Answer:
1.- Oldest rock in the Earth
2.- Rocks of the moon
3.- Rocks of the meteorites
Explanation:
1.- In our Earth, there has been different studies that show the age of different layers in our planet by radiation, in this way, we can imagine how has been changing the surface trough this millions of years.
2.- By sonic sounds, the rocks of the moon can be analyze to calculate it relative age, and how this is corresponding to the age of our planet.
3.- Finally, another evidence of our Earth age, is by comparing the mass of different space bodies with our planet.
Hope this info is useful.
Answer:
The study of rocks, especially sedimentary rocks that formed underwater but are no longer underwater, is the primary source of information about the earth's age. The second line of geological evidence that the earth might be very old came from fossils. And finally, examining radioactive elements and estimating the age of rocks using certain rates of radioactive element decay is a third line of geological evidence for the age of the Earth.
Explanation:
How many calories are needed to raise the temperature of 1 gram of water by 10 degrees Celsius? Chemistry again (uhhh).
And I thought I was smart lol.
How do solutions of water, elements, and compounds that can crystallize into a mineral form deep underground?
Yes I do know it is not chemistry...
Many mountains on Earth have been formed by the eruption of __________.
A. earthquakes
B. hurricanes
C. volcanoes
Answer:
It is C. Volcanoes
Explanation:
what are the advantages of electric cars
what affects gravity
methane fraction of each type of atom
one of the tallest dog breeds is the great dane which stands over a meter tall. one of the shortest is the pomeranian which stands about 20 centimeters tall based on what you learned about artificial seletion how were these two breeds developed
When the tallest dog breeds and the shortest dog breeds learned about the artificial selection so the development should be explained below.
What is a selective breeding?It is the process where the human used the animal breeding and the plant breeding so that the phenotypic traits should be developed by selected the animal or plant males.
Also, it se-xually reproduced and contain the offspring together.
In this way it should be explained.
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a electron compared to a proton
consider the car driving around a circular track .Once stated,the driver maintains a speed 0f 45m/h.Compare the driver's velocity with his acceleration in this case.
A.)The car is accelerating because it is changing direction but the velocity is constant.
B.)The car is traveling at a constant rate of speed so it is not accelerating and the velocity does not change
C.)Acceleration is the change in velocity so the car is experiencing a change in velocity and it is accelerating
D.)The car is traveling at a constant rate of speed so it is not accelerating but the velocity changes because the direction the car travels is constantly changing.
Answer:
C
Explanation:
acceleration is the change in velocity so the car is exercising a change in velocity and it is accelerating....
what 2 energy resources do not rely on photosynthesis
Nuclear energy and geothermal energy are two resources that don't rely on photosynthesis. They're generated through nuclear reactions and Earth's internal heat, respectively, offering efficient and renewable alternatives to traditional energy sources.
Two energy resources not reliant on photosynthesis are nuclear and geothermal energy. Nuclear power harnesses energy from atomic reactions, such as fission or fusion, offering high energy density and continuous supply. It faces challenges in waste management and safety. Geothermal energy utilizes heat from Earth's interior, providing renewable power with low emissions and a small footprint. However, its availability is geographically limited, and extraction may impact local ecosystems. Both are vital in reducing dependency on fossil fuels and mitigating environmental impacts.
How can you use the periodic table to find the number of protons in one atom of an element?
The number of protons is the same as the atomic number of the element.
The number of protons is the same as the atomic weight of the element.
The number of protons can be found by subtracting the number of electrons from the number of neutrons.
The number of protons cannot be determined from the information on the periodic table.
can someone best explain why a washing machine represents an open system
Living cells require constant access to energy in order to remain alive. Which statement BEST describes why cells need a constant supply of energy?
Answer:
D) Energy is required in order to maintain homeostasis--without a constant, organized internal state, the cell will die.
Explanation:
Energy is required in order to maintain homeostasis--without a constant, organized internal state, the cell will die. Cells require energy to keep entropy low and organization high.
Energy is needed to maintain homeostasis because a cell cannot survive without a consistent, well-organized internal environment.
What is homeostasis?Homeostasis is defined as any self-regulating mechanism by which biological systems have a tendency to keep their stability while responding to environmental factors that are best for survival. The homeostasis of the organism maintains optimal levels of enzyme and cell activity. It is the preservation of a constant internal environment despite changes in internal and external environments.
The trait of an organism that was developed for survival is called homeostasis, and it refers to the body's ability to maintain its internal conditions regardless of its surroundings. Similar to mammals, the organism expends between 70 and 90 percent of its energy on maintaining its internal conditions, demonstrating that a significant amount of energy is needed for the organism to maintain homeostasis.
Thus, energy is needed to maintain homeostasis because a cell cannot survive without a consistent, well-organized internal environment.
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Radium is:
A. more powerful than uranium
B. less powerful than uranium
C. identical to an alpha particle
D. not a radioactive element
The correct answer is A) more powerful than uranium.
Radium is more powerful than uranium.
Radium is part of our environment. It's part of nature, in small amounts. It is part of the alkaline-earth group and was discovered by Pierre and Marie Curie in 1898. Although is soft it has a lot of radiation. When it is exposed to air, it quickly oxidizes. It corrodes in water because it forms radium hydroxide.
What is the formula for rubidium nitride
The formula for rubidium nitride is Rb₃N. Rubidium nitride is an inorganic compound composed of rubidium (Rb) and nitrogen (N) atoms.
It is an ionic compound formed by the reaction between rubidium metal and nitrogen gas. It is a solid compound that exists as a crystal lattice structure. Each rubidium ion (Rb⁺) is surrounded by nitride ions (N₃⁻) in a regular arrangement, forming a three-dimensional network of positive and negative ions held together by electrostatic forces.
Rubidium nitride is highly reactive and sensitive to moisture and air.
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besides hydrogen and oxygen what is required to produce the chemical reaction that yields water
To produce the chemical reaction that yields water, in addition to hydrogen and oxygen, energy is also required. This can come in the form of heat. A common type of chemical reaction resulting in water is dehydration synthesis.
Explanation:Besides hydrogen and oxygen, energy is required to produce the chemical reaction that yields water. For example, this energy can come in the form of heat, as shown by the enthalpy change of the reaction 2H₊ + O → H₂O, which indicates that 286 kJ of heat are released when hydrogen and oxygen gases react to form water.
A known type of reaction involving the production of water is the dehydration synthesis. In this case, one reactant gives up a hydrogen atom and another gives up a hydroxyl group (OH), causing a molecule of water as a byproduct.
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It is a large body of air that has the same properties as the Earth's surface over which it develops.what is it?
A consequence of "yo-yo dieting is that A. cholesterol levels will increase. B. A person will develop allergies to certain foods. C. The body will actually store more fat around the waist. D. The chances of diabetes will increase?
the correct option is C.
Weight cycling refers to the repeated process of loosing and gaining weight. When weight cycling is caused by dieting it is called yo-yo dieting. Yo-yo dieting has many potential negative effects and one of them is increases in body fat percentage. Other negative consequences include: diabetes, fatty liver, high blood pressure, etc.
Elements in the periodic table are arranged in columns or
EXPLAIN. List the steps that show the sun provides the energy for the surface ocean currents.
What is a person measuring when measuring the amount of space an object occupies? mass volume density gravity
Answer: The correct answer is volume.
Explanation:
Mass is defined as the amount of matter that is contained in an object. It is measured in kilograms.
Volume is defined as the amount of space that an object occupied. It is measured in [tex]m^3[/tex]
Density is defined as the ratio of an object's mass and volume. It is measured in [tex]kg/m^3[/tex]
[tex]\text{Density of a substance}=\frac{\text{Mass of a substance}}{\text{Volume of a substance}}[/tex]
Gravity is defined as the force that attracts the body to the center of the earth. It is measured in Newtons.
Hence, the correct answer is Volume.
A kernel of popcorn contains a small amount of water and when heated the popcorn pops. How can you explain this to someone
Chemicals used for controlling insects and weeds could reduce soil fertility by:
When farmers use chemicals to kill some weed or bugs, those chemicals also were absorbed by the plant and the soil.
That absorption can affect fertility because the chemical can change some chemical and physical traits from the soil and plant.
In worse cases, it can cause erosion, this means, that the soil is "dead" and nothing will grow.
what ions would you expect to find when an acid dissolves in water?
Final answer:
When an acid dissolves in water, it dissociates into hydrogen ions (H+) and anions, with strong acids fully dissociating and weak acids only partially. The H+ ions often form hydronium ions (H3O+) in the solution.
Explanation:
When an acid dissolves in water, you would expect to find hydrogen ions, denoted as H+, and anions specific to the acid. For instance, if hydrochloric acid (HCl) is dissolved, it dissociates into H+ and chloride ions (Cl-). This process is a characteristic feature of acids in an aqueous solution. A strong acid, such as sulfuric acid (H2SO4), will completely dissociate into 2 H+ ions and a sulfate ion (SO42-). These hydrogen ions often associate with water molecules to form hydronium ions (H3O+), making the solution acidic.
Svante Arrhenius defined an acid as a substance that produces H+ ions when dissolved in water, and this concept is key in understanding the behavior of acids in aqueous solutions. Weak acids, in contrast, partially dissociate, producing fewer hydrogen ions and their corresponding anions compared to strong acids.
Iodine has 53 protons and 74 neutrons: what is the atomic number? What is the atomic mass?
Iodine has an atomic number of 53 and an atomic mass of 127.
Explanation:Iodine (symbol I) has an atomic number of 53, which is equal to the number of protons in its nucleus. The atomic mass of an element is the sum of the number of protons and neutrons in its nucleus. In this case, the atomic mass of Iodine is calculated by adding the number of protons (53) and neutrons (74), giving an atomic mass of 127.
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if 50% of a radioactive element remains after 4000 years what is its half-life?
Final answer:
The half-life of the radioactive element is 4000 years.
Explanation:
In radioactive decay, the half-life is the time it takes for the activity (or radioactivity) of a substance to decrease by half.
Let's consider an example: If 50% of a radioactive element remains after 4000 years, we can determine its half-life by finding the time it takes for the original quantity to reduce by half (50%). In this case, it took 4000 years for the element to reduce from 100% to 50%. Therefore, the half-life of the element is 4000 years.
Describe how surface area affects the rate of a reaction
by increasing the surface area of a solid reactant, this can cause the rate of a chemical reaction to rise. If you cut it into pieces or make it into powder when the surface area is increased more particles will be exposed
Choose an organism that you are familiar with, and explain how the three parts of the cell theory relate to the organism
Answer:
Organism: Chicken
Explanation:
Let's suppose we have a chicken.
Chicken is a multicellular organism, with several parts such as wings, legs among many others.
The first part of cell theory: All organisms are made of one or more cells. Chicken is composed of several cells, cells are a couple in organs, such as hearth, legs and other. Each organ is composed of a specialized type of cell.
The second part of cell theory: The cell is the basic unit of organisms.The cell is the minimum expression of living organisms. Cells can eat, drink, digest and breath. Due to it, cells are the basic unit of organisms. Each cell inside the chicken can achieve own functions by itself.
Third. All cells come from existing cells.If we analyze the chicken origin, we can notice that chicken life began as an egg, a single giant cell. With time going, the single cell of the chicken was reproducing until it reaches the organism and many cells. In this sense, all chicken cells come from a single existing cell of the egg.
Suppose all of the following objects are traveling at the same velocity. Which object requires the greatest amount of force in order to change its velocity? A. a bicycle B. a motorcycle C. a sports car D. a pick-up truck
Water is different from other substances
because:
A It is more dense as a solid than a liquid
B It is less dense as a solid than liquid
C it is more dense as a gas than a liquid
D It is less dense as a solid than a gas
Answer: Option (b) is the correct answer.
Explanation:
It is known that density is the amount of mass divided by volume.
When water is present in solid state that is, in the form of ice then its molecules arrange themselves in a rigid tetrahedral structure.
Due to this there will cage like spaces between the molecules of ice during the bonding. As a result, they occupy more volume and it is known that density is inversely proportional to volume.
Hence, ice has low density as compared to liquid state of water.
When water is present in liquid state, then its molecules are closer to each other and they are able to slide past each other. Hence, space between them is less therefore, lesser will be its volume.
As a result, liquid state of water will have more density.
Thus, we can conclude that water is different from other substances because it is less dense as a solid than liquid.