Solid
Right now, you are probably sitting on a chair, using a mouse or a keyboard that is resting on a desk – all these things are solids. Something is usually described as a solid if it can hold its own shape and is hard to compress (squash). The particles in most solids are closely packed together. Even though the particles are locked into place and cannot move or slide past each other, they still vibrate a tiny bit.
Ice is water in its solid form or state. Ice keeps its shape when frozen, even if it is removed from its container. However, ice is different from most solids: its molecules are less densely packed than in liquid water. This is why ice floats.
Liquid
The simplest way to determine if something is a liquid is to ask this question: If I try and move it from one container to another (i.e. by pouring), will it conform to (take on the shape of) the new container?
Water is a liquid
We can pour liquid water from one container into another. Liquid water takes on the shape of its container.
If you have a glass of water and pour it into another glass, it clearly conforms – it takes on the shape of the glass. If you spill the water, it will go everywhere. Because it isn’t in a container, it conforms to the shape of the floor, making a big puddle!
In most liquids, the particles are less densely packed, giving them the ability to move around and slide past each other. While a liquid is easier to compress than a solid, it is still quite difficult – imagine trying to compress water in a confined container!
Water is an example of a liquid, and so are milk, juice and lemonade.
Water is everywhere
Water is all around us. Water can be a liquid – like rain or in rivers, lakes and oceans. Snow and ice are solid water. Water can even be a gas. Most things on Earth need water to live.
Find out more about water by looking at our wide range of resources under the water topic.
Gas
The atoms and molecules in gases are much more spread out than in solids or liquids. They vibrate and move freely at high speeds. A gas will fill any container, but if the container is not sealed, the gas will escape. Gas can be compressed much more easily than a liquid or solid. (Think about a diving tank – 600 L of gas is compressed into a 3 L cylinder.) Right now, you are breathing in air – a mixture of gases containing many elements such as oxygen and nitrogen.
Water vapour is the gaseous form or state of water. Unlike ice or water, water vapour is invisible. We exhale water vapour whenever we breathe out. We cannot see the water vapour as we exhale, but if we hold our eyeglasses or smartphone to our mouths, we can see the water vapour condensing (becoming liquid) on these objects.
Other states of matter
We’ve known about solids, liquids and gases for hundreds of years, but scientists have discovered other states. One state is plasma, which naturally occurs in lightning, and we create it in fluorescent light bulbs and plasma TVs. Another state of matter is Bose-Einstein condensate, but this state only occurs with super-low temperatures.
The solid substance takes up less space than the same substance in the gaseous form because the molecules are closer together.
Physical state
The physical state of a substance depends on the organization of its molecules.
If they are closer together, we have the solid state, if they are a little apart, you have the liquid state, and if they are further apart, we have the gaseous state.
So, as in the solid state the molecules are closer together, they will take up less space than if they were in the gaseous state.
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Biomagnification: Hidden Dangers in Food
Webs
Answer:
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Explanation:
Biomagnification is the process by which toxins and pollutants become increasingly concentrated in the bodies of animals as they move up the food chain. This means that organisms at the top of the food chain, such as humans, can end up with dangerously high levels of these pollutants in their bodies if they consume contaminated prey.
When does this phenomenon is concerning ?This phenomenon is particularly concerning when it comes to certain toxins, such as mercury and persistent organic pollutants (POPs) like PCBs and DDT. These toxins can have serious health consequences, including neurological damage, developmental delays, and cancer.
One example of biomagnification in action is with mercury contamination in fish. Mercury is released into the environment through various human activities, including burning coal and waste incineration. When this mercury enters waterways, it can be transformed into methylmercury, a highly toxic form that accumulates in the tissues of fish and other aquatic organisms.
As larger fish consume smaller fish, the concentration of methylmercury in their bodies increases, leading to dangerously high levels in the bodies of top predators like sharks and swordfish. When humans consume these contaminated fish, they can also accumulate dangerous levels of methylmercury in their bodies.
Similarly, POPs like PCBs and DDT can enter the food chain through contaminated soil and water. As these toxins move up the food chain, they become increasingly concentrated in the bodies of top predators like birds of prey and mammals like seals and polar bears.
These toxins can have serious health consequences for these animals, including reproductive problems and weakened immune systems. When humans consume these contaminated animals, they can also accumulate dangerous levels of these toxins in their bodies.
Biomagnification is a serious issue that highlights the importance of careful monitoring of environmental pollutants and the need for sustainable practices to prevent contamination in the first place.
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__________ is the sum of all the chemical reactions in a cell.
Select one:
a. Reproduction
b. Metabolism
c. Homeostasis
d. Responding to stimuli
Answer:
Metabolism
Metabolism, the sum of the chemical reactions that take place within each cell of a living organism and that provide energy for vital processes and for synthesizing new organic material.
Explanation:
Hope it helps :)
Answer:
metabolism
option B is correct answer of this question
hope it helps
have a nice day
The different finches found in the Galapagos Islands developed very different beaks, depending on the type of food avail of seeds. Other finches have developed beaks for drilling holes in wood, eating cactus, or even drinking the blood of the If a storm hits and causes the death of nearly all of the cacti on the islands, which of the following will be the most likely outcome for the cactus ground finch?
A. They will be unable to eat and will die out
B. They will evolve into different species of finch
C. They will adapt to eating a different source of food
D. They will form social groups with other finches to collect food
what would happen if a sex cell could not complete DNA replication?
Because meiosis creates cells that are destined to become gametes (or reproductive cells), this reduction in chromosome number is critical — without it, the union of two gametes during fertilization would result in offspring with twice the normal number of chromosomes!
Which of the following describes the structure of an amino acid
Help please Confusing
What does a river do to the land it flows through?
A stopped car begins moving and reaches a speed of
25m/s in 5 seconds. What is its acceleration?
+25m/s2
+5m/s2
-Om/s²
5m/s
Answer:
B) 5m/s^2
Explanation:
The formula for acceleration is [tex]\frac{vf-vi}{t}[/tex]
vf is the final velocity which in this question is 25m/s
vi is the initial velocity which in this question in 0m/s because it says "A stopped car"
t is the time which is 5 seconds
When you put these numbers into the formula you get 5m/s^2
State TWO characteristics that the respiratory surface used for gaseous exchange in human beings has in common with the respiratory surface used in flowering plants . Explain how EACH characteristic makes the respiratory surface suitable for gaseous exchange .
Answer:
Those gases can only cross cell membranes when they are dissolved in water or an aqueous solution, thus respiratory surfaces must be moist.
Respiratory surfaces in both human beings and plants have several characteristics that are peculiar and similar to each other. There are some requirements to be met for gaseous exchange to occur.
Two characteristics that the respiratory surface used for gaseous exchange in human beings has in common with the respiratory surface used in flowering plants include ---
1. Respiratory surface must be thin and allow for rapid diffusion.
2. These surfaces must be in contact with air or fluid.
Respiratory surfaces in plant living cells in the stem are organized in thin layers close to the surface.Their loose packing ensures air spaces where they are in close contact with the airflow either in or out. In humans, the respiratory surface is thin allowing for rapid diffusion of oxygen in and CO₂ out. They are also always in contact with the bloodLearn more: https://brainly.com/question/9128660
How would you use the water cycle in your rainforest biome?
Answer:
The role of rainforests in the water cycle is to add water to the atmosphere through the process of transpiration (in which plants release water from their leaves during photosynthesis). This moisture contributes to the formation of rain clouds, which release the water back onto the rainforest.
Explanation:
Hope it helps
How long did insects fly before birds?
Earth’s mantle plays an important role in plate tectonics. Why is the mantle so important to this process?
Answer:
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Make your own definition of "life"
Lemon juice, snake venom and cyanide have similar characteristic
Answer:
what is the question?
Explanation:
i) How can you increase the magnetic strength of a solenoid? (2 points)
ii) Give any two uses of electromagnets.
PLEASE ANSWER THIS IS URGENT!!
What is the most specific level of taxonomy?
A. Phylum
B. Class
C. Kingdom
D. Species
Answer:
D. Species
Explanation:
Species is the most specific major taxonomic rank; species are sometimes divided into subspecies, but not all species have multiple forms that are different enough to be called subspecies.
Answer:
D. Species
Explanation:
A Siamese cat has genes that affect it’s fur color. it’s fur color is also affected by temperature which of the following claims is true
Answer:
A Siamese cat has genes that affect it’s fur color.
Explanation:
What transport method do you think the Golgi apparatus uses to ship packages of proteins out of the cell?
What is the approximate distance from the surface to the center of Earth?
A. 1,000 miles (1,600km)
B.4,000 miles (6,400km)
C. 10,000 miles (16,000km)
D. 40,000 miles (64,000km)
Answer: B Around 4,000 miles.
3
population(s) can have the same
species name?
01
02
05
O 10
Answer:
Please write the correct Question
Answer:
1
Explanation:
Which is a tertiary consumer in this food web?
Answer:
Look below.
Explanation:
A tertiary consumer is an animal that eat primary consumers and secondary consumers. From this knowledge we can conclude that the tertiary consumer is the mountain lion since nothing consumes the animal and it is on the top of the food web for consuming the most energy.
Answer:
The Mountain Lion
Explanation:
In a food web the arrows indicate energy being transferred to the animal it's pointing to from the animal it's pointing away from. In other words the arrow points at the animal that ate the one it is pointing away from. Since the Mountain Lion has the most arrows pointing to it, it's the highest predator in this food web. Since it is at the top it is a tertiary consumer.
Do living things go through mitosis? Justify your answer
Answer:
Yes
Explanation:
mitosis is how more cells are created that are genetically identical to the parent cell. it's essential to growth and repair
All living organisms are able to reproduce and produce offspring, where as eukaryotic organisms that includes aquatic plants and algae, which proliferate through the process of mitosis. Mitosis is the process in which a cell divides into two cells.
What is Mitosis?Mitosis is defined as the process of cell division in which chromosomes are duplicated and equally distributed into two daughter cells where each daughter cell has the same number of chromosomes as the parent cell, i.e. diploid. Hence, mitosis is known as equivalent division.
The mitosis process, which produces two identical nuclei/daughter cells, has four phases: prophase, metaphase, anaphase, telephase. Mitosis in the cell cycle is preceded by the G2 phase where metabolic changes assemble the cytoplasmic materials needed for mitosis and cytokinesis and the metabolic changes that occur after the G1 phase prepare the cell for division.
Thus, all living organisms are able to reproduce and produce offspring, where as eukaryotic organisms that includes aquatic plants and algae
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Which of the following is NOT evidence for evolution?
A. the fossil record
B. homologous and vestigial structures
C. animals competing with each other
D. animals moving from sea to land
Answer:
C - Animals competing with each other
Explanation:
C is the only one that doesn’t give evidence of evolution
A shows the similarities between the skeletons in different animals. This can help scientists see what organisms have similar structures and what animals they could have evolved from
B shows what organisms could share a common ancestor. Homologous means that the organisms have the same structure in some part of them. Vestigal means the organism has a part to it’s body that is useless. This easily shows what organisms could have a common ancestor
D shows how animals could have evolved from living in the water to being able to survive on land. Pretty self-explanatory
Animals have always competed with each other, so that doesn’t give any evidence of evolution
rocks are made of one or more ____________.
Question 3 options:
Organic organisms
Minerals
Rocks
Types of Granite
Which answer choice best explains why tractor trailers take more time to speed up and slow down than regular cars?
Answer:
sorry but i need the points
Explanation:
cuantos electrones se necesitan para formar una carga de-38 uC sabiendo que la carga de un solo electrón es -1.6x10-19 C
Me ayudan xfavor
Answer:
24 * 10 ^ 13 electrones
Explanation:
Tenemos la siguiente información;
Carga en un solo electrón = -1.6x10-19 C
Carga en el electrón en consideración = -38 uC o -38 * 10 ^ -6 C
Ahora,
si la carga en 1electron es -1.6x10-19 C
x electrones tienen una carga de -38 * 10 ^ -6 C
X = -38 * 10 ^ -6 C / -1.6x10-19 C
24 * 10 ^ 13 electrones
Practice Time:
1. A car traveling 35 km/hr accelerates to a speed of 45 km/hr in 0.25 hr. What is its acceleration?
Answer:
1km/hr every 1.5 minutes
Explanation:
The acceleration is 40 km/hr²
The initial velocity of the car is= 35km/hr
The Final velocity of the car is = 45km/hr
The Time taken by the car is = 0.25
Acceleration= velocity/time
= 45-35/0.25
= 10/0.25
= 40
Acceleration is 40 km/hr²
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Why is sweating an effective way to cool the body
Answer:
As the sweat evaporates off your skin, you cool down. Sweat is a great cooling system.
Explanation:
Answer: When the sweat hits the air, the air makes it evaporate (this means it turns from a liquid to a vapor). As the sweat evaporates off your skin, you cool down. Sweat is a great cooling system, but if you're sweating a lot on a hot day or after playing hard you could be losing too much water through your skin.
Explanation: Have a great day!!!
What is the relationship between a mutation and a gene?
A mutation changes the sequence of DNA bases of a gene.
A gene causes a mutation when it manufactures the wrong protein.
A mutation creates new genes from the same DNA segment.
A gene results in a mutation when it produces a change in the type of mRNA.
Aggy is a very long day and I don't have to go back and forth to the store to pick up a little bit and I have been there for me to do it again and .
Answer: I am answering this question 2 years later to tell you its A change in the sequence of DNA is known as a mutation.
Explanation:
Which organic molecule can be broken down into glucose, during digestion?
O Lipids
Proteins
Nucleic acids
O
Carbohydrates
Answer:
carbohydrates
Explanation:
I'm not rlly sure but I think its carbohydrates