Select all that apply.
Problems with solar energy include _____.
the inability of current technology to capture large amounts of the Sun's energy
the inability of current technology to store captured solar energy
inconsistencies in the availability of the resource
lack of demand for solar energy
I just turned in my assignment and the answers are:
"the inability of current technology to capture large amounts of the Sun's energy"
"the inability of current technology to store captured solar energy"
"inconsistencies in the availability of the resource"
Hope this helps! :)
A scientist found a hominid fossil that appeared anatomically to be that of Homo habilis. It was found, however, in a rock layer that suggests it is only about 150,000 years old. Based on this, he wants to publish a paper asserting the fossil shows that Homo habilis lived much longer than thought and was contemporary with early Homo sapiens. Which of the following should he do to build a stronger case before he publishes? (2 points)
Convince other scientists to support his conclusions about the fossil.
Look for evidence of cave paintings at the site where he found the fossil.
Find out how old the fossil actually is using radioactive dating.
Look for similar fossils in the same rock strata.
The correct answer is C. Find out how old the fossil actually is using radioactive dating.
Explanation:
A fossil refers to remains or evidence of the existence of a specific species in the past and that help scientist known the species that lived during a certain geological period. Additionally, one of the most common methods to determine how old a fossil is the use of rock layers that compares previous fossils and the layer in which they were found to new fossils, this is the case of the scientist that found a fossil that seems to belong to a Homo habilis and suggest this species lived longer than thought.
However, as the age of this fossil has been determined only based on rock layers to build a stronger case the scientist will need to corroborate the age of the fossil using other methods as rock layers can be imprecise this includes methods such as the radioactive dating that uses the radioactive isotopes to find the age of rocks or fossils and in some cases is more precise than other methods. Therefore, the step this scientist should follow it to find out how old the fossil actually is using radioactive dating.
The element hydrogen has three naturally occurring isotopes, H-1, H-2, H-3. What is the number of protons, neutrons, and electrons in H-3, or tritium?
Answer:
Tritium is one of the three isotopes of hydrogen which contains 1 proton, 2 neutrons, and 1 electron. Out of three isotopes, protium is the most abundant isotopic form of hydrogen constituting about 99.98 % of total isotopic form.
Tritium is a radioactive isotope of hydrogen having a half-life period of 12.3 years which is produced as a byproduct of fission in a nuclear explosion. Naturally, it occurs in a very trace amount.
It emits the beta particle which is having very low energy so cannot penetrate the skin but can be hazardous if inhaled or get absorbed in the skin.
Which of the following statements about human impact on trees is true? a. Human activity always has a negative impact on trees. b. All human uses of trees require destruction of the trees. c. Human activity has had both a positive and negative impact on trees. d. Cutting down trees is the only activity that has a negative impact on trees.
i believe the answer is C
You are a scientist who discovers three new species of beetles in the jungles of South America. Describe, in detail, how a protein found in each of these beetles can be used to determine which species are more closely related ...?
The allele for a widow’s peak has complete dominance over the allele for a straight hairline (w). What is the probability of a man with a straight hairline (ww) and a woman with a widow’s peak (WW) having an offspring without a widow’s peak?
0 percent
75 percent
25 percent
50 percent
Option A is the correct answer.
D. 0 percent
Explanation:As the widow's peak is dominant over straight hairline (w). And the mother is homozygous recessive dominant for widow's peak. So, her all children receive one dominant W from their mom so they all will be having widow's peak.
Which of these is a hypothesis?salmon are kept in their natural habitat and treated with fungicides whenever infected.the yield of salmon is 2,000 kilograms in the month of april and 1,500 kilograms in the month of october.salmon are more prone to infections during the summer than in other seasons.?
Which of the following could be a nucleotide of DNA?
deoxyribose + phosphate group + thymine
deoxyribose + phosphate group + uracil
ribose + phosphate group + thymine
ribose + phosphate group + uracil
2. Which organelle acts like the “brain” or control center of the cell?
The term diffusion comes from a Latin term meaning "to spread apart." How is the term diffusion related to its Latin word of origin?
The term diffusion is related to its Latin word of origin, which means "to spread apart", as it describes the process where particles move from a region of higher concentration to a region of lower concentration. This movement results in the particles spreading out evenly throughout the available space.
Diffusion is a fundamental concept across various fields including biology, chemistry, and geography. In biology, diffusion is vital for cellular processes, for example, the transport of nutrients and waste products across cell membranes. It describes the passive movement of molecules traveling along the concentration gradient, eventually establishing equilibrium. In geography and social studies, diffusion refers to the spread of cultural traits, ideas, or technologies from one region or group to another. This can chart the progress of societal changes and technological advancements. The rate of diffusion is influenced by several factors such as temperature and the size of the diffusing molecules, or the nature and scale of the ideas being transmitted across populations.
what is the independent variable in this experiment
Answer: yes the expert is right
Explanation:
Final answer:
The independent variable is what the researcher manipulates in an experiment to see its effects on a dependent variable, such as applying different amounts of a new fertilizer to see its impact on plant growth.
Explanation:
The independent variable in an experimental study is the factor, property, or condition that the researcher manipulates or changes purposefully to explore its effects on a dependent variable. For example, if a researcher is testing the effects of a new fertilizer on plant growth, the type and amount of fertilizer applied (the treatment) would be the independent variable. The growth of the plants, which the researcher measures, would be the dependent variable. The researcher controls and changes the independent variable and then observes any changes in the dependent variable to determine the impact. In a typical experimental setup, the independent variable is introduced to the experimental group but not to the control group, which allows the researcher to compare the effects. It is crucial to hold all other factors constant so that any observed changes in the dependent variable can be attributed to the manipulation of the independent variable. For instance, using the previous example of plant growth, light, water, and soil conditions would need to be kept constant barring the fertilizer application.
Global warming is slowly melting the polar ice caps and glaciers, which are made up of freshwater. Marine organisms in which of the following zones of the ocean are going to be most affected by this process?
Organisms that live in the deep abyss of the ocean because the fresh water is more dense then the salt water and will sink to the bottom.
Organisms that live near the surface of the ocean because the freshwater is less dense then the salt water and will rise to the surface.
Organisms that live in the deep abyss of the ocean because the fresh water is less dense then the salt water and will rise to the surface.
Organisms that live near the surface of the ocean because the freshwater is more dense then the salt water and will sink to the bottom.
Answer:
d.
Because of this organisms at the surface will face different environment that might affect them.
Which statement is an accurate description of the relationship of rocks and minerals? A. All minerals are made of rocks. B. Geologically, minerals and rocks are exactly the same. C. Knowing which minerals are in a rock can help you identify and classify that rock. D. Almost all rocks are made of three or more minerals.
Final answer:
The relationship between rocks and minerals is that identifying the minerals within a rock helps to classify and identify it; rocks consist of minerals, which are their basic building blocks. So the correct option is C.
Explanation:
The question concerns the relationship between rocks and minerals in geology. The accurate description of this relationship is that knowing which minerals are in a rock can help identify and classify that rock. Rocks are aggregates of minerals, and most rocks are composed of a few common minerals, although some rocks are made up solely of one mineral. Minerals are the basic building blocks of rocks, and identifying the minerals within a rock is a fundamental skill for geologists. While seven common minerals make up 84% of the Earth's crust, there are over 5,000 known minerals that could be present in various types of rocks, including igneous, sedimentary, and metamorphic rocks.
_____are formed when two continental crust collide
Answer:
A mountain is formed.
Explanation:
Define corpus delicti
What disease causes an imbalance of the blood glucose levels
You visit a farm and notice that white chickens lay white eggs and colored chickens lay brown eggs, so you decide that only white chickens lay white eggs. What type of reasoning is this?
a) inductive
b) deductive
Answer
Inductive
Explanation
Its a logical process in which a number of premises all believed true or sometimes found true most of the time and combined to come up with specific conclusions. Its mostly used in applications that do involve behavior, forecasting and makes broader generalization that is considered probable. For example a speculation that all crows are black and each time a new crow is observed and found out that its black the assumption is increasingly confirmed. On the other hand if the crow is found not to be black then the assumption's found to be false..
Both the heart and arteries contract to pump blood throughout the body. true or false? True Both the heart and arteries contract to pump blood throughout the body. The heart contracts to move the blood flow through your arteries to the rest of the body
Answer:
TRUE
Explanation:
Loamy soil is ideal for gardening because it contains
Answer
mostly clay with very little silt or sand.
mostly silt with very little clay or sand.
roughly equal parts sand, clay, and silt.
mostly sand with very little clay or silt.
...?
Answer:
roughly equal parts sand, clay, and silt.
Explanation:
Loamy soil has an almost equal amount of silt, clay, and sand. Presence of an equal amount of soil particles of various size imparts enough pores to loamy soil to facilitate water drainage. Space between these soil particles help the plant roots to breath properly as ample of oxygen is present in spaces. Loamy soil does not allow the nutrients to run off as its clay component trap the nutrients.
hence, loamy soil has properties of sand, clay, and silt to support the plant growth which makes it ideal for gardening.
Transcribe the following DNA to RNA
DNA A G T C C T A T G A C C
mRNA ___________________________________
Characteristics we use to tell the difference between kinds of matter are called ____________ properties.
The blank would be physical
hope this helps have a great day
Locations in this region where major earthquakes occur are most closely associated with areas of
Final answer:
Major earthquakes are most closely associated with areas near tectonic plate boundaries, including the Pacific Ring of Fire, Mediterranean-Asiatic Belt, and regions where subduction occurs.
Explanation:
Locations where major earthquakes occur are most closely associated with areas near plate boundaries. Nearly 95% of all earthquakes take place along these boundaries, particularly around the Pacific Ring of Fire, which is known for a high incidence of earthquakes and volcanic activity. The Ring of Fire has convergent and transform boundaries and is home to most of the world's volcanoes. Another significant zone is the Mediterranean-Asiatic Belt, which experiences tectonic activity due to the Indian Plate colliding with the Eurasian Plate. Lastly, deep earthquakes in regions like northern Afghanistan are associated with the subduction process, where one tectonic plate is forced underneath another into the mantle.
Major earthquakes are not only concentrated directly on these boundaries but can also occur near them, on associated faults. Earthquakes are also common along divergent boundaries like mid-ocean ridges, and at transform faults such as the San Andreas Fault. Understanding the geologic setting of these regions is essential, as earthquake effects such as ground shaking, liquefaction, and landslides can significantly impact the local environments and human constructions within them.
Explain why molecules held together by covalent bonds don't have electrical charges
Why did Gregor Mendel conclude that the genes for flower and seed color in pea plants independently assorted even though both traits are on the same chromosome?
Crossing over occurred frequently.
The genes are not considered linked.
The genes are very far apart on the chromosome.
All of the above are correct.
A ____ is a heterogenous mixture in which the particles do not settle.
Sam noticed every time she rolled a ball on a flat surface it did not stop unless she
applied a force on it. This happened multiple times. The outcome never changed. Would you classify this as a law or theory? Why?
What is a place where poor woman and men worked separately for food from a Christmas Carol?
The question seems to be based on Charles Dickens' depictions of the harsh working conditions for men and women in factories during the Victorian era, though no specific place from 'A Christmas Carol' is mentioned. The conditions described are similar to those found in 'Hard Times' by Dickens, who used his work to provide social commentary on the injustices of the Industrial Revolution.
Explanation:The place mentioned in your question is not explicitly found in A Christmas Carol by Charles Dickens. Instead, it sounds like you’re asking about the working conditions depicted in Dickens' literature, such as in Hard Times, which describes the difficult lives of factory workers. In the Victorian era, which is when Dickens wrote, poor men and women often worked in factories under harsh conditions for very little pay.
The workers were segregated by gender and were subject to long hours, with meager food as part of their compensation. Women, in particular, faced additional challenges due to unequal pay and the likelihood of being sexually harassed or exploited.
These themes are common in Dickens’ work, which sought to highlight social injustices and the plight of the poor during the Industrial Revolution. While Dickens' novels are fiction, they provide important social commentary on the realities of the time, reflecting the poor living and working conditions, as well as the limited opportunities available to women, leading to some engaging in desperate measures such as 'treating' in order to survive.
Viruses living or non living
Competition occurs between species when _____.
they fight for mates
their niche is destroyed
they try to share the same niche
a new niche becomes available
Answer: The correct answer for the fill in the blank is- They try to share the same niche.
According to competitive exclusion principle, two species when present in the same area, try to compete for the same limiting resource like food. The species having better advantageous trait over the other survive and exclude the other one. In other words, the second species is either eliminated or shifts to some other niche.
This principle is also called Gause's principle.
Thus, competition occurs between two species when they try to share the same niche.
Answer:
they try to share the same niche
Explanation:
How can a mutation in DNA affect an organism?