1. A physical change occurs when the chemical composition of a substance does not change, but only its physical properties. An example of this would be melting ice. A chemical change occurs when the chemical composition of a substance is altered. An example of this would be the formation of rust from iron.
2. In order to answer this I would need to see what tests the question is referring to.
But you could find one physical change and one chemical and use something like this:
Test 1:
A physical change occurred in Test 1. This is supported by the fact that the substance retained its original chemical composition but changed its form.
Test 2:
A chemical change occurred in Test 2. This is supported by the fact that a new substance was created which had a different chemical composition than the original substance.
the____is the portion of earth that can support living things.
Answer:
The Biosphere
Explanation:
The biosphere is a thin life-supporting portion on Earth's surface, extending a few km into the atmosphere to the deep-sea. It is composed of living organisms and nonliving factors from which the organisms derive energy and nutrients.
pls help me I am rlly confused
All of an organism's characteristics are inheritable which evolves over millions of years. An example of this is the modern day horse's foot.
What is Evolution?This is referred to as the change in the heritable characteristics of biological populations over successive generations.
All an organism's characteristics can be inherited and evolves over a period of time as a result of the changing environmental conditions which helps them to adjust thereby increasing their chances of survival hence preventing extinction of species.
For example, over millions of years of evolution, many horses lost their side toes and developed a single hoof as a result of them needing to move at faster speeds to evade predators.
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Select the correct answer.
Which of the following conditions might prevent a dead body from going through the normal stages of lividity?
O A. muscular state
O B. weather conditions
O C.poisoning
OD.state of rigor mortis
O E.insect activity
Answer:
D. state of rigor mortis
Identify a dependent variable measured in the researcher’s experiment. Identify one control that the researcher could use to improve the validity of the experiment. Justify the researcher analyzing blood samples at many intermediate time points instead of at only the beginning and the end of the 20-week period.
Answer:
The dependent variable measured in the researcher’s experiment is the concentration of the drug in the blood samples. One control that the researcher could use to improve the validity of the experiment is to ensure that the same amount of the drug is administered to each participant.
Analyzing blood samples at many intermediate time points instead of at only the beginning and the end of the 20-week period allows the researcher to track changes in the concentration of the drug over time. This gives a more accurate picture of how the drug is metabolized by the body and how it affects the participants.
Explanation:
Which of the following science related statements are observations rather than opinions? Select all that apply.
The most frequent cause of coronary artery disease is the accumulation of fatty plaques in the arteries (atherosclerosis). Poor eating habits, inactivity, obesity, and smoking are risk factors. Choosing a healthy lifestyle can help reduce the risk of atherosclerosis. Thus option C, D is correct.
What are the most common heart disease?The most prevalent kind of heart disease, coronary heart disease, will claim 382,820 lives in 2020. 20.1 million adults aged 20 and older, or 7.2%, have CAD. Nearly 2 in 10 fatalities from CAD will occur in adults under the age of 65 in 2020.
Therefore, In the US, heart disease is the leading cause of death. Additionally, fewer bees have been visiting my garden lately, indicating that bee populations are declining.
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The given question is incomplete. Complete question is given below:
Which of the following science related statements are observations rather than opinions? Select all that apply.
Whaling should be banned.
Cancer is the worst of all diseases.
Ocean acidity was greater in 2010 than in 2000.
Heart disease is the major cause of death in the United States.
Fewer bees have been in my garden recently, so bee populations must be decreasing.
A. The boiling point of the water is 100°C. Where are 100 degrees Celsius?
Located
On the thermometer on the right?
HELP ME, PLEASE!!!
A. O ponto de ebulição da água é de 100°C. Onde estão 100 graus Celsius
localizados
no termômetro à direita?
ME AJUDEM POR FAVOR!!!
ASAP HELP!!!!! LIMITED TIME!!!!!!!!
What is one way that greenhouse gases are released into the
atmosphere?
Select one:
O Introducing non-native species into an environment
O Oil spills
O Littering
O Burning fossil fuels
Answer:
O Burning fossil fuels
Explanation:
Fossil fuel burning releases tons of CO2 which is a green house gas
The steepness of a line segment on a distance VS. time graph indicates which things about the motion of an object?
upward-sloping line segment: The steeper the slope, the faster the motion.
downward-sloping line segment: The steeper the slope, the faster the motion.
upward-sloping line segment: The steeper the slope, the slower the motion.
downward-sloping line segment: The steeper the slope, the slower the motion.
upward-sloping line segment: The steeper the slope, the slower the motion.
downward-sloping line segment: The steeper the slope, the faster the motion.
