Explanation:
Water as a Compound and Molecule
A compound forms whenever two or more atoms form chemical bonds with each other. The chemical formula for water is H2O, which means each molecule of water consists of one oxygen atom chemically bonded to two hydrogen atoms. Thus, water is a compound. It's also a molecule, which is any chemical species formed by two or more atoms chemically bonded to each other. The terms "molecule" and "compound" mean the same thing and can be used interchangeably.
Sometimes confusion arises because the definitions of molecule and compound haven't always been so clear-cut. In the past, some schools taught that molecules consisted of atoms bonded via covalent chemical bonds, while compounds were formed via ionic bonds. The hydrogen and oxygen atoms in water are covalently bonded, so under these older definitions, water would be a molecule but not a compound. An example of a compound would be table salt, NaCl. However, as scientists came to understand chemical bonding better, the line between ionic and covalent bonds became fuzzier.
Answer: water is a polar molecule
Explanation: water H2O has two covalent bonds between Oxygen and Hydrogen atoms. Both are non-metals and share outer electrons for forming a covalent bond.
Oxygen has much greater electronegativity and it pulls shared electrons with greater force. So bond is polar and because molecule is V-shaped, Oxygen has permanent
Negative partial charge. Also molecule is polar and makes Hydrogen bonds with other water molecules.
A Praying Mantis was covered with water. Within a couple of hours, the liquid water changed into water vapor. Is this a physical or chemical change? Explain your reasoning.
Answer: Chemical change
Explanation:
Because the body of the Praying Mantis is hotter than the water so it makes it "melt" into water vapor that will soon evaporate.
Inside
Outside
0
10
20.30
50
60
30
80
90 100
Time
(minūtes)
Change in
mass 19
6
0
3
2
9
33:
39
N
1.5.1
(10)
Plot a line graph of these results.
List TW nyimnmental factors that sould have caused the greater change
12
Answer:
The North produced 17 times more cotton and woolen textiles than the South, 30 times more leather goods, 20 times more pig iron, and 32 times more firearms. The North produced 3,200 firearms to every 100 produced in the south
The North produced 17 times more cotton and woolen textiles than the South, 30 times more leather goods, 20 times more pig iron, and 32 times more firearms. The North produced 3,200 firearms to every 100 produced in the south
What is the relationship between DNA mutations and the disorders? Disorders:Hemophila,Beta thalassemia, and Sickle Cell Disease
Answer:
disorders are caused by mutations of these genes
Explanation:
Can anyone tell me how old this bird is. We found it outside.
Which position would the Sun need to be in to make the shadow of the box look the way it does in the picture?
A
B
C
D
Answer is B
Answer:
Explanation: Não sei
Rachel Carson wrote in Silent Spring, "The chemical war is never won, and all life is caught in the crossfire." Respond
Answer:
Yes.
Explanation:
Yes, the statement is right because in chemical war, great damage occurs to all living organisms that has a bad effect on our environment. These chemicals are very dangerous so its usage in the war has long term effects on the environment and the organisms that live in it. Both the opponents receive great damage from this chemical war and the destruction of the natural beauty of the place vanished where this war occurs so this vanished of beauty and organisms is the defeat of both the opponents that fought this war.
Answer: What is the main idea of the excerpt?
The writer is concerned about the impact of chemicals on humans and animals.
Explanation: The new chemicals come from our laboratories in an endless stream; almost five hundred annually find their way into actual use in the United States alone. . . . Five hundred new chemicals to which the bodies of men and animals are required somehow to adapt each year, chemicals totally outside the limits of biologic experience.
–Silent Spring, Rachel Carlson, 1962
What is the main idea of the excerpt?
-The writer is concerned about the impact of chemicals on humans and animals.
-The writer is concerned about the future of America’s water quality.
-The writer is concerned about the future of America’s air quality.
-The writer is concerned about the impact of litter on the waterways.
Which would be true of sexual reproduction?
a
increases survival rate
b
involves one parent
c
increases genetic diversity
d
produces identical offspring
Answer:
c increases genetic diversity
Explanation:
Answer:
C. increases genetic diversity
Explanation:
First, by process of elimination: sexual production doesn't necessarily increase survival rate, it can, but not always. Sexual reproduction involves two parents, so b is wrong. And sexual reproduction doesn't produce identical offspring, because it's mixing the genes from both parents, do d is wrong. That only leaves c, with two parents, the gene pool is always expanding, and with less chance of mutation
hope this helps:)
Please only respond if you know the answer and links will be reported
Krebs Cycle only i have to keep going
Answer:
Its D
Explanation:
Please help me if you know the answer please
Someone help me please thank you lol!
Hurricanes and severe storms can lead to flooding. Homes are damaged from rising water. The water can enter the home through broken doors, windows, and roofs. Homeowners need to quickly remove the standing water. Which answer is least related to a homeowner quickly working to achcieve a healthy home?
A. Limiting human and pet parasites
B. Removing mosquito and insect larvae
C. Preventing the growth of mold and mildew
D. Settling home and medical insurance claims
Answer:
I would say that the answer is A :)
Explanation:
2 points
4. What conclusion can be drawn regarding a community in which many
species are involved in a food web?
It is more fragile since organisms have more than a single food source
It is more fragile since organisms have only a single food source
It is more stable since organisms have more than a single food source
It is more stable since organisms have only a single food source
It is very prone to damage from human interference
What type of muscle tissue is attached to bone?
Smooth
Cardiac
Striated
Both a & b
Answer:
striated
Explanation:
skeletal muscle: The voluntary muscle of vertebrates, which is striated and anchored by tendons to bone, is used to effect skeletal movement such as locomotion.
What are the risks of using genetically engineered products in the food supply? Check all that apply. cancer risks unknown consequences possible antibiotic resistance
Answer:
Toxicity. Genetically engineered foods are inherently unstable. ...
Allergic Reactions. ...
Antibiotic Resistance. ...
Immuno-suppression. ...
Cancer. ...
Loss of Nutrition.
Explanation:
Answer:
The answer is all 3 choices
cancer risks
unknown consequences
possible antibiotic resistance
Explanation:
how you know that horses are related to other animals?
Answer:
their bone structure
Explanation:
Horses belong to a group of mammals with an odd number of toes. That rules out mammals with two toes, or "cloven hooves," like goats, pigs, cows, deer, and camels. So who are the other odd-toed, plant-eating animals? Most members of this group, known as perissodactyls, are extinct.
Help me plz)))
What type of organ has lost its original function through the process of evolution?
A)analogous structures
B)vestigial structures
C)embryologic structures
D)homologous structures
Answer:
B
Explanation:
vestigial structures like appendix,external part of ear,etc have lost their original function through the process of evolution.
Answer:
B
Explanation:
thks for my opinion I need help kasi sa math eh
The hypothesis would not have been supported
by the data if...
A. traits independently assorted in
approximately a 9:3:3:1 ratio.
B. the traits for white fur and red eyes were
always inherited together.
C. all the F1 offspring had the same phenotype.
Answer: B
the traits for white fur and red eyes were always inherited together.
Explanation:
The hypothesis would not have been supported by the data if the traits for white fur and red eyes were always inherited together by the law of independent Assortment.
What is law of independent Assortment?The law of independent assortment selects alleles of two extra genes into gametes independently of each other.The allele acquired for one gene is unrelated to the allele obtained for another.Mendel's experiment constantly shown that the progeny's distinctive combinations are always unique from their parents'.He formulated the Law of Independent Assortment on this premise.So we can conclude that as the qualities for white fur and red eyes are not usually inherited together, we may deduce that the two features are regulated by distinct genes and are independently shown in the person, as stated by the law of independent Assortment.
Learn more about law of independent Assortment here:
https://brainly.com/question/14894287
#SPJ2
a.) Give one example of how animals respond to their environment
b.) Give one example of how plants respond to their environment
Answer:
1. Animals may to environmental stimuli through behaviors that include hibernation, migration, defense, and courtship. As a result of cold, winter weather some animals will hibernate. Examples of hibernating animals maybe ants, snakes, black bears, beavers, and ground squirrels.
2. Plants grow towards the light. Plant leaves bud and seeds germinate when the temperature is right. Their roots and stems grow in certain directions in response to the pull of gravity.
Explanation:
Answer:
a) For example, a cat may see a saucer of milk. Information from
the cat’s eyes travels along nerve cells to the brain, where the brain
processes the information. If the brain decides it wants the milk,
the brain sends a signal to the muscles in the cat’s limbs, and the cat
moves to the saucer of milk and drinks it
Explanation:
b) For example,
specialized cells in the leaves of trees detect the decrease in sunlight
as winter approaches. Chloroplasts then reduce production of green
chlorophyll. As existing chlorophyll is broken down, other coloured
particles are revealed, creating the beautiful red- and orange-coloured
leaves we see during autumn. Th e leaves eventually die and fall off . In
the spring, increased sunlight and warmer temperatures promote the
production of new leaves containing large amounts of chlorophyll, and
the green colour returns to the leaves.
Which of the following is most likely to happen if data from a scientific
experiment are collected improperly?
O A. The hypothesis will be disproved.
B. The scientist will be discredited.
C. New discoveries will be made.
D. The conclusions will be inaccurate.
Explain why your model improves upon the student’s original model. How would your model help someone who was learning about photosynthesis for the first time?
Answer:
Determine how many groups you will have.
Prepare ping-pong balls.
Collect egg cartons.
Prepare the egg cartons.
Prepare “energy tokens.”
Post signs in the classroom.
Prepare filled H20 and C02 “molecules.”
Explanation:
Photosynthesis occurs in two stages. In the first stage, light-dependent reactions or light reactions capture the energy of light and use it to make the energy-storage molecules ATP and NADPH. During the second stage, the light-independent reactions use these products to capture and reduce carbon dioxide.
Answer:
This new model may better explain the elements required for photosynthesis to occur. Sunlight, water, and carbon dioxide are required for the plant to produce its own food. Someone who is unfamiliar with the process of photosynthesis must begin with the basics and then build on this knowledge.
why doesn't ice evaporate?
Answer:
Ice doesnt evaporate because it melts.
Explanation:
What describes the goal of genetically engineering crops?
Answer:
Genetically modified crops (GM crops) are those engineered to introduce a new trait into the species. Purposes of GM crops generally include resistance to certain pests, diseases, or environmental conditions, or resistance to chemical treatments (e.g. resistance to a herbicide).
Which scientist created the most modern classification hierarchy that we use today? Aristotle Linnaeus Woese Whittaker
HELP ME PLEASEEEE
Answer:
Linnaeus
Explanation:
Answer:
Linneaus
Explanation:
Linnaeus is responsible for taxonomy, the most modern classification of heirarchy we use today.
State the difference between poultry and poultry keeping
Answer:
I don't know what Poultry keeping is but Poultry is the group name for all domesticated birds used for meat, eggs, or feathers. Poulry are also referred to as birds and fowl. These birds have wings, backbones, and feathers; some can even swim.
Explanation:
- Eijiro <3
What two diseases have been studied together that provide evidence of evolution in
humans?
A)malaria and ebola
B)sickle cell anemia and malaria
C)cytochrome c disease and plasmodium fever
D)iron-deficient anemia and yellow fever
Answer:
sickle cell anemia and malaria
Explanation:
Scientists believe the sickle cell gene appeared and disappeared in the population several times, but became permanently established after a particularly vicious form of malaria jumped from animals to humans in Asia, the Middle East, and Africa.
The two diseases have been studied together that provide evidence of evolution in humans is sickle cell anemia and malaria.
What is sickle cell mutation?
The sickle cell mutation is relevant to malaria because infection of a red blood cell with the malaria parasite leads to hypoxia. In individuals of the AS genotype such blood cells sickle and are then eliminated by macrophage cells of the body’s immune system, lessening the burden of infection (Luzzatto, 2012). Carriers of the sickle cell trait are particularly resistant to severe malarial episodes; they are less resistant to mild cases. The mechanism by which carriers are protected from malaria is different than the acquired immunity that both AA and AS individuals achieve following repeated exposure to the disease.
