A friend who is not taking your Biology course fills a cup with ice and then a drink. The friend asks you why the ice in the cup is floating, and you are able to say that Group of answer choices water vapor is less dense than liquid water. ice is denser than liquid water. convection currents caused by temperature differences push upwards on the ice. the molecules are closer together in ice than in liquid water. the molecules are farther apart in ice than in liquid water.
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Answer:
the molecules are farther apart in ice than in liquid water.
Explanation:
The correct answer would be that the molecules of water are farther apart in ice than in liquid water.
Water molecules in ice form are usually less dense than water molecules in liquid form. The water molecules in ice usually arrange themselves in a lattice form, unlike the random form in liquid water. This arrangement makes water molecules in ice to be more evenly spread out than in their liquid counterpart. Thus, ice is usually less dense than liquid water and will obey the principle of flotation by floating on water.
The ice in the cup is floating is due to: the molecules of water are farther apart in ice than in liquid water.
The density of a substance is the mass of the substance per unit of its volume. The formula to calculate the density is :
[tex]D = \frac{m}{v}[/tex], where D = density, m = mass of the substance, and v = volume
The density is the factor that determines if a substance will float or sink. The less-dense substance floats whereas, the more-dense object sinks.When water freezes to form ice then water molecules show expansion to create an open cage-like structure.This cage-like structure decreases the density of ice than the water so mass ice will have more volume as compared to liquid water.Thus, the ice floats on water - the molecules of water are farther apart in ice than in liquid water.
Learn more about the density:
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Related Questions
An amoeba moves out a large particles by what process?
Answers
Answer:
Exocytosis is the process by which a large number of molecules are released
How many capillary beds must a red blood cell pass through to move from an artery in the left arm to the left ventricle of the heart
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Answer:
two capillary beds
Explanation:
Capillary beds are networks of capillaries that supply blood to the organs and/or areas of the body, in which nutrients and gas exchange (i.e., O2 and CO2) between red blood cells and tissues take place. Smaller arteries (i.e., arterioles) diverge into capillary beds composed of 10 to 100 capillaries, the smallest blood vessels in the body that connect the arterioles and the venules. Red blood cells usually flow into a capillary bed from a metarteriole (i.e., a microvessel that connects arterioles and capillaries). Red blood cells sometimes pass through two capillary beds before reaching the heart. The left heart ventricle is a muscle required for pumping red O2-rich blood out through the aortic valve into the aorta, whereas arteries are large blood vessels that branch into arterioles in order to carry blood to the capillary beds.
True or false: Cellular microbes are often arranged in multicellular complexes with differentiated tissues.
Answers
Answer:
False
Explanation:
Drag the tiles to the boxes to form correct pairs.
Match the scenario with the type of weathering in action.
mechanical weathering
chemical weathering
biological Weathering
The root of a huge tree causes cracks in a rocky surface.
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Part of a cliff breaks and falls due to waves.
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Acid rain reacts with calcite present in limestone,
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Answer:
The root of a huge tree causes cracks in a rocky surface. ---> biological Weathering.
Part of a cliff breaks and falls due to waves. ----> mechanical weathering
Acid rain reacts with calcite present in limestone---> chemical weathering
Explanation:
The root of a huge tree causes cracks in a rocky surface is the example of biological Weathering because in this weathering living organism is involved. Part of a cliff breaks and falls due to waves of water is the example of mechanical weathering because water enters the small pores of rocks and formed cracks when expands. Acid rain reacts with calcite present in limestone is a chemical weathering because acid present in rain water is responsible for the degradation and breakdown of rocks.
Answer:
how it should loook
II. In the food that reaches stomach
a) Name one enzyme that could be
present in it.
b) Name a product of digestion that
could be present in it.
Pleaseeeeeeeeee(ᗒᗣᗕ)
Answers
Answer:
A) ans: Amylase – helps change starches into sugars. Amylase is found in saliva. Maltase – also found in saliva; breaks the sugar maltose into glucose. Maltose is found in foods such as potatoes, pasta, and beer.
b)ans:The chemical digestion of food is dependent on a whole range of hydrolase enzymes produced by the cells lining the gut as well as associated organs such as the pancreas.
When you did the Homeostasis Exercise Lab yesterday, what was the dependent variable?
A) Heart rate
B) Breathing rate
C) Both Heart rate and Breathing rate
D) Time
Answers
Help me please I really need this tomorrow
Answers
19. place moth balls in the closet and observe after several days.