•
upward-sloping line segment: The steeper the slope, the faster the motion.
downward-sloping line segment: The steeper the slope, the slower the motion.
Explanation:
answer to the question of how you can find the answer is by finding the answer
Wisdom teeth are the third and final set of human molars that come in during the late teens or early twenties. In some cases, these teeth come in without problems, but they often have to be removed due to misalignment in the jaw, as shown below. Removal of the teeth does not cause any long-term complications in regard to eating.
An x-ray image of the mouth.
Which type of anatomic structure are wisdom teeth?
Answer:
They are considered to be vestigial structures.
Parasitic worm infestation
6. Which process is most responsible for the
formation of sand dunes?
A water erosion
В volcanism
C wind erosion
D glaciation
Answer:
C wind erosion is most responsible for the formation of sand dunes.
Explanation:
Sand dunes are formed when wind blows loose sand from a beach, desert, or other location, and deposits it in a new location. The sand is then shaped by the wind into dunes, which can vary in size and shape depending on the strength and direction of the wind. Water erosion, volcanism, and glaciation can all also contribute to the formation of sand dunes to some extent, but wind erosion is typically the primary process responsible for their formation.
explain how energy carried by a light and sound wave with those properties
The fact that both light & sound are waves of energy is among the most crucial things to comprehend about both.While sound waves & light waves both travel as waves and are manifestations of energy, they differ significantly in important ways.Light and sound travel at very different rates.
How are the energies of sound and light similar?Both light and sound energy travel as waves, which is how they are comparable to one another.They have such a wavelength, amplitude, and frequency, to put it another way.
How do light & sound waves connect to energy?The fact that both light & sound are waves of energy is among the most crucial things to comprehend about both.
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6. Use your understanding of the Big Idea to explain which cell below converts the most food into energy and why. Justify your answer
Answer:
The plant cell converts the most food into energy because it contains chloroplasts, which are organelles that are responsible for photosynthesis. Photosynthesis is the process in which plants use light energy from the sun to convert carbon dioxide and water into glucose. This glucose is then used as an energy source for the cell. The other cells do not contain chloroplasts and therefore cannot conduct photosynthesis, so they are not able to convert as much food into energy.
Explanation:
The sample of DNA below is being analyzed to determine if a patient has
the genetic disorder. DNA sequence:3' CAA-TCG-CGG-TCT-CTT 5'.
Determine the mRNA sequence from the patient's DNA sequence.
If the sample of DNA below is being analyzed to determine if a patient has the genetic disorder and this DNA sequence is 3' CAA TCG CGG TCT CTT 5', then the mRNA sequence from the patient's DNA sequence is GUU AGC GCC AGA GAA.
What is the cell process of genetic transcription?The cell process of genetic transcription refers to the generation of a complementary strand of RNA from a DNA template chain, which may be a fragment of a sequence and the resulting mRNA can then be used to produce a protein by another cell process called translation.
Therefore, with this data, we can see that the cell process of genetic transcription is based on the generation of a complementary RNA strand by using a DNA sequence template such as for example the coding region of a gene.
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Which statement describes an environmental consequence of sustainable land use?
Building a park instead of more housing may be unpopular with residents.
When common lands are protected, land degradation slowly disappears.
Residents praise community leaders for preserving land for a new park.
If common land use is restricted, it can slow down the economy.
The statement that describes an environmental consequence of sustainable land use is that If common land use is restricted, it can slow down the economy. That is option D.
What is sustainable land use?Sustainable land use ensures the fair and balanced distribution of land, water, biodiversity and other environmental resources among the various competing demands to meet current and future human needs.
Therefore, although the practice of sustainable land use is important, it can slow down the economy of the country as there would be decrease in competition in land space used for agricultural production.
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Which term defines a well-supported, explanation of an occurrence of a natural phenomenon?
Ο Α.
OB.
O c.
O D.
hypothesis
bias
observation
theory
Answer:
A theory.
Explanation:
A theory is an explanation that has been supported by reliable and valid evidence. It is the most well-supported explanation of an occurrence of a natural phenomenon.
Why is PTC important to be passed on in animals and humans?
