The presence of glaciers on the surface of Africa is evidence that it moved outwards from a central point in southern Africa.
What is a Glacier?This is defined as the persistent body of dense ice that is constantly moving under its own weight.
Glaciers being found on African surface depicts that the movement occurred outward from Southern Africa during the period.
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Answer: Below
Explanation:
Steal wool + oxygen (fire): The steel wool is a grayish color and has a rough surface. Oxygen is transparent It looks like a powder, and like if it was rusted steel wool but then broken apart and turned into a powder Well Iron oxide is 7 grams and steel wool combined is 7 grams so you can say that the mass was conserved Yes, this is a chemical change because the steel wool rusted and rust is a chemical change, so iron oxide is cause because if a physical change.
Egg + Heat : The egg has a yellow yolk in the middle while there is some type of liquid at the border of the yolk, but it is clear, the heat is hot but transparent The egg turned into a delicious food called an omelet what was yolk staid as a liquid but got a tad harder, but the transparent border around it turned white It was conserved because the eggshell was 4 grams and the fried egg is 41 grams It is a chemical change because it results in the formation of new particles, and the chemical bonds break up and new ones are formed.
Water + Heat The water is a clear liquid, while the heat is very hot but transparent The water turned into a type of oxygen -Water Vapor- If 5 g of water becomes a gas it becomes 5 g of water vapor. The mass of the liquid water is simply transferred into the mass of the newly formed water vapor. There was no chemical reaction because the water vapor can be turned back to water also it just changed from a liquid to a gas and did not change its composition
Zinc + Hydrogen Chloride Zinc: a white/silver metallic solid. Hydrogen chloride (dilute hydroelectric acid) a transparent, colorless liquid with a very low pH (acidic). Zinc "dissolved" in hydrogen chloride, while emitting a colorless gas. The liquid remains a colorless liquid, possibly still having a low pH from the unused acid. The colorless gas collected in a test tube gives a popping sound when ignited with a burning wooden splint, so it is not air embedded in the zinc, nor dissolved in hydroelectric acid. Well although the zinc chloride is 12 grams and not 15 the gas that was released was 3 grams and as we all know 3 + 12 is 15 so you could say that the mass was conserved The production of a new substance (most probably hydrogen) from the reaction of the two reactants. When a few drops of the liquid product are evaporated on a watch glass, a white residue is left.
When a few drops of the liquid hydroelectric acid are evaporated on a watch glass, there is no residue. This proves that a new product (hydrogen gas), (white powder, zinc chloride) is produced instead of zinc being physically dissolved in hydroelectric acid.
Sodium Hydroxide + Copper Sulfate Sodium hydroxide is a turbid solution and copper sulfate is in form of bright blue crystals. When their solutions are mixed with each other, a pale blue precipitate of basic copper hydroxide & a solution of neutral salt sodium sulfate will be formed. The sodium hydroxide and the copper sulfate combined make a total of 67 grams and the product is split because the sodium sulfate is 47 grams and the copper hydroxide is 20 grams but all together it is still 67 grams so you could say that the mass was conserved The proof of the reaction is the appearance of pale blue precipitates of basic copper hydroxide & a solution of neutral salt sodium sulfate.
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Answer:
When launching a rocket in space, the rocket's fuel starts burning and is pushed downward in the form of a gas. Due to which an external force is generated on the rocket in an upward direction which is a reaction of the force of burning fuel gas.
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Shay constructed a scientific model of the carbon cycle. She included plants, animals, industry, fossil fuels, and the atmosphere. Which of the following arrows belongs in Shay’s model?
Answer:
no one can answer your question because you have shown no arrows.
Which of the following always changes when a substance undergoes a chemical change?
A. State of matter of the substance.
B. Arrangement of the atoms composing the substance.
C. Color of the substance.
D. Mass of the substance.
Answer:
C
Explanation:
All chemical reactions will show a change in color.
How can energy transfer affect the physical and chemical properties of matter?
A physical change is a change in the state or properties of matter without any accompanying change in the chemical identities of the substances contained in the matter. Physical changes are observed when wax melts, when sugar dissolves in coffee, and when steam condenses into liquid water. Other examples of physical changes include magnetizing and demagnetizing metals (as is done with common anti-theft security tags) and grinding solids into powders (which can sometimes yield noticeable changes in color).
