Chemistry Middle School

I NEED HELP WITH BOTH QUESTIONS PLZZ!!!!!!!!

I NEED HELP WITH BOTH QUESTIONS PLZZ!!!!!!!!

Answers

Answer 1

Answer:

Volcanoes erupting

Sea levels rising, glaciers melting

Explanation:

Ion kno bout the second one but I kno the first one is right

Answer 2
2 ,3,and 4 for the second I’m believe

Related Questions

Help its for science ill give brainilest.

Answers

directly proportional

Answer:

This equation reveals that the kinetic energy of an object is directly proportional to the square of its speed. That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four.

Explanation:

A cube has a mass of 25g and a volume of 5cm3, what is its density?

Answers

The answer is 0.2 because you have to divide the mass by volume to get density, that is the formula.
Density = mass / volume

Density = 25 / 5

Density = 5 g/cm3

How do organisms form carbon films?

Organisms turn into rock.
Residue is left on rocks when organisms decay.
Hollow forms are left in sediment by decaying organisms.
Organisms leave evidence of their activities, such as footprints.

Answers

Answer:

hollows forms are left in sediment by decaying organisms

Answer:

The answer is C. I just did the quiz and got 90%, but this is not the one I got wrong. Hope this helps!

Explanation:

How does this evidence help explain why the skin cancer rate is higher in Australia than in Brazil, even though the two countries get the same amount of sunlight?

Answers

Answer:

The Ozone layer

Explanation:

Ozone in the atmosphere can absorb ultraviolet light, which stops the light from reaching Earth’s surface, so people absorb less of it. Australia has less ozone than other places, like Brazil, and this is why Australia gets more ultraviolet light.

Is this a scientific model? Use complete sentences to explain why or why not



Public Domain

Answers

Answer:

it is

Explanation:

HELP plz
Are beaches made from erosion or deposition?

Answers

Answer:

Desposition

Explanation:

Answer:

Deposition

Explanation:

Beaches are wave-deposited accumulations of sediment.

In an exothermic reaction, chemical energy is converted to _____.

1.thermal
2. mechanical

Answers

Thermal
Because exothermic is having to do with energy

The chemical reactions are generally of many types. The exothermic and endothermic reactions are important among them. In an exothermic reaction the chemical energy is converted to thermal energy. The correct option is 1.

What is exothermic reaction?

The chemical reactions which proceed with the evolution of heat energy are defined as the exothermic reactions. The chemical reactions which proceed with the absorption of heat energy are called endothermic reactions.

In an exothermic reaction, system loses heat to surroundings. Since heat is given out in exothermic reactions, the enthalpy of the products will be less than that of the reactants.

In exothermic reaction, q will be negative and the enthalpy change will be also negative. In this reaction  chemical bonds are broken and new bonds are formed. The chemical energy is converted to kinetic energy which is released as heat.

Thus exothermic reaction releases thermal energy.

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A characteristic property is one that remains the same regardless of the amount of matter that is present.

Which of the following is a characteristic property of matter?

Group of answer choices

Density

Mass

Volume

Weight

Answers

the answer is weight
The answer is weight

What are examples of pollution that can be caused by agriculture?

Answers

Answer:

Nitrate from agriculture is now the most common chemical contaminant in the world’s groundwater aquifers. Aquatic ecosystems are affected by agricultural pollution; for example, eutrophication caused by the accumulation of nutrients in lakes and coastal waters impacts biodiversity and fisheries.

Answer: Agricultural Pollution is a waste or discharge resulting from farming that degrades or contaminates the surrounding environment. This pollutions comes from several sources and has adverse effects on many different types of organisms. The impact of this pollution can be reduced through certain practices. Causes are:

Explanation:

Pesticides and Fertilizers. To begin with, the earliest source of pollution has been pesticides and fertilizers. ...

Contaminated Water. ...

Soil Erosion and Sedimentation. ...

Livestock. ...

Pests and Weeds. ...

Heavy Metals. ...

