Answer;
When elements form a compound, the bonds and structure of the elements change.
Explanation;
-Elements are substances (such as oxygen and hydrogen) that can't be split into simpler substances using chemical means. They contain only one kind of an atom. A compound on the other hand is a substance that is formed when two or more elements are chemically joined.
-A compound's properties may differ greatly from those of its component elements. For example; at room temperature both oxygen (O2) and hydrogen (H2) are gases, while water (H2O) is liquid. This means that when elements form a compound, the bonds and structure of the elements change. The atoms in a compound are joined chemically using chemical bonds, such as covalent bonds, ionic bond and hydrogen bonds among others.
The term describing the loss of electrons during metabolism is oxidation. In metabolic processes like cellular respiration, substrates are oxidized to release energy, playing a critical role in sustaining life.
The term that describes the loss of electrons that occurs during metabolism, the process by which your body breaks down and builds up molecules, is known as oxidation. Whenever a substrate is oxidized, it loses electrons. For example, in the process of cellular respiration, glucose is oxidized to carbon dioxide, and oxygen is reduced to water. The transferred electrons are carried by certain molecules to other parts of the cell to release energy used for metabolic functions. Therefore, metabolism and oxidation play crucial roles in our body to sustain life.
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O 30%
O 38%
O 50%
O 63%
A dry soil sample has a volume of 500 mL. After 400 mL of water are added to the soil, the soil becomes saturated with 150 mL of surface water left on top. The porosity of the soil is 50%. Thus, option C is correct.
Forest soil has more moisture than sandy soil therefore the types of plants that are grown in soil of forests are more qualitative and more superior than the sandy plants which are facing certain limitations and facing certain situations.
Forest soil supports plant life, but sandy soil does not support any plants. Forest soil produces more superior life and the plants life are found in the forest area and the sandy plants are lesser found in the sandy areas.
The reason for vegetation in forests is because of the supportive factors that are involved in the good plants life. The soil type that is the richest in organic material would be a dark-colored soil. Decaying matter turns brownish-black which makes this type of soil having a dark color even almost black.
Therefore, A dry soil sample has a volume of 500 mL. After 400 mL of water are added to the soil, the soil becomes saturated with 150 mL of surface water left on top. The porosity of the soil is 50%. Thus, option C is correct.
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Answer:
answer is 50
Explanation:
i gess on quiz and it was correct
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B. penumbral.
C. apogee.
D. eclipse.
2. Which type of electromagnetic radiation cannot be focused?
A. Ultraviolet
B. X-rays
C. Infrared
D. Gamma rays
3. Which of the following statements is true of the corona?
A. It's where sunspots occur.
B. It's the outermost layer of the Sun's atmosphere.
C. It's the visible surface of the sun.
D. It's responsible for the Sun's density.
4. Tides are a result of
A. currents in the ocean.
B. strong winds in the equatorial regions.
C. friction caused by the Earth's rotation.
D. the gravitational attraction of the Sun and Moon.
1.C | 2.D | 3.B | 4.D
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1. The point in the Moon's orbit when it's farthest away from the Earth is called apogee. On the contrary, the perigee is the point in the Moon's orbit when it's the nearest from the Earth. Those points are very important for tides and other natural phenomenon such as eclipse and in general for the observation of the skies.
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2. Gamma rays are a type of electromagnetic radiation cannot be focused. They diffuse from the emission points until there is an object that stops them. This is the reason why when you have to use gamma rays, you are in other rooms, in order to prevent the radiation to go through them.
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3. The corona it's the outermost layer of the Sun's atmosphere. It's also the part where most of the activity of the sun that we can see take places. It's a subject that has fascinating scientists for centuries and only recently we are studying in more details this interesting and weird place, due to the advancement of technology.
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4. Tides are a result of the gravitational attraction of the Sun and Moon. The Earth, the Sun and the Moon have masses and their own gravities. The interactions between these corps causes tides movement on Earth that are fundament to life on the planet, because they are a fundamental part in the cycle of water and air.
Answer:
1.C
2.D
3.B
4.D
Explanation:
1. The orbit on which moon revolve around earth has a perigee point which is the nearest point to earth while apogee is the farthest point to planet earth.
A penumbral is a region in which occluding body obscure a portion of light. It has no relation with the moon's orbit. Also an eclipse is a phase based on position of moon with respect to earth and sun
Hence, option C is correct
2. Gamma rays are extremely powerful and energetic as they are produced as a result of radiation and hence it is very difficult to focus them on normal lenses which are designed to focus only visible light. They interact with the matter of the focusing surface and destroys them selves.
Hence, option D is correct
3. Corona is the outer surface of stars that extends to millions of kilometers into the space. Sun being a star has corona at its outer layer which is visible only during
total solar eclipse. Hence option B is correct
4. When the gravitational force of moon attracts the water on earth, it presume a rising and falling form that is termed as tides.
Hence option D is correct