U-Science-Gr8-Unit2-PBT-CBT (2020-21)
Question: 1-10
Different arrangements of atoms are shown in the figure below.
8
Key
. - hydrogen
O = oxygen
O carbon
8
Figure 1
Figure 3
808
ag
808
OS SO
ag
cs
os
808 308
80
808
as
80
Figure 2
Figure 4
Which figure represents a mixture?
Figure 1
Figure 2
Figure 3
Figure 4

Answers

Answer 1

Answer:

Figure 3

Explanation:

A mixture is a substance made up of two or more different kind of atoms arranged in such a way that they are not chemically linked or joined. This accounts for the reason a mixture can be separated easily. In the figures attached as an image in this question:

- Figure 1 represents an element because it is made up of only hydrogen atoms chemically bonded together to form a molecule.

- Figure 2 represents a compound because it contains hydrogen and carbon atoms chemically joined together.

- Figure 3 represents a MIXTURE because it contains the oxygen and carbon atoms, which are not chemically joined to one another. As seen in the image, the oxygen atoms are not joined to the carbon atoms.

- Figure 4 represents a compound because it contains oxygen and hydrogen atoms chemically bonded together.

Related Questions

How long is the Lechuguilla cave?

Answers

i believe it’s 138.3 miles

HELP WILL MARK BRAINLIST !!!

Answers

Answer: 9. is D

10. is A

Explanation:

Answer:

the 2 at the top:

1. unicellular cells are made of 1 cell

2. multicellular cells are made of many cells

the middle ones:

very sorry don't know those ones

the last ones:

prokaryote goes to B

eukaryote goes to C

unicellular goes to D

multicellular goes to A

Explanation:

sorry i couldn't help that much :/

Why is red light the best for photosynthesis?

Answers

Answer:

The primary reasons why LED fixtures emit a lot of red are 1) red LEDs are among the most efficient at converting electricity into photosynthetic photons, 2) chlorophyll strongly absorbs red light, thus it is effective at photosynthesis, and 3) red LEDs are relatively inexpensive

what is the difference between stimulus and stimuli

Answers

Answer:
Stimulus is singular
Stimuli is plural

Cellular Respiration and photosynthesis are related in that they are opposite of each other. The products of one process are the reactants of the other.

True

False

Answers

Answer:

This statement is true.

Explanation:

because during photosynthesis , oxygen is produced because of the reaction of carbon dioxide, and water in the presence of sunlight. oxygen and glucose are synthesized during photosynthesis while on the other hand, oxygen is used in respiration and carbon dioxide is produced which again used by plants.

I would greatly appreciate it if some can Please help me asap!!!
Which kind of root system would more likely benefit a desert plant----a taproot or a fibrous root system? Why?

Answers

Answer:

A taproot

Explanation:

A taproot will most likely benefit a desert plant because a taproot is a large long root that gets deep into the soil because in a desert the soul isnt fertile and is also sandy so a fibrous root system would be less beneficial because it will absorb less nutrients and will have a hard time clinging on a sandy soil while a taproot can reach further into the fertile part of the soil.

Which is one physical property that all stars have?

Answers

Answer:

They all has gases in them also they all are bright

Explanation:

hopefully this helps

Answer: They are made of gases such as hydrogen and helium. They shine very brightly due to the interaction of hydrogen and helium at appropriate pressure and temperature. They contain iron in their cores which monitors the fusion reaction

Explanation:

What type of cell is mostly square or rectangular shaped? *
O A animal
B bacteria
C plant
O D fungus

Answers

Answer:

It would be >> C plant cells

why are region called promoters essential to RNA transcription?

Answers

Answer:

hope that helps :)

A promoter is a region of DNA where transcription of a gene is initiated. Promoters are a vital component of expression vectors because they control the binding of RNA polymerase to DNA. RNA polymerase transcribes DNA to mRNA which is ultimately translated into a functional protein.

Promoter. A promoter is a sequence of DNA needed to turn a gene on or off. The process of transcription is initiated at the promoter. Usually found near the beginning of a gene, the promoter has a binding site for the enzyme used to make a messenger RNA (mRNA) molecule.

Source: Google

why do some root cell have root hair

Answers

Answer:

Root hairs form an important surface as they are needed to absorb most of the water and nutrients needed for the plant. They are also directly involved in the formation of root nodules in legume plants. ... Having a large surface area, the active uptake of water and minerals through root hairs is highly efficient.

Answer:

Explanation:

Root hairs appear when the epidermis differentiates. The epidermis has specialized cells that are root hair cells. Much attention has been given to root hairs because of their presumed importance as absorbing surfaces.

if there's 23% cytosine how much adenine

Answers

I'm going to tell you how to find the answer yourself so you can figure out other problems like it.

First, DNA is made up of those four nucleic acids. Adenine always pairs with Thymine in DNA. Guanine always pairs with Cytocine.

Therefore, the amount of Adenine will always equal the amount of Thymine in DNA. The amount of Guanine will always equal the amount of Cytocine.

So, if Adenine equals 23% of your sample and Adenine equals Thymine, then Thymine equals 23%.

Add the amounts of Adenine and Thymine. 23% + 23% = 46%

100% - 46% =

That gives you the percentage of Cytocine and Guanine together. Since they are in equal amounts, divide by two and you have the percentage of each.

please help.
1. When does it finish boiling
2. When does the potential energy come
PICK A LETYERY

Answers

Answer:

1. F 2. F

Explanation:

im not sure about the second one tho but im definitly sure about the first one :)

An atom of argon contains 18 electrons. Describe how these electrons would be arranged. You may find
it helpful to draw a diagram.
Argon is a gas at 20°C (room temperature). Predict which state neon is at this temperature and give a
reason for your answer.

Answers

Answer:

a. The electrons are configured in a 2-8-8 order with 8 valence electrons. There are three full shells.

b. Because Argon and Neon are in the same group, they have very similar properties, so we can guess they would be in the same state. Neon would be a gas.

3 process that directly add carbon dioxide to atmosphere?

Answers

Answer:

Carbon dioxide is added to the atmosphere naturally when organisms respire or decompose (decay), carbonate rocks are weathered, forest fires occur, and volcanoes erupt. Carbon dioxide is also added to the atmosphere through human activities, such as the burning of fossil fuels and forests and the production of cement

respiration, human combustion and ocean-atmosphere exchange

The cell theory states that all living cells come from pre-existing cells. If that's true then, how did the first cell originate?

1 not enough information is given
2 Nature created the first cell.
3 The first cell originated spontaneously.
4 This postulate of cell theory is false.

Answers

Answer:

option 2 and 3 are seems to be correct.

Explanation:

according to our studies the options and 3 are seems to bee correct because the first cell was created by nature not by man or any other organism and the term spontaneously also look to be true. so my answer is that options 2 and 3 are correct.

How many days does it take the moon to orbit earth?

A. 36.2

B. 1

C. 23.5

D. 29.5

Answers

Answer:

D.29.5

Explanation:

it's takes 29.5 days to orbit the sun

Which organelle makes proteins?
*
o
A chloroplasts
O B nucleus.
C ribosomes
O D Golgi apparatus

Answers

c ribosomes is ur answer
mark me brainlist plz :)

Answer: RIBSOMES

Explanation:

none

PLEASE HELP ME!!!
Help me by naming all the moon phases that are happening in each number.
Please, and Thank You!
Will Mark Brainliest!!!

Answers

Answer:

1. new moon

2. waxing crescent

3. first quarter

4. waxing gibbious

5. full moon

6. waning gibbious

7. third quarter

8. waning crescent

These structures are found in the nucleus of dividing cells they appear x -shapped

Answers

Answer:

Because each duplicated chromosome consists of two identical sister chromatids joined at a point called the centromere, these structures now appear as X-shaped bodies when viewed under a microscope. Several DNA binding proteins catalyze the condensation process, including cohesin and condensin.

