Chemistry Middle School

PLEASE HELP ME WITH THIS!!!

You have been given an unknown plastic. You investigate and find out that the unknown plastic sinks in water but floats on dish soap.

Which plastic do you have?

A. PET

B. HDPE

C. PVC

D. PS

PLEASE HELP ME WITH THIS!!!You Have Been Given An Unknown Plastic. You Investigate And Find Out That

Answers

Answer 1

Answer:

D:PS

Explanation:

Looking at the table we can see that PS floats on dish soap and sinks in water.

Answer 2
the answer is D. PS!!!!!!

Related Questions

BRAINLY IF CORRECT

Select an animal from that you may know about and explain how physical and behavioral adaptations increase the chances of successful reproduction. Use evidence and scientific reasoning to support your response.

Answers

an animal could be the toucan, overtime it grew a longer beak in order to access food that other birds couldn’t get. this increases the chances of successful reproduction because being able to survive longer than other birds to the beak and providing food for the babies, they can reproduce multiple times

The cheetah (Acinonyx jubatus) will be the subject of my discussion. Cheetahs are the world's fastest land mammals, and they have evolved in both physical and behavioural ways to improve their chances of having offspring.

What is the behavior of  A Cheetah ?

First off, cheetahs have a highly effective circulatory system that includes bigger hearts and lungs, as well as a surplus of capillaries and red blood cells to carry oxygen to their muscles. This gives them the ability to pursue prey at speeds of up to 75 mph, increasing their likelihood of catching it and providing food for themselves and their young.

Second, cheetahs have a distinctive fur pattern that makes it simpler for them to blend into their surroundings and sneak up on their prey.and draw near enough for an effective assault. They can sprint rapidly and effectively because to their long legs and big feet.

Last but not least, cheetahs have a variety of behavioural modifications that improve their chances of having offspring. For instance, they create social groupings where the mothers look after the babies while the males go food hunting and guard the young from predators.

They also have a strong sense of smell that allows them to detect potential prey from far away. They get an edge in hunting and have a better probability of feeding their offspring as a result. In summary, cheetahs have a variety of morphological and behavioural adaptations that raise their likelihood of having offspring. Among these modifications is an extremely effective cardiovascular system.

Learn more about   behavioral adaptations at:

https://brainly.com/question/29767717

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What environmental change happens when the number of prey in a certain area decreases?

Climate change
Increased predators
Pollution
Reduced space

Answers

Question:

What environmental change happens when the number of prey in a certain area decreases?

Answer:

C) Pollution.

In an ecosystem, there is an increase in the number of predators when the number of prey in a certain area decreases.

What is an ecosystem?

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

Learn more about ecosystem,here:

https://brainly.com/question/13979184

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How do animals react to a change of environment when food and water become scarce?

They compete for sunlight.
They find more prey.
They grow in number.
They move to new locations.

Answers

They move to new locations.
I believe move to a new location

Which statement is false when describing magnetism and electricity

A Magnetism and electricity both use electrons


B Magnetism and electricity do not generate fields


C Magnetism and electricity are non-contact forces


D Magnetism and electricity are related forces

Answers

I am going for C, mark brainliest

Answer:

The correct answer is D

Explanation:

Hope this helped

What adaptation of vines help them grow on other plants in order to get more sunlight?

a plant growing on a tree trunk

Flexible stems
Large leaves
Strong roots
Thick bark

Answers

A. Flexible stems

This helps vines bend and stretch to reach higher on the tree or rock

Answer:

Flexible stems

Explanation:

Due to a vine's flexible stems, it finds a strong plant to grow on, slowly growing around it to get nutrience and light from the spot. without it, it would just sit on the forest floor.

BRAINLIEST IF CORRECT (put them in order)

Answers

Answer:

what grade are you in and i think it is D

Explanation:

Answer:

1 a person sings into a microphone

2 the sound is converted into an electrical signal

3 the analog signal is converted into a digital signal made of many samples of the digital sound

4 the samples of the sound is converted into 1s and 0s

5 the digital pattern is converted to a medium such as a hard disk or flash drive

Explanation:

Why is it so easy to see venus and so hard to see Neptune? Give two reasons

Answers

Answer:

Neptune is directly opposite the sun in Earth's sky

Explanation:

You need a telescope because its far away from earth and also the moon has phases so does the planets and now we have a full neptune.

Neptune is directly in front of earth Neptune is diresctly opposite of the sounds earth

if max has a blood type AB and ava is pure bread blood type A, What is the chance their child will have blood type A, B, AB, O

Answers

Ou heredity I love it!

So we have our Punnett square- (sorry about the a. Bad handwriting, and b. Chalkboard) - with max (AB) and Ava (AA) which we would then fill in to look like this- (photo 1)

So it’s 50/50 for their children to have blood type A, and 50/50 for the kids to have blood type AB, and impossible for them to have blood types B, or O.

I am a middle schooler, and if I am wrong or worded something incorrectly please tell me so I can learn it! Thank you and hope this helps!
50% change blood type A 50% Chance they’ll blood type AB

Is this a chemical reaction?

Answers

Answer:

I dont think so.

Explanation:

A chemical reaction is when there is a change in the substance. For example fizzing, bubbling, and changing colors are all examples of a chemical reaction.

It’s robably not hun x

What adaptations allow a camel and a cactus to survive in warm environments?

A camel has long legs, while a cactus grows deep roots.
A camel has thick fur as a body covering, while a cactus has a waxy coating.
A camel stores fat in its hump, while the cactus stores water in its thick stem.
A camel travels long distances in sunshine, while a cactus grows in the shade.

Answers

Answer:

A camel stores fat in its hump, while the cactus stores water in its thick stem.

Explanation:

A camel stores fat in its hump, while the cactus stores water in its thick stem.

In self heating cans, the chemicals in two compartments react with each other and forms……..

Answers

calcium hydroxide : chemicals are Quicklime and water

Quicklime and water

Where is a magnet the strongest?

Answers

Answer:

North and South pole

Explanation:

Magnets are usually made of metal. They repel and attract other metal. A magnet's force is strongest at its north and south poles. Each magnet is surrounded by lines of force and a magnetic field.

North and south pole




Explanation: most reasonable answer

BRAINLIEST IF CORRECT

Answers

Answer:

When you have many birds for one and they eat these berries (All Berries have seeds) then you have these birds dropping their feces all over the country and others Then that spreads these plants and berries to new places.

Explanation:

This is also known as Seed Dispersal.

Please mark as Brainliest

Hope this helped

Since it produces a very powerful scent that attracts pollinating animals the animals then come and eat the berries and also drink nectar from the flowers and then go and spread the seeds everywhere

BRAINLIEST IF CORRECT

Answers

Answer:

1 a person sings into a microphone

2 the sound is converted into an electrical signal

3 the analog signal is converted into a digital signal made of many samples of the digital sound

4 the samples of the sound is converted into 1s and 0s

5 the digital pattern is converted to a medium such as a hard disk or flash drive

Explanation:

Correct ^^^^^^^^^^^^^

Pick the correct relationship between magnetic poles

A North poles attract both like and opposite poles


B South poles attract both like and opposite poles


C Opposite poles repel while like poles attract


D Like poles repel while opposite poles attract

Answers

Answer:

D

Explanation:

All magnets have north and south poles. Opposite poles are attracted to each other, while the same poles repel each other. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction. The force generated by the aligned atoms creates a magnetic field.

D. Like poles poles repel each other and attract opposite poles, just think of the phrase “ Opposites attract”

BRAINLIEST IF CORRECT

Answers

the answer is A. can i get brainliest
I believe the answers is a

Which option is an example of a chemical property?


melting point


density


ability to decompose


color

Answers

Answer:
The ability to decompose
Explanation:
A property is a chemical property when it changes the chemical structure of a substance after a reaction.
Density and color are both physical properties.
Even though melting point may seem like a chemical property, when something melts, only the physical state changes, and the chemical structure does not change, and therefore, is a physical property.
The ability to decompose is a chemical property. When something decomposes, the chemical structure of many molecules change, and therefore, is classified as a chemical property.
Ability to decompose

BRAINLIEST IF CORRECT

Answers

Answer

its physical adaptions

I think is physical adaptations

4. Which of the following is a solution? *

Answers

Answer:

chemistry- A homogeneous mixture

a solution is also something to solve a problem

as
d
d
f
f
g

hh ⃤
⃤ ⃤ ⃤ ⃤ ⃤

BRAINLIEST IF CORRECT

Answers

Answer:

Digital recordings

Explanation:

Digital recordings are just better because one: you don't have to wait a long time for the music. It's like streaming movies, but for music.

You can download digital recordings.

You can share digital recordings using social media or text messages.

Digital recordings Because

They’re much easier to share

It’s much easier to listen too

And you don’t need some big device to listen to it

BRAINLIEST IF CORRECT

Answers

Answer:

indeed!

Explanation:

Yeassssssssssssassssss

please help me before june 13th
Place the following items in the correct order to show how a voice could be recorded and saved using a digital device.

Answers

Answer:

1. person sings

2. sound converted into signals

3. sounds converted into ones and zeros

4. the digital pattern

5. the analog

Explanation:

1.People sings Sounds converted

BRAINLIEST IF CORRECT

Answers

Answer:

The answer is the first three

Explanation:

I had this question and got it correct

Answer:

a b c

Explanation:

What is the molarity of a solution that contains 50.0g of NaOH (molar mass = 40 grams/mole) in 2.0L of solution?

Answers

It is 39.997 molarity
39.997
hope this helps

BRAINLIEST IF CORRECT

Answers

Answer:   True

Explanation:

Traveling in herds helps fight off predators, since there is strength in numbers. It's only when a deer is separated from the herd is when that animal is in trouble, and has a higher chance of getting eaten.

Males fighting for females is an example of survival of the fittest, so to speak. The female deer decides which male is the strongest which in turn helps pass on strong genes to the next generation.

Both of these traits help lead to successful reproduction and helps the species overall.

The answer is true by the way

PLEASE HELP ME LIKE RIGHT NOW!!

Answers

Answer:

Can't be answered without the lab.

Where is the lab? I can't answee without it

Which statement best describes how increased predators affect the organisms in an area?

There will be fewer prey for other predators.
There will be more prey for all predators.
There will be reduced space for other predators.
There will be a lack of water for all predators.

Answers

The first one.

There will be fewer prey for other predators

The first one makes the most sense

Marine organisms trying to live in the water may not get enough oxygen to survive. Based on this description, which of the following is true?
A.
The supply of any nonliving factor supports or limits growth of all organisms in an ecosystem in the same way.
B.
The number of organisms of each type in an ecosystem depends on living factors but not on nonliving factors.
C.
Living factors, such as the number of producers present, play the largest role in the survival of organisms in an ecosystem.
D.
Nonliving factors, such as the amount of nutrients available, significantly affect the survival of organisms in their environment.

Answers

The answer is B i’m pretty sure! Hope that helped you out! have a great day:)

Answer:

D.

Explanation:

The example of the Gulf Coast dead zone suggests that nonliving factors, such as the amount of nutrients available, significantly affect the survival of organisms in their environment.

Most organisms that were living on or near the ocean floor near the Gulf Coast dead zone could not survive in such low levels of oxygen and either moved to new areas or died off. Scientists are concerned with the size and rapid growth of the dead zone. Preventing the overuse of fertilizers and chemicals that allow excess nutrients to enter the water can help reduce the size of the dead zone.

Hey guys im gonna fail if i dont get these answer theses question right pls help me science is so hard

Answers

Answer:

Answer choice A

Please mark brainliest

The answer would be A

Which of the following is the only contact force?

A Gravity

B Applied

C Magnetism

D Electricity

Answers

My guess is B.
You can’t touch gravity or electricity. Applied just makes sense lol

Answer:

Explanation:

Free point SHEEEEEEEEEEEEEEEEEEEESH how you like it

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