Hey! Could someone help? *spam answers not tolerated*
Don't answer if you don't know, and thanks a ton if you do! Have a good day!
What does the salinity of sea water represent?
the volume of salt in the ocean
the mass of salt in the ocean
the concentration of salt dissolved in the ocean
the concentration of all dissolved chemicals in the ocean
Answer:the concentration of salt dissolved in the ocean
Explanation:
Your welcome
Answer:
the concentration of salt dissolved in the ocean
Explanation:
Option c is correct
HLP PLZ. explain why you need to use more than one property to identify a mineral.
Answer:
Because two minerals can share property's so you need more then one to tell them apart. Hope this helped! :)
Explanation:
When a volcano erupts, particles of rock and ash are released into the atmosphere. After this, water droplets form around the rock and ash particles and fall to Earth as rain. The rainwater helps plants grow.
In this scenario, which spheres of Earth interact?
biosphere, cryosphere, hemisphere
cryosphere, geosphere, biosphere
geosphere, hydrosphere, biosphere
hydrosphere, cryosphere, geosphere
Following the scenario, the spheres of the earth that interacts would be the geosphere, the hydrosphere, and the biosphere.
Interaction among the spheres of the earthVolcanic eruption emanates from the geosphere.
The formation of water droplets and rain as a result of the volcanic eruption involves the hydrosphere.
The induction of plant growth by rainwater involves an interaction between the hydrosphere and the biosphere. The plant represents life.
More on the different spheres of the earth can be found here: https://brainly.com/question/24215268
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Answer:
c
Explanation:
I WILL GIVE BRAINLIEST TO WHOEVER ANSWERS CORRECTLY FIRST . The image below depicts Earth's ozone levels from 2016. The darker portion indicates the lowest level of ozone.
Which of the following statements is true?
A. Thinning ozone levels in the atmosphere only affect the North Pole.
B. Thinning ozone levels in the atmosphere contribute to changes in bird migration patterns.
C. Thinning ozone levels in the atmosphere always accelerate the rate of photosynthesis in plant life.
D. Thinning ozone levels in the atmosphere may lead to increased exposure to ultraviolet radiation at the Earth's surface.
Answer:A
Explanation:
Ozone acts as a protective sheet above the earth's atmosphere which trap the hazard UV rays from sun. Therefore, the a depletion in the ozone layer causes increased exposure to UV radiation. Thus option D is correct.
What is ozone?Ozone is O₃, formed by the reaction of nascent oxygen with the atmospheric dioxygen. Chemically it is a toxic gas and highly reactive. An umbrella like layer of ozone gas is present in the stratosphere of the atmosphere.
This ozone layer protect us from ultraviolet radiation from sun. The UV rays are extremely dangerous which causes skin burn, head ache, respiratory and reproductive problems and even cancer.
Ozone is capable of trapping these uv rays without reaching to earth surface. Hence, a depletion in ozone layer increase the exposure to UV-rays.
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HELPPPPPPPPPP DUE TODAY
The flow of matter through the carbon and nitrogen cycle can be disrupted! The video clip explained an example in both the carbon and nitrogen cycle. Pick one of these and describe how this disruption could impact cycling.
Answer:
Where is the video
Explanation:
Need to see it to answer the question
red aesthetic and one other thing
Nitrogen gas is more abundant in our atmosphere than oxygen! However, nitrogen needs to be converted into different forms to be used by many organisms. Bacteria are highly involved in this! Describe the role of (A) bacteria fixing nitrogen as they live symbiotically with some plant species, (B) nitrifying bacteria, and (C) denitrifying bacteria in the nitrogen cycle.
Explanation:
(A)role of nittogen fixing bacteria
=Nitrogen-fixing bacteria, microorganisms capable of transforming atmospheric nitrogen into fixed nitrogen (inorganic compounds usable by plants). More than 90 percent of all nitrogen fixation is effected by these organisms, which thus play an important role in the nitrogen cycle.
B)role of nitrifying bacteria
=Nitrifying bacteria convert the most reduced form of soil nitrogen, ammonia, into its most oxidized form, nitrate. In itself, this is important for soil ecosystem function, in controlling losses of soil nitrogen through leaching and denitrification of nitrate.
C)role of denitrifying bacteria
=Denitrifying bacteria converts nitrates back to nitrogen gas.
The symbol Ag stands for which element?
Answer:
Silver
Explanation:
Give me a brainliest please
Answer:
Ag stands for silver which is derived from Latin word Argentums
The area that includes everything between the cell membrane and the nucleus of a cell is called the ___________.
A.mitochondria
B.chloroplast
C.cytoplasm
D.vacuole
The answer is C. Cytoplasm
happy to help!!
a scientific belief that was accepted centuries ago, but has since been disproved. How does it support the use of the term "scientific theory" instead of "scientific fact?"
Answer:
In the past was believed that species were fixed entities
Explanation:
Before Darwin's evolutionary theory (in which all living things arise through descendants with modification), Linnaeus had proposed that species were immutable entities. Although it was an erroneous concept, this belief enabled the development of a system for classifying and naming organisms. Indeed, Linnaeus is nowadays recognized as the father of taxonomy to create this system. This example shows that scientific knowledge is not based on factual information, but it is a process that progressively increases our understanding of the real world.