The benefit that possessing a single copy of the sickle cell gene conveys counterbalances the biological cost incurred when homozygous SS children are stricken with sickle cell disease. An individual of the AS genotype is more likely to reach adulthood than is an individual of the AA genotype, but the former is also more likely to see his/her child die of sickle cell disease. This is known as a heterozygote advantage or balanced polymorphism. As shown more formally below, the stronger is the pressure of malaria on survival, the more advantaged are individuals who carry the S gene, and in equilibrium, the higher the percentage of the population who will be carriers. Indeed, it was the correlation of high prevalence of the sickle cell gene and the presence of malaria that first led scientists to understand the protective role of the sickle cell mutation (Kwaitkowski, 2005). As will be seen in the next section, the underlying genetic mechanism by which the sickle cell trait is transmitted provides a means of mapping sickle cell prevalence into an estimate of the mortality burden of malaria.
Learn more about cell mutation
https://brainly.com/question/17031191
#SPJ2
Which of these statements explains why the plants in Groups E and F died? The high sugar content caused too much water to move into the root cells. The high sugar content caused too much water to move into the root cells. The high sugar content clogged the pores in the cell membranes. The high sugar content clogged the pores in the cell membranes. The high sugar content prevented the plant from capturing energy. The high sugar content prevented the plant from capturing energy. The high sugar content caused too much water to move out of the root cells.
Answer:
The high sugar content caused too much water to move out of the root cells.
Explanation:
Too much causes transpiration to occur, in this case too much water killed the plant.
The statement which explains why the plant in Group E and F died is that the high sugar content caused too much water to move out of the root cells.
What do you mean by High sugar content?
High sugar content in plants may be defined as the amount of carbohydrates (glucose) and their components get accumulated in the different parts of the plants in a high ratio. It also affects the rate of photosynthesis.
High sugar content leads to the loss of water (transpiration) in plants. In this condition, water loss is maximum which results in the scarcity of water in the root cells. And hence the plant died.
Therefore, the statement which explains why the plant in Group E and F died is that the high sugar content caused too much water to move out of the root cells.
To learn more about Transpiration, refer to the link:
https://brainly.com/question/6899
Which are characteristics of all bacteria? Check all that apply. NO LINKS
1. They lack a nucleus.
2. They have a nucleus.
3. They eat other organisms.
4. They make their own food.
5. They are eukaryotes.
6. They are prokaryotes.
Answer:
1. They lack a nucleus
4. They make their own food
6. They are prokaryotes
Explanation:
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
Why do surface currents move in circular patterns?
Answer:
Ocean water moves in predictable ways along the ocean surface. Surface currents can flow for thousands of kilometers and can reach depths of hundreds of meters. These surface currents do not depend on weather; they remain unchanged even in large storms because they depend on factors that do not change.
Surface currents are created by three things:
global wind patterns
the rotation of the Earth
the shape of the ocean basins
Surface currents are extremely important because they distribute heat around the planet and are a major factor influencing climate around the globe.
Answer:
The Coriolis effect causes winds and currents to form circular patterns.
plz mark me as brainliest.
Which would a chemoautotroph use to produce energy?
Yuki has a bowl of ice. She places the ice in a warm room and watches as it melts into liquid water. Yuki then places the liquid water over a Bunsen burner and heats it until it vaporizes. Explain what happens to the water molecules in Yuki's experiment; from the beginning to the end of the experiment.
Answer:
ice is a solid.When heat is added it turns into a liquid,its a reversible change.As regarding to the water moleculesWhen water is heated, it expands, or increases in volume. When water increases in volume, it becomes less dense. As water cools, it contracts and decreases in volume. When water decreases in volume, it becomes more dense. For samples of water that have the same mass, warmer water is less dense and colder water is more dense.Im not sure if this helps but try it out :)