Answer:
PTC (phenylthiocarbamide) is important to be passed on in animals and humans because it is a gene that determines the ability to taste certain bitter compounds. This gene helps to determine which foods are safe to eat, as some bitter compounds are toxic and can be dangerous if consumed.
Explanation:
An enzyme called tyrosinase produced the dark compound in skin (melanin). I’m albinism, this enzyme does not work or is not present. Explain how each mutation could be responsible for Albinism.
The enzyme called tyrosinase produced the dark compound in the skin (melanin) but in albinism, this enzyme does not work or is not present, thereby this mutation could be responsible for Albinism because this phenomenon alters the molecular signaling pathway involved in the synthesis of skin pigments.
What is the relationship between genetic mutations and the alteration of signaling molecular pathways?The relationship between genetic mutations and the alteration of signaling molecular pathways is based on the fact that alteration in the genetic material can lead to defective proteins involved in a signaling network, thereby altering the final outcome of the pathway.
Therefore, with this data, we can see that the relationship between genetic mutations and the alteration of signaling molecular pathways is based on the molecular mechanisms that are altered during the generation of a phenotypic feature such as in this case skin pigmentation.
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what sensors in the past points out the similarity between parthenogenesis and sexual reproduction
The similarity between parthenogenesis and sexual reproduction is “Parthenogenesis involves the formation of a zygote”
How is parthenogenesis similar to sexual reproduction?This method is alike to the fusion of an egg and sperm in sexual reproduction since it shapes a diploid nucleus from the fusion of two dissimilar cells. The resulting offspring is a homozygote and gets about half of its mother's genetic disparity. This type of parthenogenesis could make either a female or a male.
Komodo dragons are a sample of a species that can produce offspring both through sexual reproduction and parthenogenesis.
So we can conclude that Parthenogenesis in humans never make viable embryos,
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Which bases are found in In 1953, who developed the model that is shown below?a strand of DNA?
The person that developed the model are James Watson and Francis Crick. The bases are found in In 1953 are: adenine, cytosine, guanine, and thymine.
What is the DNA bases?In 1953, James Watson and Francis Crick developed the model of the structure of DNA, which is shown in the image below. The model, known as the double helix, consists of two strands of DNA that are coiled around each other.
Hence, DNA is made up of four bases: adenine (A), cytosine (C), guanine (G), and thymine (T). These bases pair up with each other in specific ways: A pairs with T, and C pairs with G. The sequence of these bases on a DNA strand carries genetic information, and the specific order of the bases determines the genetic code for an organism.
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7. Photosynthesis is impossible at a depth of 1000 m because: A it is too hot B only blue light penetrates this far C no light penetrates this far D it is too cold 8. Which of the following is not true about the viscosity of water? A if it were more viscous the heart would not be able to move the blood through the blood vessels B if it were less viscous the organelles would not be suspended in the cytoplasm C if it were less viscous the heart would not be able to move blood through the blood vessels D if it were more viscous the organelles would be damaged in the cytoplasm 9. The high surface tension of water is due to: A unbalanced hydrogen bonding in the body of the water B balanced hydrogen bonding in the body of the water C balanced hydrogen bonding at the surface of the water D unbalanced hydrogen bonding at the surface of the water 10. One benefit of ice being less dense than water is: A water freezes from the top down and water is insulated under the ice B water freezes from the top down and the water under the ice is cooled more quickly C water freezes from the bottom up and the remaining water cools more slowly D water freezes from the bottom up and the remaining water cools more quickly
Answer:
bh
Explanation:
Answer: The answer for 7 is C no light penetrates that far
8 d
9 D
10 A
Explanation:
Some adaptations are helpful in one environment,but would be harmful in other environments .complete the table below with 5 more adaptations.
Adaptations are changes that a species makes in order to better survive in its environment.
What do you mean by environment?
Environment is the natural world and all of the living creatures in it. It includes the air, land, water, plants, and animals. It also includes the physical, chemical, and biological processes that occur in and around these elements. Humans are also part of this environment and have an impact on it.
adaptation helpful environment harmful environment
thick fur cold, arctic environment hot environment
webbed feet swimming in water running on land
sharp claws climbing trees open fields
long neck reaching food in tall trees small, enclosed spaces
long legs savanna environment deep water environment
horns defense and protection in fights tight spaces
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In addition to movement, arthropod appendages can be used
for
a feeding
b defense
c sensory reception
d all of the above
In addition to movement, arthropod appendages can be used for 'all of the above'.
What do you mean by arthropod appendages?