Which function do the stomata perform in photosynthesis?(1 point)
Answer:
They are pores surrounded by specialized parenchymatic cells, called guard cells. Stomata have two main functions, namely they allow for gas exchange acting as an entryway for carbon dioxide (CO2) and releasing the Oxygen (O2) that we breath. The other main function is regulating water movement through transpiration.
The stomata performs the function of absorbing and releasing gases in the process of photosynthesis.
What is photosynthesis?It is defined as a process by which plants and other photosynthetic organisms convert the light energy in to chemical energy through the process of cellular respiration.
Some of the energy which is converted is stored in molecules of carbohydrates like sugar and starches which are made up of from carbon dioxide and water . Photosynthetic organisms which can perform photosynthesis are algae and cyanobacteria. Photosynthesis is largely responsible for producing and maintaining the content of oxygen in earth's atmosphere.
The process begins with proteins absorbing light energy which are called reaction centers and contain a green pigment which is called chlorophyll . In plants ,these pigments are present inside organelles called chloroplasts while in bacteria they are present in plasma membrane.
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What is 4fe + 3o2 → 2fe2o3 balanced?
Which organs are part of the musculoskeletal system? Select three choices.
a. bones
b. hair
c. muscles
d. skin
d. tendons
e. nails
Answer:
bones, muscles, tendons
please help with this answer
Answer:
The answer is wave B, wave A
Explanation:
The closer the waves the higher the pitch. The higher the waves the louder it is.
Answer:
D: wave B, wave B
Explanation:
As a frequency of a wave increases, the sound and the pitch also increases as well. Therefore, it causes the wave to be loud and dangerous.
Hope it helped!
When a person looks at a bright light, tiny muscles in the eye contract so less light can enter the eye.
Which are most likely the characteristics of this muscle? Select three options.
nonstriated
involuntary
voluntary
striated
attached to skull
attached to the eyeball
Answer:
involuntary, attached to the eyeball, nonstriated.
Explanation:
Brian and his classmates conducted an experiment on what objects are attracted to an electrically charged balloon. Their teacher instructed them to write down their procedure. What is the purpose of writing down the procedure?
(A) The experiment can be changed by others to investigate a new question.
(B) The exact experiment can be repeated by others, and the results can be compared.
(C) The procedures for the experiment can be changed for another experiment.
(D) The procedures for the experiment can be tested for accuracy.
Answer:
b
Explanation:
other people can do the exact same experiment and compare it to others
Question 11 (2 points)
A student thinks that scientific theories are not reliable sources of information, since scientists tend to argue about the details of them. What is the flaw in the student's reasoning? (2 points)
a
The arguments between scientists tend to make theories stronger, not weaker.
b
Scientists rarely disagree about scientific theories.
c
Scientific theories do not change over time, which makes them reliable.
d
It is rare for a scientific theory to be valid for more than a few years.
Question 12 (2 points)
Which describes the current model of the atom? (2 points)
a
It can be used to predict atomic behavior in most circumstances.
b
It has been perfected and will never be changed in the future.
c
It is only accepted by a small fraction of scientists.
d
It is only useful in very specific circumstances.
Question 13 (2 points)
Which subatomic particles have an electrical charge? (2 points)
a
Electron and proton
b
Neutron and proton
c
Only electron
d
Only proton
Question 14 (2 points)
A student thinks that the more protons an atom has, the more reactive it will be. Which will best disprove this student's idea? (2 points)
a
Compare the reactivities of lithium (Li) and krypton (Kr).
b
Note that rubidium has 48 neutrons.
c
Compare the number of protons in cesium (Ce) and xenon (Xe).
d
Count the number of neutrons in an atom of helium.
Question 15 (2 points)
Which element has a larger atomic number than silver (Ag)? (2 points)
a
Pd
b
Cu
c
Ni
d
Hg
Question 16 (2 points)
How do scientists use creativity in their careers? (2 points)
a
Devising a hypotheses involves creating new explanations for phenomena.
b
The most important part of an experiment is how colorfully the data is displayed.
c
Scientific results must be explained in a creative, exciting way.
d
Scientists judge each others' work based mostly on how creative it is.
Question 17 (2 points)
What does the position of magnesium (Mg) on the periodic table tell you about how it reacts with other elements? (2 points)
a
It is in the second column, so it tends to gain two electrons.
b
It is in the second column, so it tends to lose two electrons.
c
It is in the third row, so it tends to lose three electrons.
d
It is in the third row, so it tends to gain three electrons.
Question 18 (2 points)
Which best describes how magnesium (Mg) and oxygen (O) bond? (2 points)
a
They form an ionic bond by exchanging two electrons.
b
They form an ionic bond by exchanging three electrons.
c
They form a covalent bond by sharing one electron.
d
They form a covalent bond by sharing four electrons.
Question 19 (2 points)
Which question could be answered using DNA as a molecular clock? (2 points)
a
How old is a dinosaur bone?
b
How long ago was a dinosaur track left in the mud?
c
How long ago did two species of birds share an ancestor?
d
How old was a bird when it died?
Question 20 (2 points)
Calcium chlorate has the formula Ca(ClO3)2. Which best describes the structure of calcium chlorate? (2 points)
a
One molecule of calcium chlorate contains nine atoms.
b
Calcium chlorate is an element that contains three atoms.
c
It takes nine different elements to make one molecule of calcium chlorate.
d
Calcium chlorate contains two Ca groups.
Answer:
132
Explanation:
Because it just makes sense
Answer:
132
Explanation:
imagine you are volunteering in a 1 st grade classroom. The students recently learned about the water cycle. One student raises her hand and asks, “I heard that elements like carbon can cycle too. How does carbon cycle? Is it like how water cycles?” How would you explain the cycling of carbon to this 1 st grade class? Keep in mind that the students have likely not taken an advanced science course yet!
Answer:
In carbon cycle, carbondioxide gas is present in the atmosphere. This carbondioxide gas is taken inside by the plant body through stomata and made food from it. When this food is eaten by animals, this carbon is transferred to their bodies. During breathing, carbondioxide gas is removed from animal body and the carbondioxide gas again goes to the atmosphere.
Explanation:
Answer:
The carbon cycle is similar to the water cycle!
Explanation:
The water cycle shows us that water on Earth isn't destroyed or created, it simply moves around in different forms. Carbon is like that too, but except becoming droplets and clouds it passes through stages where it can exist in the ground as things like coal and be burnt where it will then move into the atmosphere as a gas, until eventually that gas is used to grow a plant. Eventually, that plant will be eaten by an animal, and when that animal dies it goes into the ground once again. Hence, the carbon is always there, just going throughout the planet in different forms.
Which two elements weather rocks by smoothing them? look below to ansawer
Temperature and plants
Water and plants
Water and wind
Wind and ice
Osmosis is the process in which _______ diffuses across a cell membrane.
A.glucose
B.energy
C.water
D.oxygen
Answer:
C.
Explanation:
Water
Select all that apply.
Select the major problems associated with the production of nuclear energy.
1. harm to animal and plant life
2. air pollution
3. potential reactor accidents
4. hazardous solid wastes
5. depletion of natural resources
Answer:
air pollution and potential reactor accidents
Explanation:
i pretty sure on those two
HELP ME QUICKLY ITS OVER DUE PLSSSSS
Explain why you think it is important to have a system that is able to distribute clean, safe water to different locations.
Answer:
it is important because different places have different amount of water ratio exist ,somewhere large amount of clean,safe water available but somewhere scarcity of it , it important to have this system it will help people living in area where lack of pure water general ly seen
Help! Its the last thing i needa do!
can someone please answer this question
Answer: 4
Explanation: Count the blue ones and there are 4. hope this helps :)
Compare and contrast the conditions required for snow and rain to form.
Answer:
Snow is formed when cold air freezes while rain is formed when water vapor is condensed
Explanation:
Susan has just moved into a new house. For some reason, she cannot get the grass to grow in her yard. She decides to grow small amounts of grass inside her house as part of an experiment. The first group of grass is exposed to a light intensity of 400. The second group is exposed to a light intensity of 1200.
Using the graph, which of the following should be expected from Susan’s two groups of plants?
Group of answer choices
The plants at a light intensity of 1200 will produce more oxygen than the plants at 400.
The plants at a light intensity of 1200 will perform only stage 1 of photosynthesis.
The plants at a light intensity of 400 will produce more glucose than the plants at 1200.
The plants at a light intensity of 400 will grow more quickly than the plants at 1200.
Answer:
Can you show us a picture of the graph, I may be able to help then. Thanks!
Explanation:
You should use a calculator to help you with this assignment. Question 2 options: True False
Answer: true
Explanation:
Explain oxidation using rust as an example
Answer:
Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust.
Explanation:
Hope this is what u were looking for
Answer:
Rust forms when air reacts with somehting, this is also called oxidation
Explanation:
How does the attraction between the particles of a liquid relate to the
temperature at which the liquid changes state?
A. Weak attractions mean the liquid boils at a higher temperature.
B. Strong attractions mean the liquid freezes at a lower temperature.
C. Weak attractions mean the liquid freezes at a lower temperature.
D. Strong attractions mean the liquid boils at a lower temperature.
Answer:
C
Explanation:
C
The attraction between particles of liquid relating to the temperature at which liquid changes state are weak attractions meaning the liquid freezes at a lower temperature.
What is the relation between temperature and force of attraction?As the temperature increases of a liquid, the kinetic energy of the molecules increases to an extent where it can overcome the inter-molecular forces of attraction and as a result of which viscosity of liquid decreases and it can flow more easily.
When liquid changes state to solid at lower temperatures the forces of attraction are weakened to an extent to which state of matter changes from liquid to solid.During the process of transition from liquid to solid as temperature is lowered there is a decrease in viscosity of liquid .
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