Explanation:

which macromolecule provides the blocks for recovery and repair in forming new muscle?

Answers

Answer:

It hast be protein

Explanation:

Answer:

Protein

Explanation:

Proteins provide strength,structure,and support for the body.

2. How are the circulatory, respiratory and lymphatic systems related to each other? specific.

Answers

Nooooooo oooo oooo oooo

Match each moon or planet to the most accurate characteristic

.A. Earth's moon
B. Venus
C. Europa
D. Mars

1. It contains large amounts of frozen water
2. The temperature of its atmosphere is increased by high levels of carbon dioxide
3. It doesn't have enough gravity to have an atmosphere
4. Astronomers believe there is a good chance it contains liquid water

Answers

Answer:

a to 3

b to 1

c to 4

d to 2

im sorry if some of these are wrong hope this helps a little bit :)

Where does the mass come from when growing an oak tree I need to write a paragraph so someone help me

Answers

A tree's mass is mainly biomass. During photosynthesis plants, the carbon is used to transform the Sun's energy into chemical energy that is captured in the bonds of carbon molecules made of atmospheric carbon dioxide and water

Match each form of energy with its definition. The energy of the bonds between atoms.

mechanical energy

Kintetic energy

Chemical energy

potential energy

Answers

chemical energy, hope this helps. Correct me if im wrong but im sure its chemical energy

8
Organisms evolve due to changes in their DNA called
A
growing
B cellular respiration
mutations
D
recombination

Answers

Answer:

Mutaciones

Explanation:

Los cambios genéticos incluyen mutaciones causados por errores en la replicación del ADN de un organismo

Answer:

b cellular respiration

Which statement is scientifically based? Mutations rarely occur. All mutations are harmful. Some mutations can be contagious, like infections. Mutations are not passed from parent to offspring.

Answers

Answer:

Mutations rarely occur

Explanation:

Did the Test and got it correct have a nice day

The scientific statement is; "Mutations rarely occur."

A scientific statement is a statement that is empirical. This means that the statement can be proven experimentally not just by mere logical reasoning. Science is empirical and does not depend solely on logic.

The statement which is scientifically based according to the options in the question is; "Mutations rarely occur. ."

Learn more: https://brainly.com/question/17106056

Which stage of cellular respiration produces the largest amount of energy?
Stage one

Stage two

They produce an equal amount of energy

Answers

The answer is Stage 2

Stage 2 hope this helps

Explain the relationship between coral and algae, and how a problem with algae photosynthesis caused coral bleaching in the Great Barrier Reef.
How did water from the Great Barrier Reef affect ATP, NADPH, and sugars?
explain how you know that paraquat did not cause the coral bleaching.

Explain why you know that diuron caused the coral to bleach.

Answers

Answer:

mutualistic relationship.

paraquat is a herbicide.

Diuron is a algaecide.

Explanation:

mutualistic relationship is present between coral and algae. Paraquat did not cause the coral bleaching because paraquat is a herbicide which is used to kill weeds not algae. We know that coral have small algae attached to its body which is responsible for its colour so if we apply paraquat, it does not kill the algae and so coral bleaching did not occur. if we apply diuron which kills algae so it causes coral bleaching and the coral becomes white.

Which two statements describe processes most likely to be involved in the
formation of sedimentary rock?
I A. Rivers flow across many miles into a body of water.
OB. A volcano erupts near a coastline.
OC. Tectonic plates push on each other underground.
O D. Windstorms blow regularly near rocky cliffs.

Answers

Answer:

the answer would be A and D

Explanation:

Rivers flow across many miles into a body of water

windstorms blow regularly near rocky cliffs.

thanks

The electrons are outside the nucleus and have a negative charge?

Answers

Answer:

Correct!

Explanation:

Other Questions

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