Answers
Answer:
Lighting a match.
Explanation:
When the match burns it goes through a chemical change due to the materials such as phosphate, sulfur, etc. The heat then burns the phosphorous on the match's head.
Sorry if it didn't make sense.
Answer:
Lighting a match
Explanation:
Lighting a match and letting is burn is an example of a chemical change because the two reactants (fire and the match) form a new substance. Freezing water, melting ice and crushing a rock are physical changes because they only change in size, shape or form.
Related Questions
Why were Indians against building the Klamath river dam?
Answers
Explanation:
Un-Dam the Klamath (#UnDamtheKlamath) is a social movement in the United States to remove the dams on the Klamath River primarily because they obstruct salmon, steelhead, and other species from accessing the upper basin which provides hundreds of miles of spawning habitat. The dams have also significantly harmed Hupa, Karuk, Klamath, and Yurok lifeways and communities. Copco #1, Copco #2, Iron Gate (all in California) and J.C. Boyle (in Oregon) are the four hydroelectric dams on the Klamath River that are being advocated for removal.what are bioactive molecules
Answers
Answer:
Bio-active molecules that are basically molecules that are which is produced as a result of microbial activities. These molecules can be in different forms such as enzymes, chemical compounds and organic acids. Some examples are proteases, streptokinases, lipases and pectinases.
I hope this helps you
What is the phenotype for the female mouse
Answers
Answer:
Behavior, biological features, color, form, and size are a few examples of visible traits.
Explanation:
All of an organism's observable traits, or phenotype, are the outcome of the interplay between its genotype (total genetic inheritance) and environment.
answer the question please
Answers
The terms that are associated with the shaded area (red) around the Pacific Ocean, which includes El Misti, Lassen Peak, Mt. Fuji, and Tarawera are: Ring of Fire, Volcanoes, and Subduction
What is the Pacific Ring of Fire?The Pacific Ring of Fire is an area around the Pacific Ocean where many active volcanoes and earthquakes occur.
It is called the "Ring of Fire" because it is shaped like a horseshoe or ring and includes countries such as Japan, the Philippines, Indonesia, the United States, and Chile.
This area is characterized by frequent volcanic eruptions and earthquakes due to the movement and collision of tectonic plates.
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Complete question:
Select all of the terms that are associated with the shaded area (red) around the Pacific Ocean, that includes El Misti, Lassen Peak, Mt. Fuji, and Tarawera.
Ring of Fire
Divergent Boundary
Volcanoes
Hot Spot
Subduction
in cats, short hair is dominant over long hair. A cat with a heterozygous genotype for hair length is crossed with a cat with a homozygous recessive genotype.
What is the probability that an offspring will have the homozygous recessive genotype?
PLEASE HURRY
Answers
The probability that an offspring will have the homozygous recessive genotype is 0.5 or 50%. Correct Option is A) 0.50
In cats, short hair (S) is dominant over long hair (s). A cat with a heterozygous genotype for hair length (Ss) is crossed with a cat with a homozygous recessive genotype (ss).When these cats are crossed, there are two possible genotypes for the offspring: Ss (short hair) and ss (long hair). The probability of the offspring having the homozygous recessive genotype (ss) can be determined using a Punnett square.In this case, when the heterozygous cat (Ss) is crossed with the homozygous recessive cat (ss), the possible genotypes of the offspring are Ss and ss. Since the homozygous recessive genotype (ss) can only be obtained when both alleles contributed by the heterozygous parent are the recessive allele (s), the probability of an offspring having the homozygous recessive genotype is 50% or 0.5.Therefore, the probability that an offspring will have the homozygous recessive genotype for hair length is 0.5 or 50%.For more questions on probability
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Describe what the results would look like if the data supports your hypothesis.
Answers
Answer:
Please see below
Explanation:
In such a case, the data will indicate a positive trend towards the outcome predicted in the dependent variable. However, the data has to show a significant difference (as indicated by p value) between the measured variables for it to be a valid support of the hypothesis.
Hii please help me...
Answers
Which of the following is NOT correct?
Group of answer choices
tetracyclines bind to ribosomes and inhibit protein synthesis
sulfonamides inhibit folic acid synthesis
bacitracin inhibits ATP synthase and block energy production
quinolones inhibit DNA replication
rifampins (rifamycin) inhibit RNA transcription
Answers
Answer:
sulfonamides inhibit folic acid synthesis
Explanation:
sorry if wrong
Within a population, the different colors and patterns of eyes are _____. A. the results of chance mutations B. reflections of the colors in the environment C. produced in anticipation of environmental forces D. created by the environmental effects on the phenotype
Answers
Answer: the correct option is B.
reflections of the colors in the environment
Explanation:
This is because the environment causes different reflections of color. Fir example white light reflect colors, it will absorb all other colors except with.