Soil Erosion and Sedimentation. ...

Organic Contaminants.

what am i supposed to write here?

Answers

Answer:

I think u are supposted to find out the are the missing things

Explanation:

Your suppost to find the missing Protons nuetrons and atomic mass in the blanks and the bottom write a sentence about how his gold foil expirement works/ect.

a
a decrease in the number of zebra mussels along the waterways
b
an increase in the number of zebra mussels along the waterways
c
no effect because more time is needed to determine an outcome
d
no change in the number of zebra mussels infecting the waterways

Answers

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yes t o m m y i n n i t

label the following as a pure substance or a mixture.

Answers

Answer:

b

Explanation:

can you help ,meeeeee

Answer: a mixture

Explanation:

What patterns in the rock layer fossils helped you identify an extinction?

Answers

Often, the rock layers bookending the mass extinction are noticeably different in their compositions. These changes in the rocks show the effects of environmental disturbances that triggered the mass extinction and sometimes hint at the catastrophic cause of the extinction
What the person said bro

The invention of the _____________ was considered the critical invention for easily classifying and organizing Stars by brightness, color, and temperature


Radio Telescope


HR Chart (Hertzsprung- Russell)


Infra red Camera

Nasa Star Modeling Programs

Answers

Answer:

radio telescope

Explanation:

We use radio telescopes to study naturally occurring radio light from stars, galaxies, black holes, and other astronomical objects. We can also use them to transmit and reflect radio light off of planetary bodies in our solar system.

not a telescope, thats how you see stars. the answer is the HR Chart. If you look at this chart, it has all of the types of stars organized by brightness, color, and temp like the question asks.

How does melanin provide protection against skin cancer? use absorb
energy
light in your sentece

Answers

Energy for the light can cause skin cancer and damage genetic materials (melanocytes) however melanin absorbs the light meaning the genetic material in their skin cells are protected from any damage so in conclusion the more melanin in the cells the more their cells are protected

The melanin provides protection against skin cancer by absorbing harmful UV light from the electromagnetic spectrum.

What is electromagnetic spectrum?

The electromagnetic spectrum consists of radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.

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pls help really easy just search the questions f u need to

Answers

Answer:i cant seee

Explanation:

none

1. because it’s features are very very like the planet mars so is useful for research on the planet. 2. it protects scientists from the extreme temperatures. 3.i’m not sure but i guess they would research how suitable mars is for humans to live on?

Which of the following statements is true?

Protons and electrons are found in the nucleus.
Atomic weight and atomic mass are the same.
Isotopes have different numbers of electrons.
Weight depends on the amount of gravity.

Answers

Answer: Atoms that have the same number of peg holes may have similar chemical Although a proton has more mass than an electron, they both have the same amount of stability of the nucleus, and hence the atom's radioactivity,

Explanation:

Answer:

weight depends on the amount of gravity

Explanation:

an objects weight depends on it's mass and the strength of the gravitational pull.

Which set of diagrams shows a balanced chemical equation?
A: 2 H, 2 O, 2 S and 2 H, 2 O, 3 S. B: 4 H, 2 O, 3 S and 4 H, 2 O, and 1 S. C: 4 H, 2 O, 2 S and 4 H, 2 O, 2 S. D: 2 H, 2 O, 2 S and 1 H, 1 O, 1 S.
A. Diagram A
B. Diagram B
C. Diagram C
D. Diagram D

Answers

Diagram C shows a balanced chemical equation because it has equal number of atoms on both sides of the equation.
The answer is diagram C

Hope this helped

Please help will give brainliest
Which of the following statements is TRUE regarding air resistance?

A fast-moving object experiences more air resistance than a slow-moving object

A slow-moving object experiences more air resistance than a fast-moving object

Answers

A slow moving object experiences more air resistance then a fast moving object
a slow moving object experiences more air resistance than a fast moving object , it’s the second one

i will give u 50 points if u help me

Answers

14) gas to liquid to solid
15)chlorine displaces bromine from potassium bromide
16) non-metals
6)vertical
7)similar properties
8)there are patterns
10)decrease
11)very reactive
12) hydrogen
18)lower density than air
19)better insulator
20)metalloids

Answer:

a b a

Explanation:

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Thomas thinks that acceleration means “speeding up.” Explain why this is incorrect.

Answers

Answer:

Explanation:

Thomas is incorrect because acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.

Answer: Thomas is wrong because acceleration is the name we give to any process where the velocity changes. Since velocity is a speed and direction, there are only two ways for you to accelerate: change your speed or change your direction or both.

If u help me with this i will crown u brainlest and give u 50 points

Answers

Answer:

b d a

Explanation:

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6 -b
7-b
8- b
9-b
10-a
11-b

Match the following items with the correct descriptions.

1. releases hydrogen ions
base
2. accepts hydrogen ions
eight
3. poor conductor of electricity
metal
4. shiny and lustrous
nonmetal
5. maximum number of electrons in first shell
acid
6. maximum number of electrons in second shell
two

Answers

Answer:

1.releases hydrogen ion acid

2.accepts hydrogen ion base

3. poor conductor of electricity non metal

4. shiny and lustrous metal

5. maximum number of electrons in first shell

two

6. maximum number of electrons in second shell

eight

what is found in the molecule dna?

Answers

Answer:

DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code.

Explanation:

i hop dis helps you

how the remains of plants and animals become fossil fuels. why are they considered nonrenewable resources

Answers

Answer:

It takes a very long time for things to become fossil fuel. Hence why it’s called non-renewable

Explanation:

I KEEP ASKING FOR HELP IVE DONE MOST OF THE QUESTIONS MYSELF BUT NEED HELP IN SOME IF YOU ANSWER I WILL GIVE BRAINLIEST
What happens to the motion of an object if forces acting on the object are equal and balanced?

A. The object begins to move

B. The object begins to slow down

C. The motion of the object does not change

Answers

Answer:

When the forces acting on an object have equal strength and act in opposite directions, they are balanced. These forces cancel out one another, and the motion of the object they are acting on remains unchanged. The object may change its speed (speed up or slow down), or it may change its direction.

So I think its C

You see this is because if the forces were different the object would either speed up or slow down but in this case the forces are equal so the motion of the object does not change.

Hope This Helps :)

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Answers

it looks like you have to watch the videos linked (i think you need to click on the names of animals). for each video, right down the traits and functions of the animal.
Unfortunately it won’t let me but the answers because it really has to say incorrect answer like-

Stephen pours a glass of ice water. He gets a phone call before he can drink it. What will happen if he leaves the glass on the counter for 2 hours?

a heat will transfer from the water to the ice until both reach the same temperature
b heat will transfer from the water to the ice until the water is colder than the ice
c heat will transfer from the ice to the water and the ice will stay colder than the
water.
d heat will transfer from the ice to the water and the ice will get warmer than water

Answers

Answer:

d im pretty sure

Explanation:

Which of the following would not be restricted (limited) by low levels of ATP?

Answers

You did not provide the possible answers.

Can yall please help me with this

Answers

Answer:

option D

Explanation:

option D is the correct answer.

mechanical energy = kinetic energy + potential energy

mechanical energy = 40+ 60 = 100 joules .

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I think it is D you can mark the person above me brainlest
Other Questions
Which equation would best help solve the following problem? The height of a triangle is 5 m less than its base. The area of the triangle is 42 m What is the length of the base? The annexation of Hawaii in 1898 contributed toA.the spread of democracy to Latin America.B.improved trade between the United States and Europe.C.the expansion of US power in the Pacific.D.heightened public fear of the influence of communism. 3. Which of the following best describes the main idea of this audio story? For the first time in history, two sets of adorable baby elephant twins were born in Kenyas Amboseli National Park. Elephants can be very hard to find, but visitors who spend enough time can spot large herds with many new babies. Just like humans do, elephants invest a lot of time and energy in nurturing and raising their young. The right environmental conditions have triggered an unusual elephant baby boom in Kenyas Amboseli National Park. Will give brainliest #14 Simplify the expression below.12x+8+7x+-4help plz Which image displays a healthy choice for lunch, based on current guidelines? pls help ASAP will give brainliest Excerpt from Stuff Matters By Mark Miodownik In the absence of copper, gold, and meteoric iron, our ancestors tools during the Stone Age were made of flint, wood, and bone. Anyone who has ever tried to make anything with these kinds of tools knows how limiting they are: if you hit a piece of wood it either splinters, cracks, or snaps. The same is true of rock or bone. Metals are fundamentally different from these other materials because they can be hammered into shape: they flow, they are malleable. Not only that, they get stronger when you hit them; you can harden a blade just by hammering it. And you can reverse the process simply by putting metal in a fire and heating it up, which will cause it to get softer. The first people to discover these properties ten thousand years ago had found a material that was almost as hard as a rock but behaved like a plastic and was almost infinitely reusable. In other words, they had discovered the perfect material for tools, and in particular cutting tools like axes, chisels, and razors. This ability of metals to transform from a soft to a hard material must have seemed like magic to our ancient ancestors. *** In 1961 Professor Richmond from Oxford University discovered a pit that had been dug by the Romans in AD 89. It contained 763,840 small two-inch nails, 85,128 medium nails, 25,088 large nails, and 1,344 extra-large sixteen-inch nails. The hoard was of iron and steel and not gold, which most people would have found bitterly disappointing. But not Professor Richmond. Why, he asked himself, would a Roman legion bury seven tons of iron and steel? The legion had been occupying the advance headquarters of Agricola in a place called Inchtuthil in Scotland. This was at the outer reaches of the Roman Empire, and their mission was to protect its border from what they saw as the savage tribes who threatened it: the Celts. The legion of five thousand men occupied the region for six years before retreating and, in the process, abandoning their fort. They made great efforts to leave behind nothing that could help their enemies. They smashed all food and drink containers and burned the fort to the ground. But they werent satisfied with this. In the ashes were the steel nails that had held the fort together, and they were far too valuable to be left to the tribes that had driven them out. Iron and steel were the materials that enabled the Romans to build aqueducts, ships, and swords; they allowed them to engineer an empire. Leaving the nails to their enemies would have been as useful as leaving a cache of weapons, so they buried them in a pit before marching south. Based on the excerpt, the reader can infer that Professor Richmond viewed the discovery of the Roman pit as A) Fascinating B)Disappointing C) Wasteful D) Intelligent 4. Which of the following is NOT a disadvantage of asexual reproduction?1do not need a mate2little genetic variation3mutations can occur4all susceptible to same diseases r(2s)(t) when r=2, s=3, and t=5 5.4 = -t/5.5 solve for t Amit solved the equation 5/12 = -x/420 for x using the steps shown below. What is Amit's error?5/12 = -x/4205/12(420) = -x/420(420)x = 175A: Amit should have multiplied both sides by 5/12B: Amit should have multiplied both sides by 12/5C: The product of 5/12 and 420 is not equal to 175D: The product of 5/12 and -420 should have been the value of x please help!!!which phrase from the preamble is best associated with the bill of rights?.more perfect union.blessings of liberty.common defense.domestic tranquility I would love some help :) isabels class has collected 90 cans in a food drive they plan to sort the cans into n bags, with an equal number of cans in each bag. write an expression to show how many cans there will be in each bag. how dose a long war with a high number of casualties generally affect civilians and soldiers opinions of their government ? The equation for the graph shown below in factored form? Vivian went on a bicycle trip through Germany with her family. One afternoon, she rode her bicycle along a long flat road at a constant speed for 24 kilometers (km). The ride took her 1.2 hours (h). At what speed did she ride her bicycle? How many slaves did the British transport across the Atlantic? If you were in charge of Distance Learning, what would you do to make classes better?I NEED EXAMPLES! GIVING POINTS :)!