Dissolving salt is a physical change because only the matter of the mixture changes. With physical changes, the change is able to be reversed. Once reversed, the solute and solvent will return back to its normal state. When it comes to a salt mixture, once settled, the solution can be taking through an evaporation process.
This process is exposing the mixture to a high temperature. ...
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The correct answer to this question is 10. To answer this question, we will need to analyze the world problem and do the math. First, we need to do subtraction, which would be 203 - 150. This will give us 53. From there, we will do division. That will be 53 / 5. Doing this, we will get 10.6. However, 10.6 is not the answer because .6 of a unit is not able to be administered. This makes the ...
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The correct answer to this question is frequency of a sound. Many people know about pitch in reference to music. In music, it is important to perform and sing the right pitch so that the sound will be right. Outside of music, a pitch can be low, such as when you hear a truck rumble.
It can also be high, such as with a whistle. There are also some pitches that we are not able to hear. ...
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The correct answer to this question is A shiny mirror. We know this because the purpose of looking into a mirror is to see your own reflection. Reflection and Refraction are two concepts of physics. Reflection is when light travels through a material and then is bounced off a different material. The light that is reflected will travel in a straight line and it will only travel in one ...
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The correct answer to this question is LIF. This compound stands for Lithium fluoride. To answer this question, we should first look at halogens electronegativity. It goes as follows: F > Cl > Br > I. Then, we should look at the alkali metals. The electropositive !Character of these metals goes up as follows: Li < Na < K < Rb < ds Using these two bits of information, we will find that LiF ...
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The correct answer to this question is Oxidation. This is a chemical reaction, and it happens when electrons move. To break it down further, it is when a substance gives electrons away, which makes it oxidized. An everyday example of when we see oxidization is when iron rusts.
This rusting occurs because the oxygen reacts with the iron, and it causes it to lose some of its electrons. ...
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The correct answer to this question is earthquake. These can also be known as temblors and quakes. A person will feel this when the Earth is shaking. This is caused by the energy being released in the lithosphere of the Earth. From there, it creates waves that are seismic.
These earthquakes can cause much damage to a physical location, such as homes and businesses. Earthquakes can ...
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C is the correct answer to this question. The moon that is known as the new moon is the first in the lunar phase. The lunar phase happens when the Moon and the Sun have the same ecliptic longitude. When looking at block C, you will see that the new moon is a crescent shape and it is think.
During the lunar phase, the disk is unable to be seen with the natural eye. To be able to see ...
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A scientific formula is a way to show information about atoms' chemical properties. It is hard to say what is the most used scientific formula because these formulas are not just used in science, but they can also be used in math. To be, the most popular scientific formula would be H20. This scientific formula is for water.
The H stands for hydrogen, and the O stands for oxygen. The ...
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The correct answer to this question is Almonds. These nuts originated in parts of China and Asian. It is also believe that they were cultivated there. Although there is no exact timeline, it is believed that the almonds have been around since the fourth millennium B.C. or even earlier.
Since the time they have been around, almonds require very cold weather in the winter to grow, as ...
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