The characteristics that distinguish one substance from another are called properties. A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. Some physical properties, such as density and color, may be observed without changing the physical state of the matter. Other physical properties, such as the melting temperature of iron or the freezing temperature of water, can only be observed as matter undergoes a physical change
Figure :Copper and nitric acid undergo a chemical change to form copper nitrate and brown, gaseous nitrogen dioxide. During the combustion of a match, cellulose in the match and oxygen from the air undergo a chemical change to form carbon dioxide and water vapor. Cooking red meat causes a number of chemical changes, including the oxidation of iron in myoglobin that results in the familiar red-to-brown color change.
chemical change always produces one or more types of matter that differ from the matter present before the change. The formation of rust is a chemical change because rust is a different kind of matter than the iron, oxygen, and water present before the rust formed. The explosion of nitroglycerin is a chemical change because the gases produced are very different kinds of matter from the original substance. Other examples of chemical changes include reactions that are performed in a lab (such as copper reacting with nitric acid), all forms of combustion (burning), and food being cooked, digested, or rotting. Note that the number of atoms for a given element is calculated by multiplying the coefficient of any formula containing that element by the element’s subscript in the formula. If an element appears in more than one formula on a given side of the equation, the number of atoms represented in each must be computed and then added together. For example, both product species in the example reaction, CO2 and H2O, contain the element oxygen, and so the number of oxygen atoms on the product side of the equation is
(1 CO2 molecule × 2 O atoms per CO2 molecule) + (2 H2O molecules × 1 O atom per H2O(molecule) = 4 O atoms
The equation for the reaction between methane and oxygen to yield carbon dioxide and water is confirmed to be balanced per this approach, as shown here: CH 4 + 2O2⟶CO2 + 2H2O
Element Reactants Products Balanced?
C 1×1 = 1 1×1 = 1 1 = 1, yes
H 4×1 = 4 2×2 = 4 4 = 4, yes
O 2×2 = 4 (1×2) + (2×1) = 4 4 = 4, yes
A balanced chemical equation often may be derived from a qualitative description of some chemical reaction by a fairly simple approach known as balancing by inspection. Consider as an example the decomposition of water to yield molecular hydrogen and oxygen. This process is represented qualitatively by an unbalanced chemical equation: H2O⟶H2 + O2 (unbalanced)
Comparing the number of H and O atoms on either side of this equation confirms its imbalance:
Element Reactants Products Balanced?
H 1×2 = 2 1×2 = 2 2 = 2, yes
O 1×1 = 1 1×2 = 2 1 ≠ 2, no
H2O to H2 O2 would yield balance in the number of atoms, but doing so also changes the reactant’s identity (it’s now hydrogen peroxide and not water). The O atom balance may be achieved by changing the coefficient for H2O to 2.
2H2O⟶H2 + O2 (unbalanced)
Element Reactants Products Balanced?
H 2×2 = 4 1×2 = 2 4 ≠ 2, no
O 2×1 = 2 1×2 = 2 2 = 2, yes
The H atom balance was upset by this change, but it is easily reestablished by changing the coefficient for the H2 product to 2.
2H2O⟶2H2 + O2 (balanced)
Element Reactants Products Balanced?
H 2×2 = 4 2×2 = 4 4 = 4, yes
O 2×1 = 2 1×2 = 2 2 = 2, yes
These coefficients yield equal numbers of both H and O atoms on the reactant and product sides, and the balanced equation is, therefore:
2H2O⟶2H2 + O2
Types of Chemical Reactions
Humans interact with one another in various and complex ways, and we classify these interactions according to common patterns of behavior. When two humans exchange information, we say they are communicating. When they hit each other with their fists, we say they are fighting
A photograph is shown of a yellow green opaque substance swirled through a clear, colorless liquid in a test tube.
with the development of technology why is muscle atrophy occurring more often what can you do to stop it THIS IS A SCIENCE QUESTION
Answer: Technology is causing people to sit around more while using it. Therefore people are not exercising as much. This causes the strength of muscles to go away. A way to help stop this is to get exercise for at least one hour a day.
Explanation:
In this project, you will practice calculating work and speed using the proper formula. You will also use a data table to record and analyze your data. For each question, you will complete a row in your data table to record the details, and your results. Don't forget to use proper units of measurements in all of the parts of your table!
pls help asap mark brainyist can't spell sorry
Answer:
CHECK THE IMAGE
Explanation:
Fossils are the preserved remains or traces of an organism that used to be alive.
