Answers
Answer:
B, C, D
Explanation:
Polyatomic ions are ions that have more than 1 atom.
Related Questions
What is the property that allows the oil and vinegar to appear separated in this salad dressing and to each go to the top/bottom of the bottle. Is this a chemical or physical property?
Answers
Answer:
physical
Explanation:
I need help quickly, this assignment is due in a few hours. I have a few 8th grade science questions I need help with. These is not need to explain your answer, just tell me if the answer is a,b, or c. Also, please answer all of the questions listed not just some of them. I will be giving 20 points if you answer, and brainly to the first person to answer. The questions look really complicated but it is mainly just a long description. The questions themselves seem simple.
QUESTION ONE : Miranda was learning to bake bread at home. Her first few batches of dough did not rise, or expand, as much as they should have. Miranda's mother noted that the kitchen was cold and suggested that the dough might not be warm enough to rise. Miranda decided to test her mother's suggestion. She made a large batch of dough and divided it into six equal-sized balls. Then, she put each ball into a bowl. She left three bowls on the counter in the kitchen, where the temperature was 63oF. She left the other three bowls on her desk in her upstairs bedroom, where the temperature was 80F. After one hour, Miranda measured the size of each dough ball.
Which of the following was the dependent variable in the experiment?
a. the temperature where the dough was left to rise
b. the ingredients used to make the dough
c. the size of each dough ball
QUESTION TWO: Jada liked to make guacamole, but she could often find only unripe avocados at the grocery store. In biology class, Jada learned that ripe fruits produce a gas called ethylene that can cause other fruits to ripen. Jada wondered whether storing ripe bananas with unripe avocados would make the avocados ripen faster. Jada prepared four paper bags with five unripe avocados in each bag. She added on ripe banana to two of the bags. Then, Jada sealed all four bags. After three days, she opened each bag and counted the number of ripe avocados in each bag.
Which of the following was the independent variable in this experiment?
a. the type of paper bag used
b. the number of bags with a ripe banana
c. the number of ripe avocados
QUESTION THREE: Colette was using steel to make rusted sculptures. After building each sculpture, she caused the steel in the sculpture to rust by placing it into tub filled with salt water for eight hours. Colette wondered if steel would rust faster submerged in vinegar instead of salt water. To find out, Colette cut ten squares of steel sheet metal and split them into two equal groups. She put one group of squares into a tub filled with salt water and the other group of squares into a tub filled with vinegar. Once an hour for eight hours, Colette counted the number of rusted steel squares in each group.
Which of the following was a variable that was held constant (control variable) in this experiment?
a. the type of liquid used
b. the size of the squares of steel sheet metal
c. the number of rusted steel squares
QUESTION FOUR: David divided 40 unripe bananas evenly among eight paper bags and sealed the bags. He poked 20 small holes in four of the bags and left the other four without holes. He kept the bags at room temperature for three days. Then, David opened the bags and counted the number of brown spots on each banana. He compared the average number of brown spots on bananas from bags with holes to the average number of brown spots on bananas from bags without holes.
Identify the question that David's experiment can best answer.
a. Do bananas develop more brown spots when they are kept at room temperature compared to in a cold refrigerator?
b. Do bananas develop more brown spots if they are kept in bags with holes compared to bags without holes?
c. Do bananas develop more brown spots when they are kept in brown paper bags compared to in a plastic bag?
QUESTION FIVE: Ten groups of chemistry students combined three solutions that, when mixed, chemically reacted and turned blue. Before mixing, five groups of students heated the solutions to 25C, and five other groups heated the solutions to 50C. The students recorded how many seconds it took for the mixtures to turn blue. Then, the groups shared their results, and the class compared the time it took for the mixtures to turn blue at 25C and at 50C.
Identify the question that the students' experiment can best answer.
a. Does the type of color the mixture produces depend on the temperature of the solutions?
b. Does the mixture of solutions release more gas when they are mixed at 25C compared to 50C?
c. Does the mixture's color change faster when the solutions are mixed at 25C or 50C?
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Question 2: A
Question 3: B
Question 4: B
Question 5: C
What is the center of a plant cell? The actual question is what’s the center of an onions root tip?
Answers
Chemical Weathering Rocks are changed by chemical and physical weathering. During chemical weathering, the composition of the rock is changed. Extreme heat and pressure within Earth can also cause rocks to change chemically. Physical weathering is the breaking down of rock by wind, water, ice, temperature change, and plants. It changes the shape and size of rocks, but it does not change their properties.
circle each example of chemical weathering
•Shale is worn into small pieces by the wind.
• Sandstone experiences heat and pressure and becomes quartzite.
• Calcium carbonate dissolves.
• Rocks break into pieces as they tumble down a mountain.
Answers
An example of chemical weathering are;
Sandstone experiences heat and pressure and becomes quartzite. Calcium carbonate dissolves.What is Chemical Weathering ?Chemical Weathering can be described as the type of weathering that do take place due to the breaking down of the rock particles into smaller pieces which is usually as a result of chemical process.
It should be noted that when the process is taking place it scould be due to the Extreme heat and pressure which can affect the composition of the particles and as a result of this there could be formation of products from the break down.
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Sandstone experiences heat and pressure and becomes quartzite
Calcium carbonate dissolves
These are both examples of chemical weathering because the composition of these things changed. When shale is worn into small pieces, it is still shale, and rocks breaking into pieces as they tumble down a mountain are both examples of physical weathering because the weathering is not changing the composition of the rock.
When Deshawn returned to his experiment, he observed these results. Six bottles labeled from 1 to 6 with their opening holes covered by balloons. Balloons on second and fourth bottles are inflated. Describe what you see in the results.
Answers
Answer: the second and fourth balloons have heat in them
Explanation:
Whenever there is heat in an object that hot gas rises and expands what ever is ontop of it like an air balloon.
God, cure my stupidity.
Answers
If you freeze 5 mL of water into ice and then let it melt, how much water will you have?
None
5 mL
10 mL
Unlimited
Answers
Answer:
5 MLS
Explanation:
This is true because energy can't be created nor destroyed. So If you have
5 mills of water. you will always have 5 mills of water. The reason for this is because the water just changes state from a liquid to a solid. If you turn it back into a Liquid. You will have the same amount.
Explanation: It’s the same amount of water, none was taken or added
Describe how the Rube Goldberg device design that you created follows the law of conservation of energy. Be sure to include both parts of the law of conservation of energy in your description.
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piece of roasted salted fish is put in a mouse trap. explainwhy the mouse comes to the trap
Answers
Answer: Food
Explanation:
The rat smells the food or sees the food it goes towards the food to eat it.
What physical property of mercury makes it best suited for use in a thermometer
Answers
Answer:
High coefficient of expansion
Explanation:
It is only mercury that is in liquid form at room temperature. It works on the principle of thermal expansion, it expands when heated and contracts when cooled. The very minute change can be notable by the use of mercury in the thermometer. So this property of the thermometer makes it suitable for measuring temperatures.
Brainliest to the best answer.
The sun's energy is responsible for the heating of ocean water molecules. How does thermal energy affect the movement of water molecules?
A) Thermal energy does not affect the movement of ocean water molecules.
B) Water molecules that have more thermal energy will sink, while water molecules that have less thermal energy will rise.
C) Water molecules that have more thermal energy will rise, while water molecules that have less thermal energy will sink.
D) Thermal energy causes ocean water molecules to move chaotically.
Answers
Answer:The heat source for our planet is the sun. Energy from the sun is transferred through space and through the earth's atmosphere to the earth's surface.
Explanation:
Explanation:
When water at the ocean's surface is heated by the Sun it gains energy. With enough energy, the molecules of liquid water change into water vapor and move into the air. This process is called evaporation.
Quartz, or silicon dioxide (SiO2), is one of the most abundant minerals on Earth. The diagram shows the atomic arrangement of quartz.
Based on the diagram, which statement best describes the atomic arrangement of quartz?
Group of answer choices
An extended structure that is made of repeating patterns of atoms.
A repeating pattern of small molecules that can move freely past each other
Many different kinds of molecules tha combine to form an extended structure.
Many different kinds of atoms that can move freely past each other.
Answers
Based on the atomic arrangement of quartz, it is can be concluded that quartz is an extended structure that is made of repeating patterns of atoms.
What is quartz?Quartz is a hard crystalline mineral found within the Earth's crust and which is composed mainly of the mineral silica. Silica is mostly silicon(iv) oxide.
Quartz is colourless and its crystalline structure is of a hexagonal prism. The atoms are arranged in a regular repeating grid to form the hexagonal crystal.
Therefore, it is can be concluded that quartz is an extended structure that is made of repeating patterns of atoms.
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Why are some incomplete fossils able to be pieced together? Full fossils of large animals can be found together. Hard tissue, like bone, never breaks or chips. Fossils require salt water to be preserved fully. Impressions from the skin can be preserved.
Answers
Answer:
Explanation:
The fossil record is considered to be incomplete because fossilization is a very rare phenomenon. Most organisms decompose quickly after their death, and their remains dispersed. In order for fossilization to occur, the remains have to be covered by sediments and stay undisturbed for thousands of years.
Answer:
The fossil record is considered to be incomplete because fossilization is a very rare phenomenon. Most organisms decompose quickly after their death, and their remains are dispersed. In order for fossilization to occur, the remains have to be covered by sediments and stay undisturbed for thousands of years.
Drag the tiles to the correct boxes to complete the pairs.
Match the inheritance patterns with the scenarios that exemplify them.
codominance
multiple alleles
incomplete dominance
A pink roses are formed when red roses are mated with white roses.
arrow -
Genes with the alleles IA, IB, and i are responsible
for expression of A, B, and O blood types.
arrow -
A red flower and a white flower produce
an offspring with equal proportions of red
and white coloration.
arrow -
Answers
Answer:
A Pink roses are formed when red roses are mated with white roses= incomplete dominance
Genes with alleles IA, IB and I are responsible for expression of A B and O blood types= Multiple alleles
A red flower and a white flower produce
an offspring with equal proportions of red
and white coloration= Codominace
Explanation:
Took quiz and got it right
A pink roses are formed when red roses are mated with white roses shows incomplete dominance.
What is incomplete dominance?Incomplete dominance is defined as the dominance occurs from a cross in which each parental contribution is genetically distinct and produces children with an intermediate phenotype.
Semi-dominance and partial dominance are other terms for incomplete dominance.
Genes with the alleles IA, IB, and I are responsible for expression of A, B, and O blood types shows multiple alleles.
A red flower and a white flower produce an offspring with equal proportions of red and white coloration shows codominance.
Thus, a pink roses are formed when red roses are mated with white roses shows incomplete dominance.
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How many atoms of Br are there?How many atoms of Br are there?
Answers
Answer:
8
Explanation:
There are 8 atoms of Br because there are two molecules of 4 atoms of Br. 4 x 2 = 8.
Answer: 1 mol Br contains 6.022×1023Br atoms;its mass is 79.90 g.
Explanation:
: I mole or bromine refers to 6×10^23 molecules of bromine. But 1 molecule of bromine has 2 atoms. Hence the atom count will be exactly twice.
Can somebody help me with this, please? Please Asap
Answers
Answer:
im not sure what exactly you want? if its answering the questions then search up each one and rephrase the answers you get, for instance for mitochondria is the powerhouse of the cell. just write something simple thats what i did when i had to do something like this it took only a couple of minutes
Explanation:
The Organelles help the cell to function efficiently.
What are the organelles in the cell?I can see that your question has to do with the organelles in the cell but I don't quite get the analogies that you intend to use. However, I would explain the organelles one after the other.
Endoplasmic reticulum: The endoplasmic reticulum (ER) is a network of membranous tubes and sacs within the cytoplasm of eukaryotic cells. It serves as a transport system for proteins and lipids, as well as a site for folding and modification of newly synthesized proteins.
Ribosomes: Ribosomes are complex molecular machines that are found in the cytoplasm of all living cells. They are responsible for synthesizing proteins from amino acids, which are the building blocks of proteins.
Mitochondria: These are organelles found in the cytoplasm of eukaryotic cells. They are often referred to as the "powerhouses" of the cell because they are responsible for producing most of the cell's energy in the form of ATP (adenosine triphosphate).
Vacuole: Vacuoles are membrane-bound organelles found in eukaryotic cells. They are large, fluid-filled compartments that serve several important functions within the cell, including storage of nutrients and waste, regulation of the cell's water balance, and maintenance of cell shape.
Cytoplasm: Cytoplasm is the gel-like substance that fills the interior of eukaryotic cells, excluding the nucleus. It is a complex mixture of water, ions, organic molecules, and a variety of cellular structures, including organelles such as mitochondria, ribosomes, endoplasmic reticulum, and lysosomes.
Lysosomes :Lysosomes are membrane-bound organelles found in eukaryotic cells. They are referred to as the "garbage trucks" of the cell because they are responsible for breaking down and recycling cellular waste and unwanted material.
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atoms and molecules are made up of
Answers
Les atomes sont composés de protons, électrons et neutrons.
A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight. As each paper clip was added, the plane was tested to determine how far it would fly.
What was the dependent (outcome) variable from this experiment?
The paper airplane design.
The number of paperclips.
The type of paper.
The distance the plane flies.
Answers
Answer:
The distance the plane flies.
Explanation:
This is the dependent (outcome) variable because it is changing depending on the number of paper clips that are added to the plane.
Answer:
The distance the plane flies.
Explanation:
How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answers
Answer:
39
Explanation:
Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.
———————————
(1/12)th Mass of one C12 atom
What is the main way viruses cause disease in the body
A. By feeding directly on your body parts
B. By using your body's cells to make new viruses
C. By absorbing nutrients from your bloodstream
D. By breaking down your body's cells for nutrients
Answers
Answer:
the answer is B
Explanation:
this is because viruses need to enter a host cell to start reproduce. they usually use your cell to create "virus making factories".
hope it helps
no problems
HELP WILL GIVE BRAINLIEST
Which of the following regions does not experience seasons: Tropic of Cancer, Equator, or Artic?
Write an explanation below using observations from the simulator found at the following link, to justify your answer.
https://www.khanacademy.org/science/cosmology-and-astronomy/earth-history-topic/earth-title-topic/pi/season-simulator
Answers
Answer:
Equator and Arctic because equator is too hot and arctic is too cold. In equator the rays of the sun fall directly all over the year and this is why the [people living there experience a harsh hot weather and high temperatures. On the other hand people living in the Arctic region experience extreme cold because very little sunlight reaches there. Temperatures are freezing cold all over the year.
plz mark me as brainliest.
Answer:
The arctic does not suffer any seasons as it is furthest from the equator and therefore is covered in ice snow and rarely sees sunlight. Therefore the arctic does not have summer autumn or spring. The arctic is so cold that not many trees can survive and the ones that do are usually chopped down to build houses for the people who live there. The arctic is home to one of the worlds largest seed banks that is there in case of a really bad emergency where the farmers crops in another country are not growing.
Explanation:
What is an ellipse please help)
Answers
In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. As such, it generalizes a circle, which is the special type of ellipse in which the two focal points are the same.
Maybe they might use that math thing for Science.
I need help asap pleasee
Answers
Sam wants to conduct an investigation of the velocity of a golf ball when hit off of the tee using the scientific method. Review the procedural steps that Sam plans to follow during his investigation.
Collect data from a sample of ten golf balls hit off of the same tee by the same golfer.
Hypothesize that the golf ball will reach a velocity of 5 feet per second each time the ball is hit from the tee by the same golfer.
Observe the golf ball as it is hit off of the tee.
Analyze data using a table of data and graph of the data.
Communicate results based on the sample data collected.
Which of the following options represents the order of Sam’s procedural steps according to the scientific method?
Sam should plan to hypothesize about the velocity of the golf ball, observe the golf ball, collect data from a sample of golf balls, communicate the results based on collected data, and analyze the data.
Sam’s plan of procedural steps is correct.
Sam should plan to observe the golf ball, hypothesize about the velocity of the golf ball, collect data from a sample of golf balls, analyze the data, and communicate the results based on collected data.
Sam should plan to observe the golf ball, collect data from a sample of golf balls, analyze the data, hypothesize the golf ball’s velocity, and communicate the results based on collected data.
Answers
Answer:
Sam’s plan of procedural steps is correct.
Explanation:
How can chemical energy be converted into mechanical energy?
A. turning on a flashlight
B. sharpening a pencil with an electric pencil sharpener
C. heating up bread in a toaster
D. eating breakfast and then going for a run
Answers
eating breakfast and then going for a run
Answer: D. Eating breakfast and then going for a run.
Explanation:
Eating breakfast is a chemical change and running is a mechanical change.
How does an atom change if all of its electrons are removed?
p.s. I'll mark the first answer the brainliest if it is correct! ;)
a. The atom’s volume increases.
b. The atom’s mass increases.
c. The atom becomes positively charged.
d. The atom becomes negatively charged.
Answers
c. The atom becomes positively charged
if the electrons are removed it means theres no longer a negative charge to balance the positive charge of the protons in the atom
Hey there! so I have this question in chemistry where they have shown a reaction with Ammonia acid and HCL, so the question to explain the kinetic particle theory.
The experiment, I'm in a hurry so pls be fast! Thanks a lot!!!
Answers
What the I haven't even learned this yet
Fill in the blanks:
An ___________ measures wind speed and a _________ shows wind direction.
A.weather balloon; electroscope
B.anemometer; wind vane
C.flask; beaker
D.oscilloscope; seismograph
It's science btw
Answers
Answer:
A.weather balloon; electroscope
What group does this element belong to?
Answers
A brief summary of Cytokinesis? Its for science plz help fast!
Answers
Answer:
Cytokinesis is the process by which one cell physically separates into two daughter cells at the end of each division cycle. In metazoan cells, the division plane, termed the cell equator, is determined by microtubules of the anaphase spindle.
Explanation: