Answer:
Explanation:
This is an example of a mixture which can be separated with simple separation techniques based on the physical properties of the mixtures.Magnetism, and filtration and evaporation
Iron is a magnetic material,but salt and sand are not,Therefore,the iron can be separated from the mixture with the use of magnet.
Salt and sand are mixable.But salt is soluble in water,but sand is not.Therefore by adding the sand and salt to water,the salt will dissolve,in the water(solvent) to form a salt solution. But the sand can be separated out of the solution by filtration with the filter paper inserted into a funnel which allows the salt solution to pass through,while restricting the sand.
The sand would be removed by the filter paper,while solution passes through.
The salt solution and some sand residues is placed in evaporating dish and heated at low temperature. The water from the solution evaporates,leaving the salt behind.
A combination of two are more substances that is not chemically combined is called a mixture.
In order to separate a mixture of iron, salt and sand, we need a magnet, water, a filter and a hot plate. The magnet is brought close to the mixture and all the iron is removed.
Next, water is added. The water will dissolve the salt while the sand will settle beneath the vessel. The solution can now be filtered and the sand is removed. To recover the salt, the solution is heated using the hot plate until all the water is evaporated and the dry salt is recovered from solution.
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What information cannot be studied effectively using human torso models? I. the approximate sizes of organs II. the textures of organs III. the interrelationships of organ functions IV. the positions of organs within the body
Answer:
II. the textures of organs
Explanation:
A human torso model is designed to be as accurate as possible so that students/researchers can understand the inner workings of the body. Therefore, the organs have been designed to be the same size of an actual human being of that stature, while also being in the correct position within the body to better understand the interrelationships between the organs. The only thing that is not accurate in these models is the texture of the organs as most are smooth plastic unlike the actual organs.
Answer: ll and lll only
Explanation:
True a False/ a theory is a scientific idea that has been proven to be true.
Answer:
No,it has to be proven true its not already true
Explanation:
It has to be proven true,it can't be true becuase someone said it was without any proof.
what was the independent variable in this experiment
Explanation: the actual thing that you are testing and changing in your experament can also be called the manipulated variable hope this helps
The hindbrain is mainly responsible for:
A. communication between all parts of the brain.
B. logical thought and language.
C. processing sensory input.
D. basic life functions and muscular coordination.
Answer:
basic life functions and muscular coordination.
Explanation:
The night sky is filled with images of wild animals. Which animal is the circled constellation named after?
scorpion
serpent
snake
salamander
Answer:
Scorpion
Explanation:
Answer:
A
Explanation:
A student tossed a coin five times and observed results of four tails and one head. He concluded that when a coin is tossed, there is an 80% chance of getting a tail and a 20% chance of getting a head. The conclusion would be more valid if? A only two tosses of the coin had been used B the weight of the coin had been used C a greater number of tosses had been used D the surface the coin had landed on had been taken into consideration
Answer:
B
Explanation:
An easy way to think of independent and dependent variables is, when you're conducting an experiment, the independent variable is what you change, and the dependent variable is what changes because of that. You can also think of the independent variable as the cause and the dependent variable as the effect. True True False
Answer:
True, True, True
Explanation:
Not exactly sure what you are asking, but I'm guessing you want confirmation.
What is the meaning in life it seems so pointless??
Answer:
To be happy
Explanation:
Honestly If you are happy then life is good, what do you crave in life... go after it
THIS IS A PSYCHOLOGY QUESTION.
Describe the major theories for the purpose of sleep. Why do we sleep?
Based on your understanding of how producers make food, make a prediction about the relationship between sunlight and carbon dioxide uptake by a plant.
Answer:
photosynthesis
Explanation:
the carbon used in photosynthesis comes primarily from the air or surrounding aquatic environment
a. true
b. false
Answer: true
Explanation:
Basalt is dark in colour. Give reason.
Answer:Basalt is usually dark grey to black in colour, due to a high content of augite or other pyroxene minerals, but can exhibit a wide range of shading.
Explanation:
Some basalts are quite light-coloured due to a high content of plagioclase, and these are sometimes described as leucobasalts.
What are some possible future career fields in environmental science?
Answer:
Environmental science is a branch of science that deals with biological and chemical issues in the environment and establish initiatives for a healthy environment.
Environmental science is a vast subject and comes with many future career fields, some of them are as follows:
Environmental Scientist: The responsibility of environmental scientists is to analyze samples of air, soil, water, food and other materials and informing about health risks and environmental hazards.Environmental Lawyer: Environmental Lawyer deals with the technical understanding of environmental issues and argues for the benefit of environment.Environmental Engineer: Environmental Engineer design projects on the basis of environmental protection.Zoologist: Zoologist studies the behaviour of animals and their interaction with the natural environment, human beings and other animals.Hydrologist: Hydrologists analyzes the impact of the environment on the quantity and quality of water and the influence of water on the environment.Thus, there are many career fields in environmental science.
Environmental science is a branch of science which deals with both biological and chemical factors reside in the environment and establish a healthy environmental initiatives.
What is the application of environmental science?Environmental science is a vast subject related to environment and its components, it mainly deals with climates to animal survival, to air quality, and much more
It shows its effect on Public Health, Land Management, Waste Disposal and Pollution, Overpopulation, Water, Deforestation, Ecosystems, Endangered Species, Climate Change
Some carrier option include, you can opt for an Environmental Scientist where the role should be analyze samples of air, soil, water, food and other materials.
You can choose for Environmental Lawyer mainly deals with the understanding of environmental issues and argues for the benefit of environment.
Environmental Engineer is another field where you can design projects for environmental protection, as a Zoologist where you can study behavior of animals and their interaction with the natural environment,
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3 to 4 examples of biological enzymes
Answer:
1.Lipases
2.Amylase
3.Maltase
4.Trypsin
11. In which of the following examples will water move into the cells of the large intestine from the outside environment by the process of osmosis?
Osmosis occurs in the large intestine to transfer water from the feces into the neighboring cells.
What is the process of osmosis?Water is transported across cell membranes through diffusion and osmosis. The body reabsorbs absorbable solutes and electrolytes from meals (namely salt, potassium, and chloride ions).
The total solute concentrations and the permeabilities of the solutes in relation to water define the effective osmolality of a biological fluid, the large intestine to transfer water from the feces into the neighboring cells.
Water molecules move by osmosis across the cell membrane from a lower solute concentration to a higher solute concentration.
Therefore, osmosis, a kind of diffusion, is how water enters and exits the cell's large intestine to transfer water from the feces.
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Are Eukaryotic cells the most sophisticated cell?
Answer:
Eukaryotic cells are more complex than prokaryotes, and the DNA is linear and found within a nucleus. Eukaryotic cells boast their own personal "power plants", called mitochondria.
Explanation:
What type of element is Iron
pls hurry
? 3. Explain why Surtsey provided ideal conditions for studying primary succession:
Answer:
Due to newly formed land.
Explanation:
Surtsey provided ideal conditions for studying primary succession because due to volcanic eruption all the vegetation and living organisms are destroyed from the surface and the land has no vegetation. Primary succession only occurs when the land is colonized for the first time after the formation of land due to natural disaster such as volcanic eruption etc. So we can say that Surtsey provided the conditions for observing primary succession.
Which of the following are health issues related to algal blooms?
i. rashes
ii. allergic reactions
iii. intestinal problems
A. i only
B. ii and iii only
C. i, ii, and iii
D. i and iii only
Answer:
C. i, ii, and iii
Increasing the rate of an impulse is the function of the_________.
A myelin sheath
B. axon terminals
C. cell body
D. axon
Answer:
Myelin sheath
Explanation:
Increasing the rate of an impulse is the function of the myelin sheath. Thus, the correct option is A.
What is Impulse?The Impulse may be characterized as an electrical signal that can be transmitted along a nerve fiber in response to an external or internal stimulus.
The Myelin sheath increases the rate of nerve impulses. This is because it insulates the part of axons and reduces the chances of any disturbance in between due to the assemblage of voltage-gated sodium channels.
Therefore, increasing the rate of an impulse is the function of the myelin sheath. Thus, the correct option is A.
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Which of the following is the best definition of a system?
A. The form and arrangement of an object
B. a group of connected or related things?
C. Something that takes up space and has mass?
D. A collection of organs?
Answer
answer would be d
Explanation:
if correct brainlist?
Answer:
B. a group of connected or related things?
Explanation:
A system must have some form of relationship between the components inside of it. All these components work together to do a certain task or to run efficiently.
For example, let's take the court justice system. Inside the system is broken down into a range that can go from small claims court to the Supreme Court of the United States. This system is to ensure that their is not only a smaller burden on the supreme court to be able to take care more of national & international claims, but also so that if a citizen feel that they have a unfair ruling, they may bring it up to a different court that may not have local preferential to a certain degree.
All parts of a system is connected or related to each other, either as a cause, and effect, or a solution.
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Can someone please help I’ll give brainliest!
The questions are:
1. What are the constants (variables that stay the same- also called controlled variables)?
2. What is the independent variable ?
3. What is the dependent variable?
4. What flaw in the design of the experiment can you find ? Explain .
5. What hypothesis do you think the scientists are trying to test?
Answer:
Explanation:
1) The constants: hours of lgiht per day, their food, wheel for exercise, and cage size
2) Independant variable: temperature
3) Dependant Variable: weight and length
4) Flaw: The mice groups have different amounts of mice. Group 1 has three, group 2 has four and group 3 has two. All groups should have the same number of mice, in this case three mice per group.
5) Does the temperature of a mouse's cage affect their weight and length?
Hope this at least helps!
Which of the following is NOT part of the cell theory? *
All living things are made up of one or more cells.
Cells come from other cells.
The cell is the basic unit of life.
Cells are made of organelles.
Answer:
Cells are made of organelles.
Answer:
cells are made of organelles
Explanation:
because it is why the cells has different kinds
Which of these plant cell structures is also found in a prokaryote?
Answer:
D. Cell wall
Explanation:
Cell wall is also present in prokaryotes it is made of peptidoglycan layer.
what are the two types of eukaryotic cells?
Answer:
animals, plants, protists, and fungi
Which expression best describes the amount of biomass transferred
from the producer level of this pyramid to the tertiary consumer level? (PLEASE ANSWER CORRECTLY AND QUICK)
a > 10% (equal to)
-
b <50% (equal to)
-
c >100%
d <1%
15 points+ brainliest!! please help i need this done asap :(!
What type of weather is Idaho experiencing? (Northwest United States)
A Clear skies and sunny weather due to a low pressure system b Heavy precipitation and clouds due to a low pressure system c Heavy precipitation and clouds due to a high pressure system d Clear skies and sunny weather due to a high pressure system
Answer:
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two.
Explanation:
What is one observation that could be made to support the idea that two rock layers
are the same age?
A.layers with different fossils
B.layers of equal density
C.layers made of the same chemicals
D.layers with similar fossils
When the air near the Earth’s surface warms, an area of ____ pressure is created.
This causes light, warm air to flow ____
Answer:
none
Explanation: i am sorry but i only want points....
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