Chemistry Middle School

I REALLY NEED HELP QUICKLY!!

I REALLY NEED HELP QUICKLY!!

Answers

Answer 1

Answer:

i think the answer is c

Explanation:

Answer 2
C) All of earth was once filled with water or ice

Related Questions

Which of the following has the greatest influence on the size and force of waves?
A.
seasons
B.
Moon’s gravity
C.
wind speed
D.
Earth’s gravity

Answers

wind speed bc The faster the wind, the longer it blows, or the farther it can blow uninterrupted, the bigger the waves.
c. wind speeds


i need 20 soooo

1. What are characteristics and examples of bryophytes?

2. What are characteristics and examples of protists?

Answers

Answer:

characteristics of bryophytes:

1) the plant body is gametophyte

2) the plants are green and possess chloroplasts

3) he plant body lacks true roots,stem or leaves

4) vascular tissue are completely absent

examples: liverworts, the hornworts, mosses

characteristics of protists:

1) some are multicellular, most are unicellular

2) some are autotrophic, some are heterotrophic

3) they have a nuclear and membrane bound organelles

4) they can be parasites

examples: algae, amoeba, euglena

Explanation:

What is formed when the number of electrons is changed?


Question 1 options:


ion



radioisotope



isotope



a new element

Answers

Answer:

ions.....................

Answer:

ions? t.b.h i have no idea

Which of the below choices is NOT one of the pieces of evidence for the existance of Pangea?

Answers

Answer: B

Your welcome

please help please lol

Answers

Answer:a and d

Explanation:

The answer would be A and /or D

The equator is at a latitude of 0°. Which latitude will have the warmest temperature?

Answers

Answer:

There is a relationship between latitude and temperature around the world, as temperatures are typically warmer approaching the Equator and cooler approaching the Poles. There are variations, though, as other factors such as elevation, ocean currents, and precipitation affect climate patterns.

Explanation:

0 will have warmest

I need help with these questions from 8th Grade science, Specifically Chemistry.
Answers should be detailed, 3-4 sentences.

List at least 3 different physical properties or changes of a substance.

List at least 3 different chemical properties or changes that a substance can experience.

EXPLAIN YOUR ANSWER! NO LINKS! PLEASE DON"T ANSWER JUST TO GET POINTS!
I will report your answer if you do any of those things.
Thx in advance!

Answers

Answer:

Physical properties of a substance can include color, temperature, and mass. These are physical properties because they can be measured without changing a substance's chemical identity. Chemical properties of a substance can include flammability, acidity, and reactivity. These are chemical properties because they can be measured only by changing a substance's chemical identity.

15 points?
Extinction of a species is most likely to NOT occur in which example?
A. the organism is larger and stronger than others in it's environment
B. the organism is smaller and smarter than others in its environment
C. the organism is larger and smarter than others in it's environment
D. the organism is able to survive and reproduce more than others in it's environment

Answers

Answer:

D. the organism is able to survive and reproduce more than others in it's environment

Explanation:

It will only go extinct if it can't survive or reproduce.

D. Because extinction=Something being extension/bye-bye

The main function of the respiratory system is to –


A. filter body fluids to remove waste products from the bloodstream.


B. send signals in the form of hormones to the body to control growth, reproduction, and metabolism.


C. rapidly communicate specific information using electrical impulses.


D. exchange gases, mostly carbon dioxide and oxygen, between the body and the atmosphere.

Answers

The answer is d I believe
The answer is D. Exchange gases, mostly carbon dioxide and oxygen, between the body and atmosphere!

I will mark brainlist for best answer!
Write a full paragraph about:
What causes changes in ecosystems?

Answers

Causes changes in Ecosystems
Important direct drivers include habitat change, climate change, invasive species, overexploitation, and pollution. Most of the direct drivers of degradation in ecosystems and biodiversity currently remain constant or are growing in intensity in most ecosystems

I hope it helps.. if it doesn’t please comment I’ll post another answer..

Factors that change the ecosystems are called drivers.

There are direct and indirect drivers.

Direct drivers straightforwardly influence ecosystem process.

Indirect drivers operate more diffusely, By altering one or more direct drivers.

Some direct drivers:

Habitat change Climate change Pollution Invasive speciesOverexploitation

Some indirect drivers:

Population change Change in economic activity Sociopolitical factorsCultural factors Technological changes

What is the function of tunnels and passageways in subsurface mining?
a. to reach mineral ore deep below the surface of the earth
b. to reach mineral ores on the surface of the earth
c. to drain underground lakes where minerals are found
d. to create strip mines and quarries below the surface of the earth

Answers

Answer: to reach mineral ores on the surface of earth

Explanation:

ANSWER: b. to reach mineral ores on the surface of the earth

Please Help
Compare Earth 4 billion years ago to Earth 550 million years ago.

Answers

the earth 4 billion years ago was separated, there was very little land in the northern hemisphere. the further most part of today’s (550 million years ago) continents were in the southern (lower part) of earth.

hope this helps! have a great day! ❤️

Short Question: What is Hydropower?

Answers

The use of flowing water to power a turbine to produce electrical energy

Answer:

Hydropower is energy in moving water.

Explanation:

can someone help with this please right answers only and dont do #2

Answers

Answer: 1. Use goggles, lab coat, and ask instructor about any questions

Explanation:

5 I think it’s git a teacher

The equator is at a latitude of 0°. Which latitude will have the warmest temperature?

A. 15°N

B. 20°S

C. 45°N

D. 70°S

Answers

Pretty sure it is 20
The answer is b 20

Hope this helps:)

right answers only will be reported if not right and no lniks!!!!!!!!!!!!!!!!!

Answers

Answer:

The answer is D

Explanation:

fish endangered: 15.1

fish threatened: 6.6

More fish are endangered than threatened

A student uses a lever and fulcrum to lift a rock off the ground.
Which option describes when potential energy is converted into kinetic energy during this process?


a. when the lever is wedged beneath the rock but before it has been lifted

b. when the student presses down on one side of the lever to cause it to move

c. when the rock rests on the ground without the lever

d. when the rock rests above the ground

Answers

it has to me b because it shows what they did in this part
I think it’s b hope this helps

How does weathering and erosion contribute to the cycling of earth's materials? (specifically rock/the geophere)​

Answers

Answer:

Erosion breaks rocks down further and then moves them.

I need this answer right now please help!!!!!

1. Why did the naked egg swell when it is placed in water?

2. Why did the swollen naked egg shrink when it is placed in corn syrup??

Answers

Answer:

1.porque la cáscara del huevo es semipermeable, es decir, hay sustancias que pueden pasar al interior del huevo o salir de él. En esta ocasión parte del líquido ha entrado dentro del huevo

2.Los huevos se encogen en el jarabe de maíz debido a la ósmosis. La ósmosis es el proceso por el cual el agua entra y sale de las células a través de una membrana semipermeable.

El agua entra y sale de los tejidos a través de la ósmosis. Durante la ósmosis, el agua entra o sale de la célula a través de la membrana semipermeable de la célula. Esta membrana es esencial para permitir que los materiales vitales entren en las células sin permitir el paso de materiales no deseados o peligrosos. Durante la ósmosis

Explanation:

dame coronita plis me ayudas mucho

1.because the eggshell is semi-permeable, that is, there are substances that can pass into the egg or leave it. This time part of the liquid has entered the egg

2.Eggs shrink in corn syrup due to osmosis. Osmosis is the process by which water enters and leaves cells through a semi-permeable membrane.

Water enters and leaves tissues through osmosis. During osmosis, water enters or leaves the cell through the semi-permeable membrane of the cell. This membrane is essential to allow vital materials to enter cells without allowing unwanted or hazardous materials to pass through. During osmosis

Explanation:

give me a crown, please help me a lot

helppp this easyyyyyyyyyyyyyy

Answers

Answer:

Circulatory System -

Nervous System

Respiratory System

muscular system

What have you learned about isotopes from this simulation?

Answers

AnswerI dont Know?

Explanation:

just write down what you’ve learned…?

I need help please j

Answers

Reactants Hydrogen: 5
Products Hydrogen: 5

Reactants Carbon: 3
Products Carbon: 3

Reactants Oxygen: 4
Products Oxygen: 5

I´ll mark branlist for the best answer!!!
Write a paragraph (5-8 complete sentences) answering the prompt＂How does the availability of resources in ecosystems impact ecosystems?＂

Answers

5-8 Sentences on: "How Does The Availability Of Resources In Ecosystems Impact Ecosystems?"

Changing out natural resources in our environment can affect the whole entire ecosystem.  Ecosystems can change throughout time but the change may or may not affect the ecosystems.  But according to research, if the change is too fast the whole ecosystem can be destroyed.  An imbalanced or damaged ecosystem can lead to problems.  Certain resources play an important role such as sunlight and water, we need resources to survive and can also help living creatures.  These resources impact animals, plants, and insects/bugs.

P.S If you need more sentences I will edit my answer!

           Hope this helps!

      ~Hocus Pocus

Find the average kinetic energy of the molecules shown in the sample above. ( C and D are wrong )
a. 5
b. 4
c. 3
d. 36

Answers

Answer: B

Explanation:

Answer C and D are wrong , so there for the answer is B.4

As the wavelength of a wave increases, the frequency ___________.

remains the same

increases

decreases

Answers

Answer:

It would C.) decrease, I hope this helps! : )

It’s C because “increases”

What did you observe happening in the cups?

Did a phase change or phase changes occur? If so, which one or ones?

Answers

I think it gets foggy in the cup i think but good luck!!
a phase change will occur , it will first become blurry due to water vapour evaporating and cool down to tiny water droplets when coming in contact with the plastic cup ( hope im right , its been awhile! )

In the process of precipitation, liquid water changes into water vapor and enters the atmosphere.
True or False?
:p

Answers

Answer:

true

Explanation:

Very true:)! Why does the sentence have to be so long

What type of plate boundary is shown below?

Answers

Answer:

B. Convergent  Boundary

Describe what bacteria are - their parts, how they can be good, how they can be bad, and the different types.

Answers

HIIII, so.... In all there are two different types of Bacteria good bacteria and bad bacteria, the good bacteria helps fight off diseases and other sickness the bad bacteria can make you sick.

I hope that was enough to answer your question!!!

Have a good day and I hope you pass all of your exams!!!!! <3

Bacteria are living micro organism they Can be good or bad depending on the type an example for a good bacteria is the bacteria that lives in your stomach it helps you digest food and then example for bad bacteria is a virus that can get you very sick bacteria

Species acquire many of their unique characteristics through
A. Homologous structures
B. Homeostasis
C. Pangaea
D. Variation

Answers

Its A homologous structures
Other Questions
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