Answer:
This is True
Explanation:
A fossil is any remains or trace of an ancient organism. Fossils include body fossils, left behind when the soft parts have decayed away, as well as trace fossils
If the Titan lake evaporated, how would the change in kinetic energy affect the speed of the molecules found in the lake? (highlight one)
The kinetic energy would increase. The molecules would move faster.
The kinetic energy would decrease. The molecules would move slower.
There would be no change in kinetic energy. The molecules would move at the same speed.
Answer:
a) The kinetic energy would increase. The molecules would move faster.
What type of fossil forms when the impression from the remains of an organism is filled in with soil and hardens into the shape of the original organism?
Answer:
i belive its a "Mold fossil"
Explanation:
can someone solve this question please
Answer:
I can't see the question
Explanation:
List the communities in a successional sequence of secondary succession?
The given communities can be ordered in the secondary succession as grass, shrubs, small trees and large tress.
What is secondary succession ?The life cycle of a plant is characterized by secondary ecological succession. Secondary succession, in contrast to primary succession, is a process initiated by an occurrence such as a forest fire, harvesting, hurricane, etc. that reduces an already established ecosystem (such as a forest or a wheat field to a smaller population of species.
As a result, secondary succession occurs on preexisting soil, whereas primary succession typically takes place in a location lacking soil. Many elements, including trophic interaction, starting composition, and competition, might influence secondary succession. Trade-off with colonization
Therefore, the given communities can be ordered from the small level to higher level as grass, shrubs, small trees and large tress.
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Your question is incomplete. But your complete question is as follows:
List the given communities in a successional sequence of secondary succession? shrubs, small trees, grass, large tress.
You have been given the task of designing a heat pack to relieve soreness in muscles by combining oxygen and iron. The more oxygen that is added to iron, the more it will heat up. Which of the following temperature changes would you be looking for?
A.There will not be a reaction
B.An increase in temperature, showing an endothermic reaction
C.You should not expect a temperature change because this is a physical reaction
D.An increase in temperature, showing an exothermic reaction
Answer:
an increase in temperature showing an endothermic reaction
Explanation:
the atmospheric oxygen is supplied to the iron .An endothermic reaction is any chemical reaction that absorbs heat from its environment.
Plz help! Write your answer in complete sentences ! Write a proper answer! 1st one to answer will get a brainliest!
Answer:
the name for CaCO3 is Calcium Carbnate, and its relations with coral reefs is that the process for making said compuond happens within coral, and is considered the building block for coral reefs.
Explanation:
hope this helps!
6 CO₂ + 6 H₂0 → C₆H₁₂O₆ + 6 O₂
A. 6 CO₂
B. →
C. 6 H₂0
B. C₆H₁₂O₆
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Answer: Hubble's brilliant observation was that the red shift of galaxies was directly proportional to the distance of the galaxy from earth
Explanation:
How does the development of the heliocentric model show how scientific ideas change over time?
Answer: Italian scientist Giordano Bruno was burned at the stake for teaching, among other heretical ideas, Copernicus' heliocentric view of the Universe. In 1543, Nicolaus Copernicus detailed his radical theory of the Universe in which the Earth, along with the other planets, rotated around the Sun.
Explanation:
Italian scientist Giordano Bruno was burned at the stake for teaching, among other heretical ideas.
What is Heliocentric model?Copernicus' heliocentric view of the Universe. In 1543, Nicolaus Copernicus detailed his radical theory of the Universe in which the Earth, along with the other planets, rotated around the Sun.
Because of heliocentrism, we now understand that Earth and the other planets of the solar system all orbit the sun.
But there once was a theory that put Earth at the centre of what was thought to be the entire cosmos and that everything literally revolved around us. The sun is at the centre of the heliocentric model, which is now known as the geocentric model.
Therefore, Italian scientist Giordano Bruno was burned at the stake for teaching, among other heretical ideas.
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Mixing baking soda and vinegar is an example of an endothermic reaction. This means...
A. baking soda and vinegar are products in this reaction.
B. energy is taken in during the chemical reaction.
C. energy is released during the chemical reaction.
D. there is no change in energy during the chemical reaction.
A submarine fills a special storage area known as a ballast with water in order to increase its density. This allows it to dive deeper in the ocean. When a submarine needs to rise rapidly, compressed air is used to push the water out of the ballast. What effect does replacing the water in the ballast with air have on the submarine?
