please help me with this Based on which of the following changes is an indicator useful?
A.
Temperature
B.
Physical state
C.
Color
D.
Pressure
Answer:
the answer is C
Explanation:
colour is the most indicater in the chemistry
Why is the geocentric model not correct?
Why do hens scream in the morning ?
Answer:
The reason why hens yell in the morning is because they are either vocalizing with each other, they want to be let out of the coop,they have laid an egg, or they are trying to alert you or another chicken. Hens are vocalizing creatures.
Explanation:
Select the tool that is called the test tube.
Answer:
The tube without anything
Explanation:
because everything else is used for like cooking besides the one without anything!
Which of these diseases is not caused by improper disposal of sewage?
A. Cholera
B. Heart Attack
C. Jaundice
D. Typhoid
Examine each of the four circles containing molecules.
Choose the circle that contains a mixture of molecules,
and provide an explanation for choosing your answer.
Answer:
Circle D
Explanation:
The Circle that contains the mixture is circle D because it contains blue, pink, and gray molecules. Although circle C has blue and gray molecules there aren't any pink molecules.
The four circles are having certain colors of molecules representation. Image C and D are having the colors mixed with pink and grey and pink, grey and blue molecules.
What is the homogeneous mixture ?It is formed by mixing in which the composition is uniform throughout the composition.
Homogeneous mixture is the mixture in which the composition of the substances is uniform throughout the mixture and the heterogeneous is the one in which there is non uniformity in the mixture.
Image C and D are showing the different colors of the molecules that are clearly stating that the molecules are mixed that are different and it is visible of the the different colours from the images.
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Select the dropper pipette.
Select the tool that is called the beaker.
Answer:
The fourth one is the beaker.
Explanation:
Beakers are useful as a reaction container or to hold liquid or solid samples. They are also used to catch liquids from titrations and filtrates from filtering operations. Laboratory Burners are sources of heat.
The beaker is typically made of glass or plastic and has a cylindrical shape with a flat bottom and a spout for easy pouring. Therefore image 4 is correct.
The beaker is a simple and versatile laboratory tool used for holding, mixing, and measuring liquid substances.
Beakers come in various sizes, ranging from small to large capacities, and are marked with volume measurements for accurate liquid volume readings.
They are commonly used in chemistry, biology, and other scientific disciplines for tasks such as preparing solutions, conducting experiments, and holding samples.
The beaker's wide mouth and durable design make it a fundamental and indispensable tool in any laboratory setting.
Therefore image 4 is correct.
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a)Explain how normal rainfall is slightly acidic.
b)Name two greenhouse gases
c)Give 3 sources of acid rain
d)State and explain the process of making acid rain
In this activity, you will write a description of the terrarium model you created to represent the different systems (spheres) of Earth. Make sure to include the words geosphere, biosphere, hydrosphere, and atmosphere in your description.
Answer:
Below
Explanation:
The geosphere refers to the land of the Earth.
The biosphere refers to all the living things on Earth.
The hydrosphere refers to all of the water in the Earth.
The atmosphere refers to the air on Earth.
To create a terrarium model, you could start by placing rocks all throughout the bottom of it. Pile up more on one side to create a hill. This represents the geosphere. Then, fill some of it with water. Make sure some of the rocks of that hill you made are still above the water, however. This represents the hydrosphere. Next, add a little plant or even a toy animal in to represent the biosphere. Finally, the remaining space represents the atmosphere, as humans can't see it so it's just clear.
The terrarium is a small, enclosed ecosystem that beautifully showcases the geosphere, biosphere, hydrosphere, and atmosphere in miniature form.
The geosphere is represented by the solid base of the terrarium, which mimics the Earth's crust and surface. Various rocks, pebbles, and soil are incorporated to depict the diverse landscapes found in the geosphere, such as mountains, valleys, and plains.
For the biosphere, added a selection of plants and small organisms. These living elements bring the terrarium to life, representing the complex interactions between flora and fauna found in the biosphere. Plants play a crucial role in converting carbon dioxide to oxygen through photosynthesis, simulating the vital connection between the biosphere and the atmosphere.
Next, the hydrosphere was depicted by a small, serene water feature within the terrarium. This mini aquatic environment captures the essence of Earth's oceans, rivers, and lakes, showcasing the interconnectedness of the hydrosphere with other systems. The water's presence also influences the microclimate, creating a more dynamic terrarium ecosystem.
Finally, the atmosphere is subtly indicated by the transparent walls of the terrarium, enclosing and safeguarding the entire model. This clear boundary represents the thin layer of gases surrounding Earth, providing protection and the right conditions for life to thrive within the terrarium's microcosm.
Thus, the combination of these different elements in the terrarium creates a harmonious representation of Earth's interconnected systems.
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Is serine a natural occurring molecule, why or why not? Why is serine chemical and physical properties? How does serine properties affect the physical property of a molecule?
What type of the process(s) is/are shown in the figure below?
(1) Malleability
(2) Ductility
(3) Elasticity
(4) All of the choices
what is the geocentric model (please give simple answer and this is for my notes so there is no choices to pick from)
The geocentric model is a cosmological model that places the Earth at the center of the universe. This model was the prevailing view of the cosmos for centuries, and it was supported by the apparent daily movement of the Sun, Moon, and stars across the sky.
However, the geocentric model was eventually disproven by the heliocentric model, which places the Sun at the center of the universe.
The geocentric model was first proposed by the ancient Greek philosopher Ptolemy in the 2nd century AD. Ptolemy's model was based on the observation that the Sun, Moon, and stars all appear to move across the sky in a regular and predictable way.
He also observed that the planets appear to move in a looping pattern, which he explained by proposing that they orbit the Earth in a series of nested spheres.
Ptolemy's model was very successful in explaining the apparent motions of the Sun, Moon, and stars. However, it was not without its flaws.
For example, the model required the introduction of a number of epicycles, which were small circles that were attached to the larger circles that the planets orbited. These epicycles were necessary to explain the looping motion of the planets.
The geocentric model was eventually disproven by the heliocentric model, which was proposed by the Polish astronomer Nicolaus Copernicus in the 16th century.
Copernicus's model was based on the observation that the planets all orbit the Sun in the same direction, and that they all have nearly circular orbits. He also observed that the Earth rotates on its axis once every day and that it orbits the Sun once every year.
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