20. whenever wax or a candle burns it turns from solid to liquid but again at room temperature it turns to solid
21. evaporation, condensation, precipitation
22. it produces new substances
23. vinegar Bubbles when baking soda is added
24. steam
Select the correct answer from each drop-down menu. Study the graphs, and then complete the passage. An anomaly in global temperature is a deviation from what is normal or expected. The graph shows that global atmospheric co2 ___(increased exponentially. Remained constant. Increased slightly)in the twenty-first century, and global temperature also increased during the same time. Based on the timeline, these statistics suggest a correlation between climate change and ___(wind energy production. Use of electric cars. Industrial carbon emissions). If the current trend of increasing co2 levels continues, the greenhouse effect will continue to ___(warm the planet. Release gas into space. Destroy carbon dioxide) .
Answers
Answer:
Increased exponentially
Industrial carbon emission
Warm the planet
Explanation:
The rapid increase in global CO2 in the 21st century has raised concerns over the lingering effect of global climate change which could result due to the exponential increase in CO2 emission at this time. This rise in global atmospheric CO2 has been observed to have a positive relationship with the level of industrial carbon emission. The rise in emission of industrial carbon has been tipped to be responsible for the exponential rise in global atmospheric CO2. CO2 is a form of green house gas responsible for warming the planet.
Answer:
An anomaly in global temperature is a deviation from what is normal or expected. The graph shows that global atmospheric co2 increased exponentially in the twenty-first century, and global temperature also increased during the same time. Based on the timeline, these statistics suggest a correlation between climate change and Industrial carbon emissions. If the current trend of increasing co2 levels continues, the greenhouse effect will continue to warm the planet.
Explanation:
Plato
Lee has difficulty seeing the board when he sits at the back of the class. The doctor tells him that he is short-sighted and requires spectacles (glasses).Explain what meant by ‘short-sightedness ‘and how spectacles are used to correct this problem.
it gon be obvious if you copy from g00 gle
Answers
10 differences between animal cells and plant cells
Answers
Answer:
Following are the difference to the given question:
Explanation:
Plant cells have a wall of a cell, while cells of animals wouldn't. Cell membranes offer plants support and shape.Chloroplasts in plant cells do not occur, however, in animal cells. Chloroplasts allow plants can grow things via photosynthesizing.Plant cells typically get a vacuole(s) that is one or even more big, whereas animal cells are vacuous, whether any.Large vesicles assist shape the plant and enable food and water to be store for future use.In animal cells, the storing function takes a smaller part and the vacuoles, therefore, are smaller.A plant cell is square in its structural way and an animal cell is often spherical and irregular.The cell of a plant has a vesicle in its big form which is significantly smaller than the plant cell, as well as the animal cell was the or more vacuoles. In general, a vacuole is a storage area for the cells to store water.There is no chloroplast inside the animal cell. Chloroplast is a plant cell that produces photosynthesis from its food. The plants have a green color.The nucleus is located throughout the cell of the plant on the other edge of the peripheral cytoplasm, while the nucleus is in the animal's core.Plant cells store food of starch while animal cells store food of glucose.The mitochondria in the plant are fewer and also have tube cristae, whereas the animal cells have grown in various.I need with this question please
Answers
C. The way the layer interacts with the layer below it.
write a report on storm around the world
Answers
Sweeping out from southeastern Missouri on March 18, 1925, the Tri-State Tornado careened across the southern tip of Illinois before dissipating in lower Indiana. Remarkably, these three locales lie 219 miles (352 kilometers) apart, and the tornado traveled this distance in just three and a half hours [source: SEMP].
The onslaught of destructive winds and heavy rainfall was unfortunately familiar to a region that recently suffered another Category 4 landfalling storm – Hurricane Eta – just two weeks earlier. Eta was a Category 4 storm with 140-mph winds when it landed in Nicaragua on Nov. 3 before ripping a wide path of destruction through Honduras and Guatemala.
Heavy rainfall from these two storm systems brought widespread flooding to the region, triggered large and numerous landslides in Guatemala and Honduras, and was responsible for numerous casualties.
NASA’s Earth Applied Sciences Disasters Program supports disaster response and risk reduction efforts throughout the world — before, during, and after disasters strike – and is working to aid Central America with the impacts from these storms.
In the case of Eta and Iota, the Program is using imagery and data from Earth-observing satellites to provide scientific analysis to Guatemala’s National Coordinator for Disaster Reduction and is working with the Coordination Center for Disaster Prevention in Central America. The multi-agency collaboration is assisting local governments in Nicaragua, Honduras and Guatemala, El Salvador, Belize, Costa Rica, and Panama. The Program is also working with U.S. Southern Command to provide situational awareness for potential emergency humanitarian assistance.
Interactive map
If we poke a plant and an animal cell ,which one of them would lose its shape?
Answers
Answer:
animal cell
Explanation:
hope this will help you
What can our nerves respond to?
Answers
They can respond to external stimuli
why animal-like organisms did not appear on Earth until after the first
organisms that could photosynthesise had appeared.
Answers
Answer:
800 million years ago , these clusters of specialized, cooperating cells eventually became the first animals, which DNA evidence suggests evolved around that time. Sponges were among the earliest animals.
The perimeter of a rectangle is 16 inches. The equation that represents the perimeter of the rectangle is 2 l plus 2 w equals 16, where l represents the length of the rectangle and w represents the width of the rectangle. Which value is possible for the length of the rectangle?
Answers
Answer:
The perimeter of a rectangle is 16 inches
Explanation:
The equation that represents the perimeter of the rectangle is 2l + 2w = 16, where l represents the length of the rectangle and w represents the width of the rectangle.
Which is found in both DNA and RNA?
A. thymine
B. uracil
C. adenine
D. ribose
Answers
Answer:
in DNA it is deoxyribose and in RNA it is ribose
Answer:
C. Adenine
Explanation:
DNA and RNA both have adenine, guanine, and cytosine.
DNA has thymine, which RNA does NOT have.
RNA has uracil, which DNA does NOT have.
It is difficult to define Primates according to the presence or absence of certain distinguishing anatomical or behavioral traits. What *really* defines Primates is that they all are descended from a single common ancestor approximately 65 million years ago.
Answers
Answer:
The correct answer is - true.
Explanation:
Primates are the third diverse group of mammals after rodents and bats. It is considered that it has diverged from other terrestrial mammals about 65 million years ago.
Defining and identifying the primates on the basis of certain anatomical and behavioral traits is not an easy task. There are almost 400 living species of primates are known.
Concerning the above image, what region of the eye contains rods/cones?
A) Sclera
B) Optic Nerve
C) Choroid
D) Retina
E) Other:
Answers
Answer:
Retina
Explanation:
The retina has rods and cones.
Rods help us see dim images and comes help us see bright and colored images.
What bone marking found on the second cervical vertebra projects superiorly into the anterior portion of the vertebral foramen of the atlas
Answers
Answer:
Odontoid Process
Explanation:
The Axis has a protuberance (process or projection) called the odontoid process. Where it joins the main body of the vertebra, it has a slight constriction or neck. It has an oval or nearly circular facet on its anterior surface for articulation with the anterior arch of the atlas.
Answer:
odontoid process that articulate with concave facet
Explanation:
the concave facet on the anterior arch or C1 to form the atlantoaxial articulation
what is circulatory system?
Answers
Answer:
the system that circulates blood and lymph through the body, consisting of the heart, blood vessels, blood, lymph, and the lymphatic vessels and glands.
Explanation:
¿Cuál es la molalidad de una disolución al mezclar 4 kg de agua como disolvente con 0,5 Mol de ácido clorhídrico (HCl) como soluto?
Answers
Answer:
La molalidad de la disolución es 0,125 molal.
Explanation:
En la teoría de las disoluciones químicas, la molalidad se define como la cantidad de moles del soluto dividida por la masa de solvente, entonces tenemos que la molalidad de la disolución descrita en el enunciado es:
[tex]m = \frac{0,5\,mol}{4\,kg}[/tex]
[tex]m = 0,125\,m[/tex]
La molalidad de la disolución es 0,125 molal.
Most body water comes from:moisture absorbed through the skin.fluids we drink.the food we eat.metabolism.
Answers
Answer:
fluids we drink.
Explanation:
Most body water comes from fluids we drink such as water, juices etc. Our body obtains water by absorbing it directly from the digestive tract. A small amount of water is produced in the metabolism of food particles. Our body loses excess amount of water by excreting it in the form of urine from the body. Kidney is the organ that filters waster materials and excess water from the blood and remove it from the body.
why some fruits have 1 seed and some gruits have many seeds
Answers
Answer:
Number of seeds in a fruit depends on the number of ovules in an ovary before fertilizations. The fruits which have more seeds in them have more number ovules in the ovary of flowers such as watermelon and those with single seed have only single ovule in the ovary of flowers like mango
Answer:
Number of seeds in a fruit depends on the number of ovules in an ovary before fertilisation. The fruits which have more seeds in them have more number ovules in the ovary of flowers such as watermelon and those with single seed have only single ovule in the ovary of flowers like mango.
a penny is tossed and comes up heads 7 out of 10 times. Is the probability that it will be heads on the next toss 70%? Why or not?
Answers
Answer:
I think it will because when you express 7/10 as a fraction it will result to 0.7, meaning the probability between 0 and 1 will be 0.7, therefore to express 0.7 as a fraction the answer will be 70%..
sorry if it's wrong
Which of the following statements describes the conditions of a pneumothorax? View Available Hint(s) Which of the following statements describes the conditions of a pneumothorax? The intrapulmonary pressure equalizes to atmospheric pressure. Both lungs partially or completely collapse. The intrapleural pressure decreases. The presence of air in the pleural cavity.
Answers
Answer:
The presence of air in the pleural cavity
Explanation:
A pneumothorax occurs when air builds up between the lung and the chest wall. In consequence, pneumothorax occurs when air gets into the pleural cavity (i.e., the space between the lung and the chest wall) and causes a fully and/or partially collapsed lung. Some of the most common symptoms of pneumothorax include shortness of breath (respiratory distress), rapid breathing, rapid heart rate, fatigue, agitation, dry cough, etc. Pneumothorax can be caused by a chest injury, an accident during a medical procedure, damage from underlying lung diseases, etc.
Earth’s continents are constantly in motion because they sit on top of gigantic plates which float on Earth’s mantle. Energy from the Earth’s core creates convection currents in the molten layer, and the currents move the plates. Over extremely long periods of time, this movement creates new _______.
a.
biomes
b.
plates
c.
atmospheric layers
d.
elements
Answers
Answer:
a. biomes
Explanation:
Ecology can be defined as the scientific study of the relationship between living organisms such as plants and animals in relation to their physical and biological environment.
An ecosystem can be defined as the natural living habitats of both living and non-living organisms, in which they interact with one another. Essential services such as plant pollination, water purification, nutrient cycling etc that are being provided by the ecosystem are really very vital, important and useful for the sustenance of life, both for humans and enhances social welfare.
Generally, the different continents on Earth are in a constant motion due to the fact that they're sitted on top of gigantic plates floating on Earth’s mantle.
Furthermore, the Earth’s core generate energy which also creates convection currents in the molten layer of the Earth, thereby, moving the plates.
Over an extremely long periods of time, the movement of these plates create new biomes.
In Ecology, a biome can be defined as a relatively distinct terrestrial region which is made up of animals, micrograms and plants, and it is typically characterized by similar environmental factors such as wind, relative humidity, rainfall, temperature, etc., irrespective (regardless) of where it occurs in the world.
There are five (5) main types of biomes and these are;
I. Forest.
II. Aquatic.
III. Desert.
IV. Grassland.
V. Tundra.
Answer:
A - Biomes
Explanation:
E2023
Carbohydrates are organic compounds containing chemical bonds used to power cellular processes. Sources of carbohydrates include: (select all that apply)
Answers
Answer:
Bread, beans, milk, popcorn, potatoes, cookies, spaghetti, soft drinks and corn etc.
Explanation:
Bread, beans, milk, popcorn, potatoes, cookies, spaghetti, soft drinks and corn etc are the main sources of carbohydrates. In these foods, carbohydrates are present in large amount which is a quick source of energy for us. The breakdown of carbohydrates starts from the mouth when the food mixes with saliva which contains an enzyme that starts breakdown of carbohydrates into micromolecules is called glucose that can be absorbed by our body for the production of ATP molecules.
"All honey flora are plants, but all plants are not honey flora". Justify.
Answers
Answer:
Beekeeping is affected by adverse climatic conditions and availability of floral resources. This study aimed to survey and characterize the flora in São João do Piauí, a semi-arid region in Piauí, Brazil, and to identify species providing resources to bees. Flowering plants were observed for 18 months, and records were taken of flowering date, growth habit, visitation and resources collected by bees. Melissopalinological analysis of honey produced in the area was performed. A total of 67 flowering plant species were recorded, of which 49 were considered as bee plants, with a predominance of herbs and shrubs. The low rainfall reduces the number of flowering species, which makes important the conservation and multiplication of species which bloom in dry season, such as Ipomoea glabra, Myracrodruon urundeuva, Sida cordifolia and Ziziphus joazeiro, as well as species that contribute to honey production such as Mimosa tenuiflora, Mesosphaerum suaveolens and Croton sonderianus.
Keywords:
nectar; pollen; floral resources
Cyanide inhibits cytochrome c oxidase, a component of the electron transport chain. If cyanide poisoning occurs, would you expect the pH of the intermembrane space to increase or decrease
Answers
Answer:
Increases.
Explanation:
The pH of the intermembrane space increases as the poisoning of cyanide occurs. After cyanide poisoning, the electron transport chain can stop pumping of electrons into the intermembrane space. The pH of the intermembrane space would increase, the pH gradient would also decreases, and ATP synthesis would stop to occur. The pH of the intermembrane space is neutral i.e. 7 but due to cyanide it move towards basic.
Answer:
Cyanide inhibits cytochrome c oxidase, a component of the electron transport chain. If cyanide poisoning occurs, the pH of the intermembrane space becomes more basic. The electron transport chain can no longer pump hydrogen ions into the intermembrane space and ATP synthesis stops.