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Scientific Models and Measurements: Mastery Test

What type of scientific model does the flow chart represent?

Make

observations

Ask

questions

Construct a

hypothesis.

Repeat the

process.

Test the hypothesis with

an Investigation

Analyze the data.

Explain the

results

The hypothesis

Is true.

The hypothesis

Is not true.

Communicate

the results.

Answers

Answer 1

Answer:

what is scientific model

Explanation:


Related Questions

How much water (H2O ) would form if 4.04 g of hydrogen (H2) reacted with 31.98 g of oxygen (O2 )?
(2H2 + O2 2H2O)

Answers

Answer:

Mass = 36 g

Explanation:

Given data:

Mass of water formed = ?

Mass of hydrogen = 4.04 g

Mass of oxygen = 31.98 g

Solution:

Chemical equation:

2H₂ + O₂   →   2H₂O

Number of moles of hydrogen:

Number of moles = mass/molar mass

Number of moles = 4.04 g/ 2 g/mol

Number of moles = 2.02 mol

Number of moles of oxygen:

Number of moles = mass/molar mass

Number of moles = 31.98 g/ 32 g/mol

Number of moles = 1.0 mol

Now we will compare the moles of water with hydrogen and oxygen.

                O₂         :         H₂O

                 1           :           2

                H₂         :         H₂O

                 2          :          2

               2.02       :      2.02

Number of moles of water formed by oxygen are less thus oxygen will limiting reactant.

Mass of water:

Mass = number of moles × molar mass

Mass = 2 mol × 18 g/mol

Mass = 36 g

what are the 3 types of bonds in chemistry? and how can you tell when a chemical has that bond?

Answers

Answer:

Ionic bonding, Covalent bonding, Metallic bonding.

» My memory

A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds. » Wikipedia

Why do electronegativity charts often give no values to the group 18 elements?

Answers

Answer:

Because they have complete electronic configuration

Explanation:

Group 18 elements are known as the noble or inert gases. The elements in this group are non-reactive because they have complete electronic shell configuration.

Electronegativity is the tendency of an atom to attract electrons. The reason why atoms attracts electrons is to have a stable configuration like those of the noble gases. Since the noble gases do not require any extra-electrons to attain stability, they have 0 electronegative values.

What is the chemical equation( formula ) of the reaction of photosynthesis

Answers

Answer:

The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2.

Explanation:

This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.

true or false: ur hearts a muscle​

Answers

Answer: True

Explanation:


The periodic table organizes elements according to INCREASING
A)
atomic mass.
B)
energy level
C)
atomic number
D)
valence number

Answers

Answer:

C)

atomic number

Explanation:

C)

atomic number is also the number of protons an atom has and this number will never change unlike number of neutrons or electrons.

The answer should be c

Objects with more (less or more) molecules have
heat energy than objects with (greater or fewer)
molecules? fill in the blanks

Answers

More heat energy; fewer molecules
Because the more molecules the more heat is produced.

1 of 101 of 10 Items
00:04 / 30:00
Assessment started: Unit 3 Exam-Retest.
Item 1
If pressure is constant, how is the volume of a gas related to its temperature?

Answers

Answer:

A

Explanation:

Trust me i just did this :)

Barry purchased a whole life insurance policy. Which of the following choices is true?

Answers

Answer:

where the following choices??

Explanation:

The most stable group of elements on the periodic table is the?
A) halogens
B) noble gases
C) alkali earth metals
D) alkaline earth metals

Answers

Answer:

Noble Gases B

Explanation:

The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore, they rarely react with other elements since they are already stable.

B) Noble gases
Most stable because they have the maximum number of valence electrons their outer shell can hold

How does the suns energy contribute to the movement of water in the water cycle?

Answers

Answer:Evaporation

Explanation:

The suns heat speeds the movement of water molecules, until the molecules move fast enough that they jolt out the surface of the water individually. Overtime the water gradually evaporates into water vapor.

Is it possible to view atoms?
Select one:
a. Yes, you can view atoms with the naked eye.
b. Yes, you can view atoms with a light microscope.
c. Yes, you can view atoms with a scanning tunneling microscope.
d. No, it is not possible to view atoms with any kind of microscope.

Answers

Answer:

I think it

C

because you cant view them with a naked eye

The answer is C
You can only see them with a scanning tunneling microscope

In your OWN WORDS, describe what the “Law of Conservation of Energy” is.

Answers

Energy cannot be destroyed or created, but energy could be transformed or transferred. For example a skiier skiing from the mouth can have potential energy transferred into kinetic energy.

please answer this its really fast

In the following balanced equation what is a correct mol ratio? *

1 mol CH4 / 2 mol CO2
1 mol O2 / 1 mol H2O
2 mol CO2 / 3 mol O2
4 mol H2O / 3 mol CH4

Answers

Answer:

ugly

Explanation:

when an atom loses electrons, what does it become?

Answers

It becomes a cation. Cations lose electrons to become positive charged.

A laboratory hydrogen generator collects the gas produced by bubbling it through water. The total pressure of the gas collected is 751 mmHg. The temperature is 34 °C, at which water vapor pressure is 40.0 mmHg. Calculate the partial pressure of the hydrogen.

Answers

Answer:

[tex]711\ \text{mmHg}[/tex]

Explanation:

[tex]P_{total}[/tex] = Total pressure = 751 mmHg

[tex]P_{water}[/tex] = Vapor pressure = 40 mmHg

[tex]P_{gas}[/tex] = Pressure of gas

The total pressure in a system is given by Dalton's law

[tex]P_{total}=P_{gas}+P_{water}\\\Rightarrow P_{gas}=P_{total}-P_{water}\\\Rightarrow P_{gas}=751-40\\\Rightarrow P_{gas}=711\ \text{mmHg}[/tex]

The partial pressure of the hydrogen is [tex]711\ \text{mmHg}[/tex]

Compare the viscosity property of solid and liquid. ​

Answers

Answer

There is nothing like viscosity in solid because most of the solids usually have a rigid body. This is due to strong intermolecular forces. And it is due to this strong force between the molecules that they are unable to move and they remain fixed at their position. Some solids such as graphite which have layered structure, don't possess the property of viscosity, because of the strong force between the layers.

Explanation:

Viscosity is the property of a fluid that opposes the relative motion between two surfaces of the fluid that are moving at different velocities. In simple terms, viscosity means friction between the molecules of fluid.

FOR EXAMPLE

water is "thin", having a low viscosity, while vegetable oil is "thick" having a high viscosity

Put the Levels of Organization in order from the simplest (smallest) to the most complex (largest). human, brain, nervous system, nervous tissue, nerve cell

Answers

Answer:

nerve cell, nervous tissue, brain, nervous system, human.

Explanation:

The order is from the simplest to the most complex, within the simplest would be the cellular structure, then the organs come, then systems (a set of organs in multidirectional operation among them) and finally the human, which is a set of systems .

Fluorine (F) and bromine (Br) are in the same group on the periodic table. How do atoms of these elements compare when they form bonds?

Both a fluorine atom and a bromine atom lose one electron, and both atoms become stable.
A fluorine atom becomes stable by losing one electron, but a bromine atom cannot become stable by losing only one electron.
Both a fluorine atom and a bromine atom gain one electron, and both atoms become stable.
A fluorine atom becomes stable by gaining one electron, but a bromine atom cannot become stable by gaining only one electron.

Answers

Answer:

Both a fluorine atom and a bromine atom gain one electron, and both atoms become stable.

Explanation:

The two elements compare when they form bonds in that when both a fluorine atom and a bromine atom gain one electron, they both become stable.

Fluorine and bromine are elements called halogens. They both belong to group 7 on the periodic table. When they gain an electron each, they become isoelectronic with a corresponding noble gas. This gives their atom special stability.

Answer:

3) Both a fluorine atom and a bromine atom gain one electron, and both atoms become stable

Explanation:i got it right on the quiz

hope this helps

Unlike particles in a liquid or a gas, the particles in a typical solid are arranged
A. separately from one another in constantly changing positions
B. in close contact with one another and in constantly changing positions
C. randomly in fixed positions
D. in orderly patterns and fixed positions

Answers

Answer:

D. In orderly patterns and fized positions

Explanation:

As you were climbing a a mountain, you noticed that rocks were crumbling below your feet and moving down the mountain. What two processes did you observe?

Answers

Answer:

Weathering and erosion

Explanation:

Weathering can be explained as the breaking down of rocks/minerals on the surface of the Earth as a result of contact with biological organism, water, air and other factors

. There are 3 common types of weathering which are;

1) physical weathering

2) biological weathering

3) chemical weathering

Erosion can be regarded as a geological process, whereby earthen material are been transported away by natural forces, these forces could be wind as well as water.

Therefore, as you were climbing a a mountain, you noticed that rocks were crumbling below your feet and moving down the mountain. What is observed are weathering and erosion processes.

After the weakening and broken up of the rock by weathering then erosion transport the bit of the rock down the mountain as you are climbing, which means the "weathering process" breakdown and the "erosion process" involves the transport or movement of the bit of the rocks

what do you conclude from the bar graph​

Answers

Answer:

A bar graph shows the relationship between different values of data. Each data value is represented by a column in the graph.

Help please !
A
B
C
D

Answers

Answer:

the answer is letter B. the entropy

Answer:B (the entropy of the gas will increase, and it will spread out to fill both containers) is the correct answer

someone help me please i’ll give brainly

Answers

Answer:

solid

liquid

Gas

plasma

Highest to lowest energy : plasma, gas, liquids, solids

:answer question number 8

Answers

Answer:

Weight

Explanation:

Weight changes because the moon's gravity is different from the Earth's. Mass is always the same. Volume remains the same. Density also remains the same. Hope my answer is correct! If there is a lot of explanation, you can give a brainliest to my answer.

What type of reaction would NI3+ ->lead to?

Answers

Answer:

Reduction potential (Eo) is defined as a tendency of a chemical species to be reduced by gaining an electron and is defined with electrochemical reference of hydrogen, which is globally given the reduction potential of zero [24].

Explanation:

i need help people :0

Answers

install a ceiling fan , and avoid wasting water.

Use the drop-down menus to identify the order of these images for the formation of our solar system.

Answers

Answer:

Explanation:

Sodium metal reacts violently with water and chlorine is a toxic gas, yet we eat sodium chloride. Why is this possible? Select one: a. The properties of compounds are different from the properties of the elements that form the compounds.
b. The properties of compounds are identical to the properties of the elements that form the compounds, and we should not eat sodium chloride because it is toxic.
c. The physical properties of compounds are different from the physical properties of the elements that form the compounds, but the chemical properties of the elements and compound are the same.
d. The chemical properties of compounds are different from the chemical properties of the elements that form the compounds, but the physical properties of the elements and compound are the same.

Answers

Answer:

The properties of compounds are different from the properties of the elements that form the compounds.

Explanation:

When elements form compounds, their properties are significantly modified. The physical and chemical properties of compounds and that of the elements that compose them are significantly different.

The introduction of chemical bonds between different atoms in compounds make the compounds to differ from elements where the atoms are bonded to atoms of the same element.

The object will have a minimum gravitational potential energy at point
A)A B)B C)C D)D

Answers

Answer: Decrease

Explanation: The downward slope causes the momentum to decrease in speed rather than increase from an higher point.

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A and b are similar shapes the area of shap a is 200cm There were 130 faculty at a conference. If there were 18 more women than men attending, how many of each gender attended the conference? Locomotor skills are complex movements that must only be done by a trained athlete. A. True B. False Yesterday, the temperature at noon was 10.4F. By midnight, the temperature has decreased by 16.7 degrees. What was the temperature at midnight?I'm in 7th grade by the way The shooting(blank) should describe a daily plan of the shoot and should include everything from the crew to wrap-up. Which two steps are most necessary to make an inference?anticipating opposing viewpointsresearching unfamiliar vocabularylocating key details in the textconnecting details to your outside knowledgediscussing the text with a peer I will give brainlest for the right answer. Please don't just make up a random thing. PLEASE!Which expression is equivalent to 30(1/2x-2)+40(3/4y-4)?45xy-22015x-30y-22015x+30y-22015x+30y-64 The memory of facts and experiences that people consciously know and can easily recite is known asmemory What is most likely the author's reason for spelling sivilized incorrectly?O A. He is distracting the reader from thinking about the ways Huck is getting civilized.O B. He is having Huck do it because it bothers Widow Douglas.O C. He wants to demonstrate that Huck is uneducated.D. He either made a typo or it was spelled differently at the time the book was written. There was a ironic tone to the message as if the speaker found it amusing and Jonas had a smiled a little though he knew what a grim statement it has been will mark brainliest I need the answer quickly If mFBE=(4x+2) and mEBD=(5x13), then mFBA= I really need help on all of them, I will give out brainliest to one answer and ten points to both Create a proportion using the form = to represent the following word problem.15 is 1 [tex]\frac{1}{2}[/tex] % of what number? Find the number of groups and the number left over. 24 - 5 = with left over 24-5= with left over (Type whole numbers.) 8 1/3 % of 64 mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm Text is Advice To the Newly Married Lady.What view or belief about women does the author convey in this sentence: Your house is your only refuge, your husband your only companion? (Paragraph 3)A. Women had incredible freedom and rights.B.Women could only be wives and manage homes.C.If things were bad at home, a woman had no other options.D.If a woman wanted a good life, she had to buy a home.What is the answer? La circunferencia es tangente a la recta 3x - 4y = 34 en el punto (10, -1) Y tambin es tangente a la recta 4x + 3y = 12 en el punto (3, O). Hallar la ecuacin de la circnferencia. both fish seen here are african zebra cichlids they have two color alleles.