Answer:
Gradually cool a gas and record its change in state
Explanation:
The experiment that the student should perform to study the effect of removing thermal energy from a system is to gradually cool a gas and record its change in state. When a gas is cooled, it loses thermal energy, causing its particles to slow down and come closer together. This can cause the gas to condense into a liquid or even freeze into a solid, depending on the conditions. Hence option D is correct.
what is thermal energy?Thermal energy refers to the energy that is generated by the movement of particles in a substance. It is a type of internal energy that is related to the temperature of a substance. The more thermal energy that a substance has, the more its particles move, and the higher its temperature.
Closing a circuit by adding a penny or nail and recording if the bulb glows does not involve removing thermal energy from a system. It is a simple experiment to test whether a circuit is complete or not and does not relate to thermal energy.
Gradually warming a liquid and recording its change in the state also does not involve removing thermal energy from a system. It involves adding thermal energy to the liquid, causing it to gain energy and potentially change from a solid to a liquid or from a liquid to a gas.
Hence option D is correct.
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give 3 examples where kinetic and potential energy is transformed into each other both ways.
Which of the following is the main evidence of life in the early universe?
Question 1 options:
dinosaur fossils
rock layering
plant remains
cyanobacteria
5.17 Unit Test: History of Life on Earth, Part 1 Pool 2
Question 2 (3 points)
Question 2 Unsaved
Which of the following would have resulted from the functions of prokaryotes on early Earth?
Question 2 options:
Earth's oceans grew larger
less oxygen gas became present in the atmosphere
less carbon became present in Earth's soil
more oxygen gas became present in the atmosphere
5.17 Unit Test: History of Life on Earth, Part 1 Pool 3
Question 3 (3 points)
Question 3 Unsaved
Which of the following was most likely not present in creating the amino acids of early Earth's waters of the past?
Question 3 options:
sulfur
nitrogen
hydrogen
ammonia
5.17 Unit Test: History of Life on Earth, Part 1 Pool 4
Question 4 (3 points)
Question 4 Unsaved
Which of the following is used as evidence in supporting the idea that life changes over time?
Question 4 options:
the big bang theory
the existence of homologous structures
the similarities in body systems such as the nervous and circulatory systems
the time period in which an embryo develops
5.17 Unit Test: History of Life on Earth, Part 1 Pool 5
Question 5 (3 points)
Question 5 Unsaved
The diagram shows embryo development of four different animals. How is this evidence used to suggest that life changes over time?
History of Life on Earth
Question 5 options:
Late-stage embryonic development illustrates how acquired characteristics have caused these species to become more differentiated over time.
The DNA of all these life forms begins exactly the same and then changes over time as it replicates to produce the organisms different traits.
These stages indicate that animals within a species must have changed over time.
Striking similarities at early developmental stages is evidence that they came from a common ancestor.
5.17 Unit Test: History of Life on Earth, Part 1 Pool 6
Question 6 (3 points)
Question 6 Unsaved
Which of the following describes how homologous structures provide evidence to support that life changes over time?
Question 6 options:
some animals exhibit similar structures, possibly due to a common ancestor
some animals exhibit similar stages of embryonic development
some animals exhibit structures that are no longer used for any purpose
some fossils exhibit similar biological proteins
Question 7 (3 points)
Question 7 Unsaved
How can these forelimbs explain how life changes over time?
History of Life on Earth
Question 7 options:
These illustrations show the progressive development of the forelimb in a species over time, one example of how life has changed over time.
These illustrations show the homologous forelimbs of four different species with enough similarities to suggest all had a common ancestor.
The illustrations show the vestigial structures of four different species that once had a function in an ancestral organism but no longer have a function today.
These illustrations show the variety of bone structures that exist among different species and how life has changed over time as new species develop.
Answer:
number 2 is D im pretty sure
Explanation:
How do natural selection and evolution contribute to antibiotic-resistant bacteria ?
HELP PLEASE
What is a common issue with both tidal power and OTEC?
Maintenance costs due to salt water corrosion
Necessary temperature differences in the water
Having to construct a dam
All of the above
The answer should be the first option
Maintenance costs due to salt water corrosion
Inorganic fertilizers have a positive effect on agricultural crops but can adversely affect surrounding areas. What is a negative result of increased inorganic fertitizer run-off into ponds and lakes?
Inorganic fertilizers have a positive effect on agricultural crops but can adversely affect the surrounding areas and show a negative result by running off into ponds and lakes. The fertilizers are toxic and can pollute the water bodies.
What are inorganic fertilizers?Fertilizers are the chemicals which are added to the soil to increase the fertility of soil. Chemical fertilizers overuse can contribute to both the soil acidification and the soil crust, thus reducing the content of organic matter, humus, beneficial species in the soil and also reduces the plant growth, alters the pH of soil, growth of pests, and even lead to the release of many greenhouse gases.
Too much use of fertilizers can kill the plants and the excess amount of fertilizers can runoff into waterbodies causing toxic algal blooms to develop which are harmful to aquatic life and other living organisms. Excess fertilizer runoff from agricultural lands can also contribute to aquatic “dead zones” in coastal areas.
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An unlabeled hierarchical diagram of various astronomical bodies is shown below. The labels A, B, C, and D can be used to represent the Milky Way, Earth, universe, sun, and solar system.
Part 1: Which four astronomical bodies would you choose to represent the four labels in the diagram?
Part 2: Which astronomical body, other than the ones given, could also represent the label D?
Please Explain all your Work
what is the path that a body follows as it travels around another body in space is
Answer:
The movement is called revolution when a body travels around another body in space.
Explanation:
The movement is called revolution when a body travels around another body in space. It is different from rotation which is a phenomenon where a body revolves around its own axis. For example, we can assume the motion of earth as revolution when it travels around the sun and completes one complete revolution in one year, on the other hand when it moves around its own axis the day and night transformation happens. We can also take the example of moon which revolves around the earth and many other planets which revolve around the sun. So it is very easy to understand the concept of revolution.
Hope it helps!
During a total solar eclipse, you observe a red ring in the sky. Which part of the Sun are you seeing?
a)corona
b)photosphere
c)chromosphere
d)radiative zone
Understand how and why heredity increases the diversity among organisms
under ideal conditions, bacteria have a generation time of about 20 minutes. Humans have a generation time of about 20 years. Which would you expect to evolve faster? Why?
Bacteria would be expected to evolve faster than humans due to their significantly shorter generation time. This allows for frequent genetic recombination and mutation, resulting in rapid adaptation to environmental changes.
Explanation:Under ideal conditions, bacteria, such as Escherichia coli, can have a generation time as short as 20 minutes due to binary fission. This rapid reproduction, coupled with mechanisms of genetic recombination and high rates of mutation, results in the rapid evolution of bacteria. They can respond to environmental changes, such as the introduction of an antibiotic, very swiftly.
On the other hand, humans, as eukaryotic organisms, have a typical generation time of about 20 years. The significantly longer generation time in humans slows the pace of evolution considerably when compared to bacteria.
Therefore, under ideal conditions, we would expect bacteria to evolve faster than humans due to their shorter generation time, allowing for more frequent genetic recombination and mutation.
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describe the interior of the rats stomach
Which factor can increase the potential energy of an object?
Decrease in speed
Decrease in density
Increase in temperature
Increase in height from the ground
Prokaryotes that live in almost every habitat are...
What is the main function of environmental policy? a. prevent the use of natural resources b. reduce human impact on the environment c. prevent nature from having a harmful effect on humans d. reduce the use of natural resources Please select the best answer from the choices provided
The correct answer is option B
The main agenda of environmental policy is to reduce the impact of human activities on environment. Human activities can adversely effect the environment.
This policy makes sure that there must be a healthy interaction between the environment and human beings.
It has some policy that has to be maintained by the human beings to reduce its effect on environment.
The main function of environmental policy is to reduce human impact on the environment by regulating activities that affect natural resources and ecosystems.
Explanation:The main function of environmental policy is b. reduce human impact on the environment. Environmental policies are developed and implemented by governments and organizations to protect natural ecosystems, manage natural resources sustainably, and mitigate the negative effects of human activities on the environment.
These policies can include regulations on pollution, conservation efforts for wilderness areas and fresh water supplies, managing fossil fuel reserves, and reducing atmospheric carbon dioxide to combat climate change.
The rationale behind such policies is to ensure a balance between economic development and environmental protection, thus safeguarding the planet for current and future generations.
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From the images, what can you infer about the wings of the bat and the butterfly? They have a similar structure but perform a different function. They have a similar structure and perform a similar function. They have a different structure and perform a different function. They have a different structure but perform a similar function.
Answer:
They have a different structure but perform a similar function
Which statement is true of Y chromosomes?
Answer: Only men have them
Explanation: just got it right on A p E x
You come to work one morning to discover the electricity has gone off in the refrigerator in the laboratory. This refrigerator houses the reagents needed to perform the laboratory tests and you have a full day of patients scheduled.
1. How will you proceed?
2. Is there a way to determine whether or not the reagents are still acceptable? Why or why not?
3. How could this have been prevented?
an object in an electrical circuit resists the flow of energy called a
A switch
B resistor
C ohm
D current
The tiles below show several organisms that can be found in a desert ecosystem. Arrange the organisms in order of energy transfer to create the most likely food chain.
plant
hawk
mouse
grasshopper
snake
Answer:
plant - grasshopper - mouse - snake - hawk
Explanation:
A food chain shows how energy is transferred from one organism to another in an ecosystem. Arrows point from one organism to the organism that eats it. Photosynthetic organisms, such as plants, are always at the bottom of a food chain. In a desert ecosystem, plants would be eaten by grasshoppers, grasshoppers would be eaten by mice, mice would be eaten by snakes, and snakes would be eaten by hawks. So, the most likely food chain would be:
plant → grasshopper → mouse → snake → hawk
Which of the following is NOT a function of Earth's atmosphere?
A. provides carbon dioxide for plants
B. provides oxygen for plants and animals
C. keeps volcanoes from erupting too much
D. keeps Earth's surface at a comfortable temperature
The function of the earth's atmosphere does not involve the volcanoes that erupted so much.
The following should be the function of the earth atmosphere:
It gives carbon dioxide to plants. It gives oxygen to plants & animals. The surface of the earth should be at the temperature i.e. comfort.Therefore we can conclude that the function of the earth's atmosphere does not involve the volcanoes that erupted so much.
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Evolution never occurs in a straight line. There are always branches and nodes that can be seen along the way. Based on the image, which two statements are true?
1)All organisms have had one common ancestor in the past.
2)Chimpanzees are more evolved than all other organisms.
3)Gorillas share an extinct ancestor with bonobos.
4)Humans and chimpanzees are equally evolved.
5)Orangutans are unrelated to gorillas or bonobos.
Ans.
In a evolutionary or phylogenetic tree, the nodes represent common ancestral species of the descendants, which are represented by the tips of branches, arising from the nodes.
According to the given evolutionary tree, all organisms are evolved from a common ancestor, represented by the last node, which was present about 13 million years ago. Hence, the option 1). is correct.
The second last node is showing a common ancestor to gorilla, chimpanzee, bonobo, and human, which was evolved to different species about 6 million years ago. Hence, the option 3). is correct.
Thus, the correct options are 'option (1). and option (2).'
All organisms have had one common ancestor in the past. This statement reflects the concept of universal common ancestry in evolutionary biology. Gorillas share an extinct ancestor with bonobos. This statement suggests that gorillas and bonobos, two different species of primates, share a common ancestor in their evolutionary history.
The correct option is 1 and 3.
Over vast periods of time, species diverged and branched off from this common ancestral lineage, leading to the diversity of life we see today. The branching or divergence of their lineages from this common ancestor resulted in the separate evolution of gorillas and bonobos as distinct species.
Evolution does not work on a linear scale where one species is more "evolved" than others. Each species has its own unique evolutionary history and adaptations. Chimpanzees are more closely related to humans than they are to some other organisms, but this does not imply a hierarchy of evolutionary advancement. Evolutionary history does not involve a concept of species being equally evolved. Humans and chimpanzees share a common ancestor but have followed different evolutionary paths, resulting in distinct species. Orangutans, gorillas, and bonobos are all primates and share a common ancestor further back in evolutionary history. They are related, but they belong to different branches of the primate family tree, with each species having its own evolutionary lineage.
Hence , 1 and 3 are the correct option
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Please I need help with questions 73 and 74 and 75 and it’s very hard and I’m struggling with it and if you need to see the picture big then click on it and it will be big
Two atoms are isotopes of the same element. Which of the following should be the same for these two atoms? A. The number of molecules B. The number of protons C. The number of neutrons D. The number of electrons
The answer is option B. The number of protons
If two atoms are isotopes of the same element then the number of protons in those two atoms must be same but the number of neutrons must not be same. If number of neutrons of an atom vary but number of protons in them are same then it simply means that they both are isotopes of a particular element. As we know that every atom has a nucleus which has protons and neutrons and due to these protons and neutrons an atom has weight. Apart from that, an atom has electrons too but they are outside the nucleus. Electrons are extremely light in weight so they do not contribute towards weight but they have a great role in chemical reactions. During chemical reactions, it is electron which directly participates, while proton and neutrons do not take part or move during chemical reactions. Also, in a neutral atom number of protons is equal to number of electrons but when an atom becomes negatively or positively charged, it can gain or loose electrons so electrons have tendency to vary. That is why we cannot consider electrons to be always same for isotopes of an element. It is clear that for an isotope, the number of electrons and neutrons will vary but the number of protons will always be fixed.
Isotopes of an element are atoms of the same element with the same number of protons but different numbers of neutrons. So, the number of protons in the atoms right answer.
Explanation:The correct answer for this question is B. The number of protons should be the same for two atoms to be considered isotopes of the same element. Isotopes are different forms of the same element that have the same number of protons, but a different number of neutrons. This means that they are in fact the same element, as the number of protons in an atom determines what type of element it is. Regardless of whether an isotope is radioactive or stable, it will still have the same number of protons as the original element. The number of electrons or molecules do not determine isotopic identity.
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which of these is a concern about the use of biotechnology
Water harvesting, the collection of rainfall and run off for future use, has been practiced for thousands of years; but in some regions where it was previously used it has been forgotten. In countries facing huge problems with land erosion due to runoff, governments have been encouraging the implementation of this technique. The implementation is important for more than prevention of water erosion. What other benefit might water harvesting have in these areasscience
Answer:
To provide clean drinking water in areas where there is no ground water or it is contaminated.
Explanation:
Rainwater can be reused in a number of ways where with a rainwater catchment system it is entirely possible to reduce the use of drinking water as well as expenses, not to mention flood reduction, flooding, future water rationing, and still help the environment with that.
In addition to allowing the drinking water economy, rainwater capture is extremely important in places where water is contaminated or drought punishes almost the whole year and water scarcity ends up being frequent as is the case of countries like Africa for example.
Which of the following processes transfers carbon directly from sea organisms to seawater? Diffusion Evaporation Photosynthesis Respiration
Answer:
i thought it was evaporation lol
Explanation:
who was evolution established by
when a divergent boundary occurs under the ocean it is called
which action can both humans and flatworms do?
a. form images from sensory signals
b. see the shape of an approaching predator
c. smell fresh food
d. communicate verbally
An action that can both humans and flatworms do is, to smell fresh foods.
What do you mean by Flatworms?Flatworms may be defined as an organism that belongs to the phylum Platyhelminthes and possesses soft-bodied invertebrate usually much-flattened acoelomate.
The sensory receptors of flatworms are not much developed due to a lack of spinal nerves. They are not able to communicate verbally as well.
Therefore, an action that can both humans and flatworms do is, to smell fresh foods.
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which biome has multistory communities?
Rain Forest (:
(Novanet)
The correct answer is rain forest.
The tropical rainforest refers to a forest of tall trees in the warm regions of the planet. An average of 50 to 260 inches of rain falls annually. Rainforests come under the tropical wet climate group.
Rainforests cover about 6 percent of the Earth's land surface. The tropical rainforests generate about 40 percent of the Earth's oxygen. The rainforests are biomes that comprise of various communities within them. A community refers to a naturally taking place group of local animals, plants, and other species, which are associating in a specific habitat.