The environment serves a a medium for color reflection and this has lead to different color and patterns in population. People have eye pattern and color base on their surrondings, what the surronding is made off influence the color and patterns.
The Arizona poppy has adapted to living in areas that receive less rain, but there are still periods of time that a drought occurs. What part(s) of photosynthesis would the plant not be able to perform if there is no rain? What would be the long-term effects on the plant if the drought were to continue? Explain your answer.
Answers
If there is no rain, the Arizona poppy would not be able to perform the light-dependent reactions of photosynthesis.
What are the stages of photosynthesis?Photosynthesis is a process that involves two main stages: light-dependent reactions and light-independent reactions.
Water is required in the light-dependent reactions to provide the electrons that are needed to generate ATP and NADPH, which are then used in the light-independent reactions to produce glucose.
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What are Bald eagle homologous structures
Answers
The wing of a bald eagle is homologous to the wing of a penguin. Homologous structures are structures that are of similar evolutionary origin.
How do we explain?Homologous structures are described as anatomical features found in different species that have a common evolutionary origin. These structures may have different functions in different organisms, but they share a similar underlying structure and can be traced back to a common ancestor.
The wing of a bald eagle and the wing of a penguin are considered homologous structures because they both evolved from a common ancestral structure, even though they serve different purposes which is flight in the case of the bald eagle and swimming in the case of the penguin.
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What does a prism do?
Answers
Answer:
Q: What does a prism do?
A: A prism could be used for different things. Like color prisms reflect light and creates colors like red, green, orange, blue and purple. Also called spectrum. If you need to know how that happens, well the prism bends and reflect off the prism. This is because of the density of the glass. Hope this is what you were looking for!
What are the 2 body systems? (View Image)
Answers
Answer:
Immune system, and respiratory system.
Explanation:
Consider the following population:
Blood Type A B AB O
Number of individuals 533 84 67 316
What is the frequency of the IB allele in this population?
Answers
Answer:
0.079
Explanation:
Using Hardy Weinberg equilibrium for blood group;
p² + 2pq + q² + 2pr + r² + 2qr = 1
where;
p = allele frequency for A
q = allele frequency for B
r = allele frequency for O
N(p² + 2pr) = the number of allele for type A people
N(q² + 2qr) = the number of allele for type B people
N(2pq) = the number of allele for AB people
N(r²) = the number of allele for O people
N(r²) = 316
r² = 316/1000
r² = 0.316
r = \(\sqrt{0.316\)
r = 0.56
To find the frequency of the \(I^B\) allele;
N(q² + 2qr) = 84
q² + 2qr = 84/1000
q² + 2qr = 0.084
where;
r = 0.56
q² + 2q(0.56) = 0.084
q² + 1.12q = 0.084
q² + 1.12q - 0.084 = 0
Using the quadratic formula:
\(=\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}\)
where;
a = 1, b = 1.12, c = -0.084
\(=\dfrac{-(1.12) \pm \sqrt{(1.12)^2-4(1)(-0.084)}}{2\times 1}\)
\(=\dfrac{-(1.12) \pm \sqrt{1.2544-(-0.336)}}{2}\)
\(=\dfrac{-(1.12) \pm \sqrt{1.5904}}{2}\)
\(=\dfrac{-(1.12) \pm 1.261}{2}\)
\(=\dfrac{-(1.12) + 1.261}{2} \ \ OR \ \ \dfrac{-(1.12) - 1.261}{2}\)
\(=\dfrac{0.141}{2} \ \ OR \ \ \dfrac{-2.381}{2}\)
\(\simeq 0.079 \ \ OR \ \ -1.1905\)
Since our value can be negative; then the frequency of the \(I^B\) allele in this population is 0.079.
In an ECG pattern, the P wave is caused by?
Answers
Answer:
Depolarization of atrial muscle fibers
The P wave in an electrocardiogram (ECG) pattern is caused by the depolarization (contraction) of the atria.
What does this represent?It represents the electrical activity that initiates the contraction of the atrial muscles, which is responsible for pumping blood into the ventricles.
The depolarization wave starts at the sinoatrial (SA) node, also known as the natural pacemaker of the heart, and spreads throughout the atria, leading to their contraction.