Answer:
the submarine floats after replacing the water with the compressed air
Answer:
The submarine will rise.
Explanation:
To get a submarine to surface, the main vents in the top of the tank are closed and high-pressure compressed air is blown into the ballast tanks, forcing the water out through the flood ports at the bottom of the tank. This increases the vessel's displacement.
Explain the green house effect (make sure that you explain the role of the Nitrogen and Carbon cycle)
Answer:
Nitrogen emissions such as ammonia, nitrogen oxide and nitrous oxides contribute to particulate matter and acid rain. Nitrous oxide is a particularly potent greenhouse gas as it is over 300 times more effective at trapping heat in the atmosphere than carbon dioxide.
Explanation:
What is inertia?
1 . the tendency of an object to stay at rest or in motion
2. the energy of an object because of its position
3. a force that pulls objects toward each other
4. a force that slows an object down
Answer:
A. The tendency of an object to stay at rest or in motion.
Explanation:
Interna makes stuff stay on motion or in place.
Answer:
the tendency of an object to stay at rest or on motion
Martin slowly pours an unknown liquid into a container that originally had some water in it. He is measuring the temperature in the container as he does this.
The temperature in the container rises very fast.
What kind of change is likely to be happening in the container?
A. A physical change.
B. A chemical change.
C. Neither a chemical nor a physical change, only a temperature change.
D. No evidence of any type of change.
Answer:
B
Explanation:
temperature is a characteristic of a chemical change
The Statue of Liberty is made of copper metal. Copper metal has the physical property of being orange in color. Over years of being exposed to moist air, the surface of the statue has begun to form a green coating. Is the green coating the product of a physical or chemical change? Explain how the green layer is formed.
Answer:
The statue is made of a metal called copper. Over time, the copper has gone through a chemical change. This is called a chemical reaction.
Explanation:
i dont think this will help...
Answer:
Chemical.
Explanation:
Pretty sure its chemical, due to it oxidising which is a chemical reaction.
Plz, help! I need help with questions a and b! Plz, write your answer in complete sentences! And the first person to answer will get a brainliest! Plz, NO SCAM links!!!!!!
Answer: An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
The acceleration of an object depends on the mass of the object and the amount of force applied.
Whenever one object exerts a force on another object, the second object exerts an equal and opposite on the first.
Explanation: can i have brainliest
Plz, help! I need help with questions a and b! Plz, write your answer in complete sentences! And the first person to answer will get a brainliest! Plz, NO SCAM links!!!!!!!
Is gravity alone sufficient to explain the behavior of the tinsel in the Levitating-orb system? Explain why.
Answer:
The object is moving forward
Explanation:
Hop this helps :)
How does the Coriolis effect impact the Gulf Stream and the Brazil Current?
It turns the Gulf Stream southwest and the Brazil Current northeast.
It turns the Gulf Stream northwest and the Brazil Current northeast.
It turns the Gulf Stream northeast and the Brazil Current southwest.
It turns the Gulf Stream northeast and the Brazil Current northwest.
Answer:
Honestly, I think it is C.
Explanation:
Brazil is in the south, so that's why it is C.
hope this helped.
In a chemical reaction, which of the following is true of the products?
A. The products have the same shape as the reactants.
B. The products have the same physical properties as the reactants.
C. The products have the same state of matter as the reactants.
D. The products have the same number atoms as the reactants.
The correct statement about the chemical reaction is "the products have the same number atoms as the reactants."
What is chemical reaction?A chemical reaction occurs when one or more reactants (also known as reactants) are changed into one or more products (also known as products).
Chemical transformation occurs as a result of this process, which involves the breaking and forming of chemical bonds.
Rust is formed when iron and oxygen combines with each other.
Only the atoms present in the reactants can end up in the products of a chemical reaction. There are no new atoms formed, and no atoms destroyed.
In a chemical reaction, the reactants and products have the same atoms, but they are rearranged during the reaction. As a result, the atoms in the products end up in various combinations. As a result, the products are new chemically distinct substances from the reactants.
Hence, the correct statement is option D.
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Slow cooling of hot magma leads to the formation of ___________ crystals
Answer:
Slow cooling leads to the formation of large crystals. If the crystals remain undisturbed while cooling, they grow according to a regular pattern. Magma closer to the surface cools much faster than magma that hardens deep below ground. With rapid cooling, there is no time for magma to form large crystals.
Explanation:
Hope it's help
Answer:
large
Explanation: