which of the following is an example of physical change?
A. crushing a soda can
B. copper tarnishing
C. baking a cake
D. mixing baking soda and vinegar
Crushing a soda can represents a physical change because the change is only in the shape, and the material of the can does not undergo a chemical transformation.
The student's question pertains to distinguishing between physical changes and chemical changes. In the list provided, option A, crushing a soda can, is an example of a physical change. This is because crushing the can changes its shape, but the material it is made of, typically aluminum, is not chemically altered in the process. There is no formation of new substances; the change is merely physical.
Let's review the other options briefly: B. Copper tarnishing is a chemical change because it involves the reaction of copper with sulfur compounds to form a new substance, copper sulfide. C. Baking a cake is a chemical change because new substances are formed as a result of the heat causing chemical reactions between the ingredients. D. Mixing baking soda and vinegar is also a chemical change because it results in the formation of carbon dioxide gas, water, and other substances.
What is the correct classification of a mixture in which both a solid and a liquid are visible? a homogeneous mixture and a solution a homogeneous mixture and a suspension a heterogeneous mixture and a solution a heterogeneous mixture and a suspension
Answer:
I think its c
Explanation:
The correct classification for a mixture with visible solid and liquid that can settle is a heterogeneous mixture and a suspension, like mud in water.
The correct classification of a mixture in which both a solid and a liquid are visible, and in which the particles can settle out, is a heterogeneous mixture and a suspension.
This is because heterogeneous mixtures consist of two or more substances that are not uniformly distributed, and in a suspension, the solid particles are large enough to eventually settle out from the liquid.
An example of such a mixture would be mud mixed with water. This is contrasted with a homogeneous mixture, or a solution, such as salt dissolved in water, where the different substances cannot be visually distinguished even under a microscope.
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The table below shows the age of fossils found in four separate layers of an undisturbed rock:
Fossils In Rock Layers
Layer Fossil in Layer Age of Fossil (million years)
A W 550
B X 240
C Y 680
D Z 450
Which is the topmost layer of the rock?
Layer A
Layer B
Layer C
Layer D
Answer:
heyo!
the answer is b
Explanation:
Answer:
Answer:
Option (4)
Explanation:
Index fossils are defined as those fossils that existed for a shorter period of time and are widely distributed on earth. They are abundant. These index fossils because of their short vertical range, are helpful in the determination of the age of the rocks and also to identify the major events that have taken place in the past. For example, the ammonites.
In the given data, the layers comprising of fossils namely A, B, C, D, E and F are provided, where the youngest layer is layer 1 and the oldest layer is layer 6.
From this set of fossils, we can mark that the index fossil within these rock formations is the fossil E. It is because E is the only fossil that is found in the layer 2 which is abundant and is found in a rock layer that belongs to a particular age.
All other fossils i.e. fossils A, B, C, and D are found in two of the layers, which does not satisfy the condition of an index fossil. They are found in different rock layers belonging to a different time.
Hence, the correct answer is option (4) i.e. fossil E.
Which of the following causes clouds to form? (1 point)
A. Air cooling to its dew point
B. Water vapor condensing as it rises into cooler air
C. Air pressure rising above normal
D. Air pressure below normal
Answer:
b
Explanation:
a pure substance that contains only one atom is called a(n) _____.
A: Element
B: Compound
C: Mixture
D: Precipitate
Answer:
element
Explanation:
-compounds have two or more types of atom
-mixture can be easily separated without the use of a chemical reaction
-i dont know what a precipitate is
Answer:
element
Explanation:
science question down below
when 1 carbon atom combines with 2 oxygen atoms, the resulting substance is called a(n) A.) Element. B.) Compound. C.) Isotope. D.) Ion.
The correct answer to the question is option B. Compound
An element is a pure substance that can not be broken down into simpler substance.
A compound is a substance consisting of two or more elements chemically combined together.
Isotopes are atoms having the same atomic number but different mass number due to the difference in the neutron number of the atoms involved.
An ion is an atom or group of atoms which possess an electric charge.
The combination of carbon and oxygen will produce a compound. This is true because the carbon and oxygen will be chemically combined together as a new bond will be formed between them given rise to a new substance.
C + O₂ —> CO₂Learn more: https://brainly.com/question/15647245
You are outside on a clear night. You see the moon, but the face of the moon is all dark; no reflected light seen. This is most likely a _________ moon.
what is a frame reference
Answer:
i think a measurements used when inertia is present
Explanation:
How many neutrons does sodium have? What is the chemical symbol for sodium? How many protons does sodium have? How many electrons does it have in the n = 2 orbit?
Final answer:
Sodium (Na) has 11 protons, 12 neutrons, and 11 electrons. It has 8 electrons in the n = 2 energy level. When it becomes a cation (Na+), it loses one electron and gains a +1 charge.
Explanation:
Sodium, with the chemical symbol Na, is an element represented in standard notation as 22Na. This notation helps us understand that sodium has 11 protons in its nucleus. The number of neutrons can be calculated by subtracting the atomic number (number of protons) from the atomic mass number, leading to the conclusion that sodium has 12 neutrons. Considering that a neutral sodium atom has an equal number of protons and electrons, it also has 11 electrons. In the n = 2 energy level, or the second shell, sodium has 8 electrons, filling the 2s and three 2p orbitals.
When sodium becomes a cation (Na+), it loses one electron, resulting in 10 electrons remaining. This cation has a +1 overall charge and is isoelectronic with neon, meaning they share the same electron configuration. A review question related to this concept asks which atom the sodium ion is isoelectronic with, and the answer is a neutral neon atom.
Which structure is found in a single-celled organism? A. internal organs B. legs C. outer covering D. large brain
a scientist has 0.46 mL of a solution. How would she convert this volume to microliters?
what is nuclear fission
What is the true about scientific idea
Which of the following are advantages of the SI system?
(Select all that apply).
A) It is easy to change from one unit to another.
B) It allows scientists to compare experimental results.
C) All its units are based on the number 100.
D) It is based on inches and pounds.
Answer:
it is easy to change...
it allows scientists...
Explanation:
Which of these groups includes organisms that are MOST closely related?
A) class
B) family
C) genus
D) species
Answer:
The Correct Answer is D
Explanation:
A biological species is a collection of organisms that can generate with one another in strength and create resourceful generation. The title species can also be described as the most fundamental division in the order of taxonomy.The species is the significant classification of taxonomic analysis, standing under a genus or subgenus.is F2O a oxigone flouride or flourin oxide?
can Someone please do this for me please please
boiling point density conductivity color These may all be classified as the ______________ of a substance.
Boiling point density conductivity color These may all be classified as the. of a substance. - 6357722.
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is true about how hydrogen and oxygen can combine to form molecules?
When considering different hypotheses, usually the ____ one which can account for the ____ is the correct one. |
| \/
\/ newest
planetary system simplest
information most complicated
orbitals longest
theory
I know its not chemistry but theres no science option
Answer:
Simplest, Information.
Explanation:
when the following two solutions are mixed: K2CO3 (aq) + Fe (NO3) 3 (aq) the
How many grams of water can be produced when 11.7 moles of ethane (C2H6) react with excess oxygen gas? Unbalanced equation: C2H6 + O2 → CO2 + H2O
In which picture(s) will you find a state of matter that has particles who have more energy than liquid water?
This answer is B and C.
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How many valence electrons does Iron (Fe) have? How do you know?
Iron (Fe) has 8 valence electrons, as determined by its position in Group 8 (VIII) of the periodic table, which is a characteristic shared by all elements in this group.
Iron (Fe) has 8 valence electrons.
To determine the number of valence electrons for an element, you can use the periodic table. In the case of iron, it is located in Group 8 (VIII) of the periodic table, also known as Group 8 or Group VIII. The group number indicates the number of valence electrons for elements in that group.
Iron, with its atomic number 26, falls within this group. Elements in Group 8 have 8 valence electrons, as this is the most stable configuration for the outermost electron shell. In the case of iron, it has the electron configuration of 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶. The 3d subshell contains 6 electrons, and the 4s subshell contains 2 electrons. The sum of these two subshells gives a total of 8 valence electrons.
Valence electrons are important in understanding an element's chemical behavior, as they are involved in chemical bonding and reactions. In the case of iron, its 8 valence electrons play a crucial role in its ability to form chemical bonds and participate in various chemical reactions.
For more such information on: valence electrons
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What type of energy is present in the batteries of a flashlight? Mechanical energy Electrical energy Chemical energy Radiant energy
Marble statues and buildings weather more quickly today than when first constructed. Explain how the pH of water plays a role in this process.
Please answer it in at least a few sentences!! Thank you!
Which units are used to measure force? newtons feet miles grams
The unit used to measure force is Newton. Therefore, option (A) is correct.
What is the International System of Units?The S.I. units can be defined as the modern version of the metric system and the globally used system of measurement for the different quantities which is established and managed by the Conference on Weights and Measures.
S.I. units system can be demonstrated as a system of measurement used in most of the countries in the world employed in mathematics, technology, industry, science, and commerce.
The S.I. possesses a coherent system of units initiated with seven base units. The second (s) is the unit of time), mole (mol) is the amount of substance, Kilogram (kg) is the unit of mass, meter (m) is length), kelvin (K) is the unit of temperature, ampere (A) is the unit of electric current, and candela (cd) is the luminous intensity.
The force is defined as the mass times of acceleration the unit of mass is Kg and acceleration is m/s². So the unit of the force is Kg.m/s² but we use Newton to measure the force.
Therefore, force is measured in the units of Newton.
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Compare and contrast of cotton balls and pine cone
how do you know if a reaction is endothermic
please give a long and detailed answer i will mark brainliest and give 40 points