The P wave is the first deflection seen on an ECG and signifies the initiation of the cardiac electrical cycle. It provides valuable information about the atrial function and can help diagnose certain cardiac conditions.
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Why is it important that blood donors have their blood counts taken?
Answers
Answer:
to see if you have certain infectious diseases you can pass on
Explanation:
For a molecule of glucose to be converted into an amino acid, which of these events must occur?
A. Anitrogen atom must be added to a carbon chain.
B. A phosphorus atom must be removed from a carbon chain.
C. A hydrogen atom must be added to a carbon chain.
D. Two carbon atoms must be joined together.
Answers
Answer:
. An nitrogen atom must be added to a carbon chain.
How can color be use in balance?
Answers
Answer:
Color balance changes the overall mixture of colors in an image and is used for color correction. Generalized versions of color balance are used to correct colors other than neutrals or to deliberately change them for effect.
Explanation:
Which series orders organisms from those with the greatest amount of energy available to them to
those with the least amount of energy available to them?
secondary consumer, primary consumer, producer
producer, secondary consumer, primary consumer
primary consumer, secondary consumer, producer
producer, primary consumer, secondary consumer
Answers
Answer:
producer, primary consumer, secondary consumer
A food chain contains four trophic levels. The top-most level contains about 300 J of biomass. How much biomass (in J) do you expect to find in the bottom (i.e. primary producer) trophic level?
Group of answer choices
30,000
3,000,000
300,000
300
30
Answers
\( \huge \underline \mathtt \colorbox{cyan}{300,000J}\)
Explanation:
According to the 10% rule
Top (predators)= 300J
Omnivores(secondary)= 3,000J
Herbivores(primary)= 30,000J
Plants(producers)= 300,000J
A food chain contains four trophic levels; the top-most level contains about 300 J of biomass, so the amount of biomass (in J) one would expect to find in the bottom (i.e., primary producer) trophic level is 300,000, which is the third option.
What exactly is the 10% rule?There is a 10% energy transfer between each trophic level, which states that only 10% of the energy in one trophic level is passed on to the next trophic level, while 90% of the energy is lost as heat or used for metabolic processes, so there are four levels where the uppermost level has 300 joules. then the lower trophic level, which is the third level, contains 3000 joules, the second would contain 30000 joules, and the primary would contain 300000 joules.
Hence, the top-most level contains about 300 J of biomass, so the amount of biomass (in J) one would expect to find in the bottom (i.e., primary producer) trophic level is 300,000, which is the third option.
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________is the primary source of energy for most ecosystems.
Answers
Answer:
The sun
Explanation:
Hope this helps :)
hello help me with this question thanks in advance don't spam
Answers
Answer:
Explanation:
Advantages to community:
1. Geothermal energy is a renewable energy resource because heat extracted is very small compared to the Earth's heat content.
2. It is reliable and constant source of energy as it can extracted all through the year despite changing weather patterns.
3. Geothermal energy is widely available and it creates new job opportunity.
Disadvantages:
1. Cost of installation of geothermal heat pumps are high.
2. This power plants plants are suitable to particular region and they are far from cities.
Advantage to the environment:
1. It is echo friendly and non-polluting from production to use.
2. Geothermal plants occupy a less space, no-mining or no transportation is require and thus protects the natural environment.
3. There is no wastage or by -products.
Disadvantage:
1. This power plants may trigger earthquakes.
2. Power plant uses lot of water in its processes.
Use a diagram to show how ions are formed when a sodium atom comes into close contact with a chlorine atom
Answers
Which of the following is an abiotic limiting factor for a plant population in an ecosystem?
Invasive weed species
Animals pollinating flowers
Availability of soil minerals
Disease-causing fungal spores
Answers
Answer:
Availability of soil minerals
Explanation:
Abiotic factors are the non-living factors in the ecosystem. These materials are the chemical and physical components of the ecosystem. They are not biological in nature.
Soil minerals are abiotic since they are produced from rocks. Invasive weed species, animals pollinating and disease causing fungal spores are all biotic. They stem from biological processes.Answer:
Availability of soil minerals
Explanation:
Hope it helps!
Lab Report PLEASE HELP ME
Introduction
1. What was the purpose of the experiment?
2. What were the independent, dependent, and control variables in your investigation?
3. Write a hypothesis based on observations and scientific principles.
Experimental Methods
1. What tools did you use to collect your data?
2. Describe the procedure that you followed to conduct your experiment.
Data and Observations
1. Record your observations. Include the data table you created for the lab and a graph based on the data table.
Conclusions
1. What conclusions can you draw about the relationship between the temperature of a ball and its bounce height? Is there a direct or inverse relationship? Write an evidence-based claim.
2. What are some sources of error in your experiment? What are some ways that you could improve the accuracy and precision of the measurements?
Answers
Answer: Introduction
What was the purpose of the experiment?
Type your answer here: Hypotheses are ideas based on reasoning and can tested in an experiment.
• What were the independent, dependent, and control variables in your investigation?
Type your answer here: The independent is the variable you change, The dependent variable is the variable you observe to determine the impact of the independent variable, and control variable is the constant, which is something that is assigned a value, and it will not change in the experiment.
Write a hypothesis based on observations and scientific principles.
Type your answer here: In an experiment, scientists test a hypothesis by changing and observing variables. A variable is a condition that may change. In an experiment, you usually change one variable to see how it affects another variable.
Experimental Methods
• What tools did you use to collect your data?
Type your answer here: Data can include measurements, such as the temperature of a mixture, or observations, such as the color of a substance. Data are used as evidence, Scientists collect data to determine whether the information coming from their experiments supports their hypotheses. Think of data as evidence. Data collected during the experiment are used as evidence to support or refute a hypothesis.
• Describe the procedure that you followed to conduct your experiment.
Type your answer here: Create a graph, label the axes , add tick marks, add data points,
Data and Observations
• Record your observations. Include the data table you created for the lab and a graph based on the data table.
Type your answer here: Data collection tools refer to the instruments used to collect data, such as a paper questionnaire or computer-assisted interviewing system. Case Studies, Checklists, Interviews, Observation sometimes, and Surveys or Questionnaires are all tools used to collect data.
Conclusions
• What conclusions can you draw about the relationship between the temperature of a ball and its bounce height? Is there a direct or inverse relationship? Write an evidence-based claim.
Type your answer here: Pressure is directly proportional to temperature when the volume is constant. This means that an increase in temperature will lead to an increase in pressure. Now, Pressure is Force/Area and so the higher the air pressure, the higher will be the force on the ball and consequently, the higher the ball will bounce. Likewise, the lower the temperature, the lower the pressure and thus the lower the height at which the ball will bounce. This means, we can conclude that since temperature is directly proportional to pressure and pressure is directly proportional to the height of bounce of the ball, the temperature of the ball is directly proportional to its bounce height.
• What are some sources of error in your experiment? What are some ways that you could improve the accuracy and precision of the measurements?
Type your answer here: All experiments are subject to various types of errors or variations. Even our spring experiment, although it was a simulation and really simple, relied on you making accurate measurements. If someone else did it, they might get slightly different results. In the real world there are many sources of error.
• The functioning of laboratory equipment may vary.
• Measuring devices may have limits to their capabilities.
• Other factors, such as the temperature and humidity of the room, might influence measurements and equipment.
Explanation:
How does meiosis differ from mitosis?
1) it decreases the amount of cells.
2) it increases a lot of DNA.
3) it reduces the amount of DNA
4) and increases the number of cells.
Answers
Answer: Cells divide and reproduce in two ways, mitosis and meiosis. Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells. Below we highlight the keys differences and similarities between the two types of cell division.
I think its choice 4 :)
Explanation: Used a science book! :)
Answer:
4. It increases the number of cells.
Explanation:
Carbon compounds move from plants to animals via the process of _____.
Answers
Answer:
photosynthesis
Explanation:
Through the process of photosynthesis, carbon dioxide is pulled from the air to produce food made from carbon for plant growth. Carbon moves from plants to animals. Through food chains, the carbon that is in plants moves to the animals that eat them. Animals that eat other animals get the carbon from their food too.
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Answer:
ingestion (eating)
9 Random copolymers were used in some of the experiments that revealed the characteristics of the genetic code. For each of the following ribonucleotide mixtures, give the expected codons and their frequencies, and give the expected proportions of the amino acids that would be found in a polypeptide directed by the copolymer in a cell-free protein-synthesizing system:
a. 4a: 6c
b. 4G: 1C
c. 1A: 3U: 1C
d. 1A: 1U: 1C: 1G
Answers
A
Hope this helped Happy spring and happy almost summers
Why is sand irritating
Answers
Answer:
I believe because it is made up of very small particles that it's texture is naturally rough and coarse. In addition, when having to get rid of sand from your foot or in your shoe, it is tedious and a bit difficult to get rid of it completely
which of the following terms is used to describe a structure made up of two or more tissues organized to perform a certain function?
choose 1 answer:
(A) organ
(B) organ system
(C) cell