Nirates and phosphates are important chemicals to living things. Explain why these chemicals can also be pollutants.
Answer:
Nitrogen and phosphorus are essential elements for all living organisms. They are used in DNA and chemical processes in the body. Most nitrogen is found in the air and most phosphorus is bound up in rocks and sediments, making them unavailable to organisms. And they are pollutants cuz nitrogen and phosphorus support the growth of algae and aquatic plants, which provide food and habitat for fish, shellfish, and smaller organisms that live in water. But when too much nitrogen and phosphorus enter the environment - usually from a wide range of human activities - the air and water can become polluted
Explanation:
if my answer help, I hope you get better <3
Explanation:
When nitrate and phosphate ions concentrations in shallow waterbodies are in excess, there is overgrowth of water plants leading to the formation of algal bloom. This causes a high consumption of dissolved oxygen in the water. ... The dead plants and animals decay creating deterioration of water quality.
In Kevin’s favorite comic book, the superhero has special powers. In one adventure, the superhero must stop an evil villain who threatens to destroy the city with a powerful energy blast.
As he confronts the villain, he makes the following claims:
1: “I can create an energy force field to save the city.”
2: “I can destroy the energy before it destroys the city.”
3: “I can convert all the energy before it can do any harm to the city.”
4: “I can absorb all the energy and make it go away.”
If the superhero must obey the law of conservation of energy, which of the above can he actually do?
a. 1
b. 2
c. 3
d. 4
Answer:
3
Explanation:
The law of conservation of energy states that energy cannot just be created, so answer one is out. Energy also cannot be simply destroyed, so answer to is out as well. From here it gets tricky, since both answers make some sense under these rules. However, absorbed is bassically the same as destroying it leaving only answer three. Answer three does obey these laws, as energy can be converted.
It has been theorized that all of the modern continents on Earth were once part of a single continent. What scientific evidence is used to support this theory?
1) Fossils of similar lifeforms have been found on different continents.
2) The coastlines of some modern continents appear to have once fit together.
3) Some of the continents that exist today have similar types of rocks.
Which on is it?
Answer:
2) The coastlines of some modern continents appear to have once fit together.
Explanation:
Because it is true if you look at a map you can clearly see that some continents fit together perfectly. It is quite amazing.
Answer:
All 3 are true.
Explanation:
Study Island
I have asked this already!!!!!
Answer:
01) Cu tting hair is a physical change. reason-1
02) Cooking can be either one, but I would choose chemical reason-3
03) Ice cream melting is a physical change reason-2
Explanation:
in a neap tide, the moon's effect on blank
Answer:
Neap tides occur during the first and third quarter moon, when the moon appears "half full"
What type of microscope has to be used for
Nucleus of a plant cell
Surface of a dust particle
Feeding behavior of a microorganism
Structure of a single white blood cell
Answer:
Nucleus of a plant cell = light microscopes
surface of a dust particle = scanning electron microscope.
Feeding behavior of a microorganism = electron microscopy.
Structure of a single white blood cell = typical optical microscope
Jolene wants to experiment with sugar cubes. Which of the following causes a sugar cube to only change physically, not chemically?
a) burning the sugar cube with a match stick.
b) crushing the sugar cube and dissolving it in water.
c) dehydrating the sugar cube with sulfuric acid.
d) chewing the sugar cube and digesting it.
Answer:2) crushing the sugar cube and dissolving it in water is the only physical change here.
Explanation: All the other shows chemical change.
can someone answer these chemistry questionss
you are able to search it up and this looks more like math then chemistry
The graph below shows the mechanical energy of a car on a roller coaster at four different locations.
Which of the following is a supported by evidence from the graph?
Potential energy increases but kinetic energy stays the same during a roller coaster ride.
Kinetic energy and potential energy change, but energy is neither created nor destroyed during a roller coaster ride.
Potential energy is destroyed during a roller coaster ride.
Kinetic energy is created during a roller coaster ride.
A)Potential energy increases but kinetic energy stays the same during a roller coaster ride.
Explanation:
Potential energy is stored energy that depends upon the relative position of various parts of a system.
Kinetic energy is a form of energy that an object or a particle has by reason of its motion
it goes back and fourth
Which of the following are true when milk changes into curd?
(i) Its state is changed from liquid to semi-solid.
(ii) It changes colour.
(iii) It changes taste.
(iv) The change cannot be reversed.
Choose the correct option.
a) (i) and (ii)
b) (ii) and (iii)
c) (i), (iii) and (iv)
d) (i) to (iv)
Answer: If you still need it, i can answer.
the answer is C.
Milk doesn't really change color.
hope this helps. have a nice day.
The temperature of a plastic cup is 70ºF. It is filled with water that is 40ºF. Which of the following describes how thermal energy is transferred?
a. Thermal energy is transferred from the cup to the water until they are both at 45ºF.
b. Thermal energy is transferred from the cup to the water until the cup is at 60ºF and the water is at 50ºF.
c. Thermal energy is transferred from the water to the cup until they are both at 45ºF.
d. No thermal energy is transferred between the cup and the water, so the cup will stay at 70ºF and the water will stay at 40ºF.
How do telescopes help astronomers learn more about the universe?
a. Telescopes gather more light than the n a k e d eye can see.
b. Telescopes gather less light than the n a k e d eye can see.
c. Telescopes change the color of the light that we see.
d. Telescopes apply a filter to the light that we see.
Answer:
A. Telescopes gather more light than the n a k e d eye can see
Explanation:
Telescopes allow us to see things from far away by gathering more light
Order the colors of the visible light spectrum from longest wavelength to shortest wavelength.
green
yellow
orange
red
violet
indigo
blue
Answer:
red, orange, yellow, green, blue, indigo and violet.
Select each correct answer. More than one answer may be correct.
Which of the following contributes to the phases of the Moon as seen from Earth?
the Sun lighting different parts of the Moon at different times
the Moon orbiting the Earth
varying amounts of the Moon's lit surface being visible from Earth
Answer:
The Sun lighting different parts of the Moon at different times
Explanation:
I think
Answer:
all of them are right ok guys
Explanation:
trust me I did this on study island
Compare and contrast the Andes Mountains and the Rocky Mountains. How are they formed? What consumers and producers are in each? First reasonable answer gets brainly
I have no idea what this is about, I keep reading it over and other again, but I still don't understand! Help?
Answer:
A
Explanation:
So, here's a slightly simpler example:
If i had a jar, and i added sand, then rocks on top of the sand, and finally dirt on top of everything, what would the layers of the jar look like? (Assuming that i hadn't shaken the jar)
Well, the answer would be: The bottom of the jar would be a sand, the middle would be rocks, and on top would be dirt.
This question is pretty much the same question, just with fancier words and 4 things instead of 3
If the stars come first, then you find them at the very bottom of the jar. if the squares come second, then they are above the stars, but below the triangles, which come third. The circles come last, so you find them last. Thus the order is: stars, squares, triangles, and circles, from bottom to top, so it's A
Note: the jar represents the earth, and it too, may be shaken up in some places. This means that sometimes, if two organisms lived very close together in time (like the star and the square), and some event happened, you may occasionally see the square below the star. However, this question says that they weren't disturbed.
Why have ice ages come and gone?
Answer:
"When less sunlight reaches the northern latitudes, temperatures drop and more water freezes into ice, starting an ice age. When more sunlight reaches the northern latitudes, temperatures rise, ice sheets melt, and the ice age ends."
Explanation:
Answer:
As temperatures decrease, less sunlight reaches the water. This causes the ice to freeze, when this happens in mass it causes an ice age. Later, temperatures rise and the ice melts.
Explanation:
Temperatures plummet as less sunlight reaches northern latitudes, and more water freezes into ice, triggering an ice age. Temperatures rise, ice sheets melt, and the ice age ends as more sunshine reaches northern latitudes.
When telescopes are looking at objects that are really far away, they are actually looking back in time.
True
False
Answer:
true
Explanation:
looking i the sky you can see stars that are billion years old
Time can be traversed via a telescope. Looking out into space is like looking back in time, according to NASA experts. Light needs time to traverse vast distances of space and come to Earth. Here the given statement is true.
The "deep" in Hubble Deep Field denotes the telescope's capacity to see some of these far-off, faint objects. It's like observing faraway space objects by going back in time. Even though light travels at an astounding rate, it still needs some time to cross the vastness of space.
Light travels slowly, so we don't see things as they are now, but as they were when they released the light that reached us from all over the galaxy.
Thus the given statement is true.
To know more about telescopes, visit;
https://brainly.com/question/30246219
#SPJ4
A student made the table below to compare high air pressure and low air pressure. Which correction is required to make the table correct?
a table comparing air pressure. High pressure has more air above pressing down and results in stormy weather. Low pressure has less air above pressing down and results in cloudy weather.
High pressure results in clear skies.
High pressure results in less air below pressing up.
Low pressure results in more air above pressing down.
Low pressure results in sunny weather.
Answer:
high pressure results in clear skies
Explanation:
HELP ASAP BRAINLIEST INCLUDE
Answer:
[D] Changes occur in organisms over long period of time
[RevyBreeze]
OK I NEED HELP ON THESE BUT CAN U PLEASE LIKE EXPLAIN Y
Answer:
For the 1st question, it is the pickup truck.
Explanation:
Even though they are the same speed, the pickup truck is curving. So, I think it changes velocity.
Answer:
For the 2nd question, it is B.
Explanation:
Accelaration is either slowing down, speeding up, or changing direction. However, B is in a straight line. So, it must be B.
A student performs an exothermic reaction in a beaker and measures the temperature. If the thermometer initially reads 35 degrees Celsius, what is a possible reading of the thermometer after the reaction? A. 35 degrees Celsius B. 0 degrees Celsius C. 45 degrees Celsius D. 25 degrees Celsius
Answer:
C
Explanation:
Exothermic means that heat is released from the reaction
An index fossil represents a species that lived during
A.
a long interval of Earth's history.
B.
Earth's entire history.
C.
a short interval of Earth's history.
D.
several intervals of Earth's history.
which one is it?
Answer:
C
Explanation:
an index fossil is a fossil from a very short-lived, geographically widespread species known to exist during a specific interval of geological time.
plssssssssssssssssssssssssssssssheklppppppp
If a scientist knows the relative age of a fossil, he can also know
A.
the type of climate from which it came.
B.
the relative age of the rock where it was found.
C.
how it became extinct.
D.
how long the organism was alive.
What type of cells make up all parts of the human body?
Select one:
Prokaryotic cells
Eukaryotic cells
Archaea cells
Circular cells
Answer:
Eukaryotic Cells
Explanation:
Eukaryotic cells have organelles, membrane-bound structures that perform different functions in the cell, and prokaryotic cells do not. Some typical eukaryotic organelles include the nucleus, mitochondria, ribosomes, Golgi apparatus, and chloroplasts.
I need help with this one
Answer:
Claim 1 is the correct answer.
11 The diagram below shows two important parts of the human digestive system.
Answer:
A c B
Explanation:
i would love to do ya homework
The diagrams show two different ways that water, methane, and acetic acid can be modeled. Look closely at each type of model. Explain what each type of model shows best.
HELP ME PLZ!
T^T
Answer:
they all show the chemical makeup
Explanation:
Why are astronomers sending telescopes, like the Hubble Space Telescope, into space?
a. It puts the telescope closer to the sun.
b. It allows for the telescope to stay colder.
c. It's cheaper and more efficient to store the telescopes in space.
d. It lessens the effect of the atmosphere.
Answer:
C.)atmosphere distorts and blocks the light.
Explanation: