Chemistry Middle School

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

Answer 1
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Answer 2
yes t o m m y i n n i t
Aa Decrease In The Number Of Zebra Mussels Along The Waterways Ban Increase In The Number Of Zebra Mussels

Related Questions

HELP plz
Are beaches made from erosion or deposition?

Answers

Answer:

Desposition

Explanation:

Answer:

Deposition

Explanation:

Beaches are wave-deposited accumulations of sediment.

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

The shape of the illuminated portion of the Moon as seen by an observer, usually on Earth:
1. Lunar Eclipse
2. Solar Eclipse
3. Moon Phases
4. The Sun

Answers

Answer:moon phases

Explanation:

Moon phases because the moon phases changers every day

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 .

plz mark my answer as brainlist plzzzz.

hope this will be helpful to you.

I think it is D you can mark the person above me brainlest

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



Public Domain

Answers

Answer:

it is

Explanation:

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

Could you add a screenshot so we know what's being asked please?

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.

What type of eclipse is pictured below?

Answers

The Solar Eclipse................

When potassium metal is added to water, a violent reaction occurs that releases a tremendous amount of light and thermal energy. This is an example of an _________ reaction.
1). endothermic
2). exothermic

Answers

Answer:

An Exothermic reaction.

Explanation:

An exothermic reaction produces heat, while endothermic reactions absorb heat

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.

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

What would u write in a THESIS for Piney Woods?
GIVING BRAINLIST WHO EVER ANSWERS WITH PARAGRAPHS!

Answers

Answer:

Your thesis statement belongs at the end of your first paragraph, also known as your introduction. Use it to generate interest in your topic and encourage your audience to continue reading.

Explanation:

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Answer:

There is not a wrong answer for creating a thesis. The thesis reflects the many opinions you have towards the particular script. Use what you have learned from reading this and create a morale. If you have an opinion about it, try clearly stating it. Anything works. Just think of it as a bridge. Can it support the many ideas you have? REMEMBER stay on track and dont over think it!

Explanation:

CH4 + __O2 → CO2 + ___H2O

balance this equation

Answers

Explanation:

need points bye have good day

Answer:

CH4+2O2→CO2+2H2O

Explanation:

Start with the least common atoms and leave things like H and O to the end.

You need to have the same number of methane reactants as carbon dioxide products because there is one carbon in each. I’ll set them both to 1 for now. O see two things with oxygen on the product side so we will have to juggle numbers a bit to figure out those. There is only H in the water so we’ll go there next. One CH4 gives 2 water molecules so we have that done now. At last we can tackle the O atoms. In two waters there are 2 and in the CO2 there are two more so a total of 4 O atoms in the products so we need two O2 molecules in the reactant side.

Hope this is useful.

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.

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

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.

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.

label the following as a pure substance or a mixture.

Answers

Answer:

b

Explanation:

can you help ,meeeeee

Answer: a mixture

Explanation:

A boat is traveling to the right at 300 N, the current is going to the left at 600N. What is the net force and direction?

Answers

it would be 800n to the right
i’m pretty sure it’s 300 N but it could also be 800 N . the only reason i thought it was 300 N was because since they go the other direction they should cancel each other out by doing 600 - 300 which is 300 N. but yeah

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:

Match the following vocabulary words with the correct definitions.

1. amount of matter in an object
matter
2. anything which has mass and occupies space
molecule
3. measurement of the pull of gravity on an object
atom
4. molecule with different atoms chemically united
mass
5. chemical combination of two or more atoms
weight
6. smallest unit of matter
compound

Answers

1. Mass
2. Matter
3. Weight
4. Compound
5. Molecules
6. Atom

What is unique about obtaining water from an artesian well?

The water is heated by magma or hot rocks.
The water is found in an impermeable layer.
The water is under pressure naturally and no pump is needed.
A mechanical pump must be installed to bring water to the surface.

Answers

Answer:

The water is under pressure naturally and no pump is needed.

Explanation:

C

The water in artesian wells is under natural pressure and requires no pump.

What are artesian wells?

They are wells that contain water that is under natural flowing pressure. Thus, there is no need of using artificial pumps in order to get the water to the surface.

Artesian wells are dug on lands with special geological features that enable the water to flow out under natural pressure.

Artesian wells differ from other types of wells that require mechanical or electric pumps before the water can get to the surface.

More on artesian wells can be found here: https://brainly.com/question/8881413

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The wastewater in your home goes to one of three places. It can run into a home septic system, it can go to a centralized sewage treatment plant, or it might be directly discharged into a body of water. Where does your water go after it goes down the drain?

Answers

Answer:

Sewage Treatment

Explanation:

I am sorry if I got this wrong but if I did please correct me!

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.

To know more about exothermic reaction, visit;

https://brainly.com/question/28546817

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Plz helpppp
1. What causes a delta to form at the mouth of the river?
A. Wind
B. Water
C. Ice
2. A cliff forms by the ocean. (Erosion)
A. Wind
B. Water
C. Ice

Answers

Answer:

Water

Water

Explanation:

Answer:

1 Water 2 wind

Explanation:

is the answer

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

Answers

You did not provide the possible answers.

How is salinity affected?
(a) evaporation increases
(c) freezing increases
(d) melting increases
(e) precipitation increases

Where does the energy that causes evaporation come from?
What role does gravity play in the water cycle?
Describe the flow of one molecule of water through the water cycle, beginning in the ocean.

Answers

Answer:

A and E.

Explanation:

 When water evaporates, it leaves the salt. When rain falls, the salt is diluted. The sun causes the  evaporation. The also the sunlight is the energy source, the greatest force propelling the water cycle is gravity. Gravity is the force of attraction between two objects, and Earth’s gravity pulls matter downward, toward its center. It pulls precipitation down from clouds and pulls water downhill. Gravity also moves air and ocean water. Also Water travels in a continuous path through Earth called the water cycle. The journey starts in the Earth's oceans. As the Sun heats the ocean, the water evaporates into a gas. The gas meets cooler air, and the gas changes into droplets of tiny water molecules. This process is called condensation. Little droplets of water fall back down to Earth again as precipitation. The precipitation fills up the rivers and various other things and the cycle begins all over again. Now with this being said, there is much more than just this!

     Good luck!

The answer is A hope this helped :)

Fill in the chart to describe and give examples of physical changes.

Answers

Answer:

here are some examples of physical change!!!

Explanation:

-An ice cube melting into water in your drink.

-Freezing water to make ice cubes.

-Boiling water evaporating.

-Hot shower water turning to steam.

-Steam from the shower condensing on a mirror.

Answer:

Examples:

Melting an ice cube.

Boiling water.

Mixing sand and water.

Breaking a glass.

Dissolving sugar and water

2. Calculate: For each object, substitute the values you know into the gravitational potential energy equation to solve for weight. Record each object's weight in the fourth (science)

Answers

Answer:

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Explanation:

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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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