Answer:
Concentration
Explanation:
When you add a chemical to itself it becomes more concentrated making it more effective and fast
I just need answers please!!
1. Groups of organs work together to form _________________.
2.What is the lowest level of organization in a multicellular organism?
4.Which body systems work with the digestive system to get nutrients to the rest of the body?
The number that represents a neutral pH is____?
I NEED HELP
Answer:
7 represents a neutral pH in the pH scale
Explanation:
pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater then 7 indicates a base.
NEED HELP ASAP I BOUT TO LEAVE SCHOOL???????
Please help, this is stem class!! Due in 30 minutes!!
Answer:error __________________
Explanation:error ________________
5 ZnSO4
a. Count the number of Sulfur atoms =
b. How many total atoms are given in the compound =
According to the chemical formula given there are 5 sulfur atoms and 30 total atoms in the given compound of zinc sulfate.
What is chemical formula?Chemical formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols of elements. It also makes use of brackets and subscripts.
Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form is called empirical formula.
It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.
There are four types of chemical formula:
1)empirical formula
2) structural formula
3)condensed formula
4)molecular formula
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How might the digestive system and the circulatory system need to work together?
Use the relative humidity table and the data to answer the question.
On March 23, the psychrometer reading was:
dry-bulb thermometer: 16°C
wet-bulb thermometer: 7°C
What is the relative humidity for March 23?
A. 89%
B. 44%
C. 42%
D. 19%
Difference between dry bulb
and wet bulb temperatures
Relative humidity
None 100%
0.5° 96%
1.0° 93%
1.5° 89%
9.0° 44%
9.5° 42%
14.5° 19%
15.0° 17%
18.0° 5%
Answer:
Explanation:
B
PLEASE USE YOUR OWN WORDS!! Each question needs to have three sentences!
Best answer will get brainliest!
1. Explain how our body systems work together to get oxygen into and around our body.
2. How might the digestive system and the circulatory system need to work together?
3. What system(s) might not function normally if you have a cold?
The impacts to humans, nature and the planet caused by fossil fuels. (needs to be a paragraph)
Answer:
fossil fuels are not good for us. there not good for the earth! it makes large amounts of carbon dioxide when ever it is burned. it is cuasing global warming! we burn it for energy, we need a difrent energy sorce, that is cleaner and better!
i hope this is good enough !<3
A scientist is exploring a prediction. Her prediction states: plants take in carbon dioxide from the air, and then release the same amount of carbon dioxide back into the air. She performs an experiment to test this prediction. After doing so, she realizes the prediction is incorrect—plants release less carbon dioxide into the air than they take in. Was the failed experiment useful in advancing science? Why or why not?
HELP PLEASE
USE YOUR OWN WORDS. Each question must have a three sentence long answer!
1. If there is not one scientific method, then what do all scientists have in common?
2. How is a theory similar to and different from a law?
3. What is the difference between data and evidence?
4. Why do scientists use models, and why do all models have limitations?
5. What makes a good scientific question?ANSWER Why do scientific ideas sometimes change?
Answer:
1. We often think of scientists following the scientific method and conducting laboratory experiences. What all scientists have in common is that they work to identify patterns in the natural world and then use evidence to explain how and why those patterns exist.
2. Like theories, scientific laws describe phenomena that the scientific community has found to be provably true. Generally, laws describe what will happen in a given situation as demonstrable by a mathematical equation, where as theories describe how the phenomenon happens.
3. Evidence is a body of facts and information showing whether a hypothesis is true or untrue. Data forms the basis for evidence.
Plz help 30 POINTS!!
How can a chemical reaction be sped up?Select from the drop-down menu to correctly complete the statement.
Pack in more of the reactant to increase the _______
Concentration
Surface Area
Temperature
Answer:
A) Concentration
Explanation:
When you add a chemical to itself it becomes more concentrated making it more powerful and faster
What is the definition of a chemical change that when two or more substances (molecules) combine to form a new substance (or new molecules).
Answer:
synthesis reaction
Explanation:
Choose all of the answers that describe beneficial microorganisms.
Microorganisms are used to produce food
Microorganisms aid in the digestion of food.
Microorganisms cause diseases
Microorganisms cause food to spoil
Microorganisms help to make the soil more fertile
Microorganisms cause cuts to get infected
Answer:
1, 4,3,2
Explanation:
is (H2O) water a compound of a element? is Ozone a compound of a element? explain. please help me!!
Answer:
H20 is a compound and ozone is a compound to because the got more then u elements in it
Explanation:
Answer:
Water is a compound because it is composed from two hydrogen atom and one oxygen atom. Water is considered a compound because it is made up of more than one element. By definition, a compound is composed of multiple atoms from different elements. Water has 2 hydrogens and 1 oxygen.
A compound is a combination of more than one element.
A molecule is the smallest particle of an element or a compound.
Oxygen(O) is an element.
O2 - is a molecule which is formed by making a double bond with another Oxygen.
O3 - is a molecule as well, which comprises of three oxygens with two single bonds and one double bond. The resonance structure has a partial positive charge on the central Oxygen and partial negative charges on the end oxygens.
Explanation:
"In summary, the modern definition of a compound is a type of molecule consisting of at least two different types of atoms. By this definition, water is both a molecule and a compound. Oxygen gas (O2) and ozone (O3), for example, are substances that are molecules but not compounds."
Select the correct image.
Which body part is vestigial in humans?
Answer:
should be appendix, I can't see any image tho.
Answer: Appendix
Explanation: I dont see an image though
How does magnesium hydroxide provide relief for indigestion?
Magnesium hydroxide is an acid that neutralizes HCl in the stomach.
Magnesium hydroxide produces magnesium chloride salt, which neutralizes HCl.
Magnesium hydroxide reacts with HCl to produce a solution that is neutral.
Magnesium hydroxide is an acid that digests food in the stomach.
Magnesium hydroxide provides relief for indigestion by reacting with HCl to produce a solution that is neutral.
Magnesium hydroxide in the stomach acts as an antacid (i.e substance that neutralizes stomach acidity). They are utilized as laxatives for the sole purpose of treating constipation and increasing bowel movements.
When present in the stomach, magnesium hydroxide reacts with the HCl produced by the parietal cells that are present in the gastric glands to neutralize these acids and produce a solution that is neutral.
why does the amount of water pressure determine the size of bubbles in the water
Answer:
Water vapor pressure is a function of temperature (and pressure as well). It increases with the temperature. When vapor is produced on the heat surface, bubble forms. The size of the bubble is determined by the buoyancy and the water pressure at the location.
Write TWO examples of Newton's third law in "The Martian."
For every action force, there is an equal and opposite reaction force.
Answer:
Newton's Third Law is showed when they use the air lock to slow down the velocity. The action is the air shooting out from the ship and the reaction is the velocity slowing down. Another action would be the bomb making the whole in the airlock door which will have a reaction of the ship slowing down
Explanation:
Newton's Third Law is showed when they use the air lock to slow down the velocity. The action is the air shooting out from the ship and the reaction is the velocity slowing down.
What is Newton's Third law?Newton's Third Law is defined as when two bodies come into contact, they exert forces on one another that are both equal in strength and directed in opposing directions.
Ball bouncing: When a ball strikes the ground, it exerts action force on the surface. The ball bounces back as a result of the ground's reaction force. A bird's wings act as an action force, pushing air downward, and act as a reaction force, pushing the bird upward.
Thus, Newton's Third Law is showed when they use the air lock to slow down the velocity. The action is the air shooting out from the ship and the reaction is the velocity slowing down.
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Please can someone answer these two boxes.
(subject is science)
Answer:
d
Explanation:
im sorry i need the points :[
when you lift a book from the ground what type of energy is that ? Write answer in your own words but it is fine to do reasearch i will check to see if u plagerized I WILL REPORT YOU! NOOO LINKS thx UwU
Answer:
The book gets potential energy as it goes higher and if you release it while its falling its potential energy goes away as it gets kinetic energy but when it hits the floor again it gets thermal energy
pls tell me if im wrong
Answer:
simply put it is a pulling force because you are directing your mass and energy into a concentrated movement that requires that energy and are exerting it to pull the object (aka the book)
Explanation:
Chemical Reactions:
Question 5
A substance with two oxygen atoms is combined with a substance with one oxygen atom to form one product. What is true of the product?
Select one:
There will be no oxygen in the product.
Some of the oxygen will evaporate into the air.
There will be three oxygen atoms in the product.
There will be six oxygen atoms in the product.
Answer:
i believe its C.
Explanation:
when do the highest tides happen?
(select all that apply.
when the moon is full
When the moon is new
When the moon is in the third quarter
When the moon is in it the first quarter.
When the moon is full, the highest tides happen. Therefore, the first option is correct option.
Tides are the rise and fall of sea levels induced by the moon's and sun's gravitational influences on Earth's oceans. These celestial bodies' gravitational pull causes a tidal bulge on the side of the Earth facing them, as well as a second bulge on the opposite side.
The highest tides, known as spring tides, occur when the moon's and sun's gravitational forces align. This occurs during the full and new moon phases of the moon. During these phases, the sun's and moon's gravitational pulls reinforce each other, resulting in higher high tides and lower low tides.