Arthropod appendages refer to the jointed legs, antennae, mouthparts, and other body parts of arthropods, such as insects, crustaceans, arachnids, and centipedes. These appendages are adapted for a variety of functions, such as locomotion, sensing the environment, and manipulating food and objects.
Arthropod appendages can be used for a variety of functions, including movement, feeding, defense, and sensory reception. They are equipped with various organs, such as antennae and mouthparts, that allow them to perform a variety of tasks.
Hence, option D is correct.
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What is the answer for Tia makes a model of a glacier with clay, sand, and an ice cube. She pushes the ice cube over the clay that is covered with sand. Explain how she could use the model to show that glaciers carry soil.
The model prepared by Tia could be used to show the glaciers which carry soil as similar to the clay which carries the ice cubes and sand, the glaciers also carry various materials along with them.
What are Glaciers?A glacier is a persistent body of dense ice and other materials that is constantly moving under its own weight and force. A glacier forms where the accumulation of snow exceeds the ablation over the period of many years, often centuries.
Glaciers acquire the distinguishing features, such as crevasses and seracs, as it slowly undergoes flow and deforms under the stresses which are induced by its own weight. As it moves constantly, it abrades rocks and debris from its substrate to create the major landforms such as cirques, moraines, or fjords. Although a glacier may flow into a waterbody, it forms only on the land surface and is distinct from that of much thinner sea ice and lake ice which form on the surface of bodies of water.
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Which process usually results in offspring that exhibit new genetic variations
Answer:
A
Explanation:
A shows process of fertilization where sperm and egg meet to form zygote which is genetically different than sperm or the egg.
(RrYy x RrYy), how many of the offspring will be dominant for both traits?
9 of the offsprings will be dominant for both traits in the above dihybrid cross.
What is a dihybrid cross?A dihybrid cross is a cross between two individuals with two observed traits that are controlled by two distinct genes.
Gregor Johann Mendel known as the father of genetics was the first person to discover the basic principles of heredity during the mid-19th century.
In a dihybrid cross between two parents that are heterozygous for both traits, the cross will result in four different combinations of seeds in the F2 generation as follows:
wrinkled-yellow round-yellowwrinkled-greenround-greenThese offsprings are in the phenotypic ratio of 9:3:3:1 where 9 represents the offsprings dominant for both traits.
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4. Carla placed three identical plants on a
sunny windowsill. Using the same amount
of water each time, she watered one plant
twice a day. She watered the second plant
once a week. She did not water the third
plant. After three weeks, she found that the
plant watered once a week was thriving.
The plant that was watered twice a day
was dying. The plant that was not watered
was brown and dead. What conclusion can
Carla draw?
A. Water causes plants to die
B. Plants need a certain amount of water to live
C. Plants should not be placed on sunny windowsills
D. Plants do not live very long
The conclusion is that plants need a certain amount of water to live. Therefore, option B is correct.
What is the effect of water on the life of a plant?Water is a very important factor that affects the life of a plant. Water is required by plants to perform photosynthesis, through which they make food. If a certain amount of water does not available for plants then they will dry due to lack of food.
It is also required for the cooling and transportation of minerals and nutrients in the plant.
Plants need a certain amount of water to live. Therefore, option B is correct.
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what are the main biome elephants are found, an ecosystem and four other types of biomes.
Answer:
Elephants are mainly found in savanna biomes, grassland ecosystems, tropical rainforest biomes, desert biomes, tundra biomes, and temperate deciduous forest biomes.
Explanation:
Many years ago, scientists
considered sponges to belong to Kingdom Plantae. What sort of evidence convinced them that sponges belonged to Kingdom Animalia?
1. What does this system do?
lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, exhalation
What does respiratory system do?The functions of the respiratory system include gas exchange, acid-base balance, phonation, pulmonary defense and metabolism, and handling of bioactive materials.
The respiratory system is responsible for obtaining oxygen and getting rid of carbon dioxide and aiding in the speech production and in sensing odors.
parts of respiratory system:
Nose
Mouth
Throat (pharynx)
Voice box (larynx)
Windpipe (trachea)
Airways (bronchi)
Lungs
Most living things need the oxygen to survive. Oxygen helps organisms grow, reproduce, and turn food into the energy. Humans get oxygen they need by breathing through their nose and mouth into their lungs. Oxygen gives our cells ability to break down food in order to get the energy we need to survive.
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The complete question is :
What does the respiratory system do ?