there are few studies of how amino acid composition can influence evolutionary rates in bacteria. Thus, we constructed linear regression models between composition frequencies of amino acids and evolutionary rates for bacteria.

Compositions of all amino acids can on average explain 21.5% of the variation in evolutionary rates among 273 investigated organisms.

Thus, the amino acid sequences support the evolutionary patterns .

For more information about amino acid,sequencing, visit:

https://brainly.com/question/24947838

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