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Scientists have identified a link in the ice cores between ___________-________ and atmospheric temperatures over thousands of years.
Answer:
Explanation:Ice sheets have one particularly special property. They allow us to go back in time and to sample accumulation, air temperature and air chemistry from another time[1]. Ice core records allow us to generate continuous reconstructions of past climate, going back at least 800,000 years[2]. By looking at past concentrations of greenhouse gasses in layers in ice cores, scientists can calculate how modern amounts of carbon dioxide and methane compare to those of the past, and, essentially, compare past concentrations of greenhouse gasses to temperature.
Ice coring has been around since the 1950s. Ice cores have been drilled in ice sheets worldwide, but notably in Greenland[3] and Antarctica[4, 5]. High rates of snow accumulation provide excellent time resolution, and bubbles in the ice core preserve actual samples of the world’s ancient atmosphere[6]. Through analysis of ice cores, scientists learn about glacial-interglacial cycles, changing atmospheric carbon dioxide levels, and climate stability over the last 10,000 years. Many ice cores have been drilled in Antarctica.
Answer: hey allow us to go back in time and to sample accumulation, air temperature and air chemistry from another time[1]. Ice core records allow us to generate continuous reconstructions of past climate, going back at least 800,000 years[2].
Explanation:
USE YOUR OWN WORDS. Each question must have a three sentence long answer!
1. If there is not one scientific method, then what do all scientists have in common?
2. How is a theory similar to and different from a law?
3. What is the difference between data and evidence?
4. Why do scientists use models, and why do all models have limitations?
5. What makes a good scientific question?ANSWER Why do scientific ideas sometimes change?
Answer:
1. Scientists use experimentation and careful observation to collect evidence to support those explanations. Although there is no single scientific method, all types of scientists use the eight science and engineering practices in different orders and combinations to do their work.
2. In simplest terms, a law predicts what happens while a theory proposes why. A theory will never grow up into a law, though the development of one often triggers progress on the other
3.Data is just data and has no intrinsic meaning on its own. Evidence has to be evidence for or of something; an argument, an opinion, a viewpoint or a hypothesis. The evidence you use depends on your argument.
4.All models have limitations because they are not representative of every possible scenario. They use current knowledge and scientific data, but as those are subject to change, the models based off that knowledge and data are subject to change as well. ... Scientific models are not a replacement for experimentation.
5.What makes a good scientific question is that it can be answered by direct observations or with scientific tools. Examples of questions that are not scientific are based on values or opinions like what people believe is right or wrong, or beautiful or ugly. (to the part that says ANSWER ---->) Scientific ideas change over time as our evidence improves. The more experiments we do and the more data we collect, the better our scientific ideas become. ... When a brand-new idea is suggested, the first step is to collect evidence. But even when that evidence is collected, understanding it can be difficult.
Around 1997 there was an abrupt ______ degree F jump in temperature of coastal water
Answer:
different climates
Explanation:
Why is foam fight chemical or a physical change
Answer:
This CHEMICAL REACTION produces carbon dioxide gas (which form the bubbles) and water. The addition of dish soap is what causes the foam by trapping the tiny carbon dioxide bubbles before they can pop. The reaction is also taking in heat (ENDOTHERMIC), which causes the foam to feel cool to the touch.
Explanation:
How much does the sky weigh?
Answer:
"At eight pounds per gallon, that's another 38,593,169,564 pounds of water in the air. Add it all up, and the total weight of our sky is 12,107,415,382,493,169,564 pounds, more than 12 quintillion pounds"
Explanation:
The total weight of our sky is 12,107,415,382,493,169,564 pounds, more than 12 quintillion pounds. Sea level atmospheric pressure is 15 pounds per square inch, meaning every square inch of our planet’s surface has 15 pounds of air above it. One square inch is roughly one-third to one-half the size of an adult thumb.
That corresponds to 60,217,344,000 pounds of air for every square mile. Earth has a total surface area of 201,061,929 square miles. Do the math. Our atmosphere weighs 12,107,415,343,900,000,000 pounds.
According to meteorologists, water vapor averages 0.04% of the volume of Earth’s atmosphere. That means the sky holds 4,824,146,196 gallons of water.
At eight pounds per gallon, that’s another 38,593,169,564 pounds of water in the air. Add it all up, and the total weight of our sky is 12,107,415,382,493,169,564 pounds, more than 12 quintillion pounds.
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How can a chemical reaction be sped up?Select from the drop-down menu to correctly complete the statement.
Pack in more of the reactant to increase the _______
Concentration
Surface Area
Temperature
Answer:
Concetration
Explanation:
Answer: Temperature
Explanation:
