I NEED HELP W/ THESE QUESTIONS!!!

Answer:

D. Oxygen is a pure substance and rocks are mixtures

Explanation:

I took the exam and got this right

Answer:

Option (D)

Explanation:

Taconite is a silica-rich and low-grade ore of iron. This iron ore was initially considered to be a waste rock due to the abundance of higher-grade natural iron ore. But now, with the decreasing amount of natural iron ore, the use of taconite is increasing. They are extremely hard rock and the iron ore present in this rock is extracted by the use of magnetism. Due to the heavier weight, these rocks are needed to be transported from one place to another using very heavy vehicles.

These rocks are obtained by the smelting process in which carbon is used to heat the iron ore. This emission of carbon into the atmosphere can contribute to pollution.  

These rocks are usually found in the streams and wetland areas. They are abundantly present on earth and not a non-renewable resource.

Hence, the most appropriate answer is option (D).

Gneiss can be identified by its foliated texture with alternating bands of light and dark minerals, and sometimes eye-shaped quartz masses known as augen; it is a high-grade metamorphic rock formed from schists or granites.

The observable characteristic that could be used to identify a rock sample as gneiss is its distinct foliated texture. Gneiss is a high-grade metamorphic rock characterized by alternating bands of light and dark-colored minerals, typically quartz and biotite mica. The surface of gneiss may also feature augen, which are eye-shaped masses of quartz that give rise to the term augen gneiss. This rock typically forms from the metamorphism of schists or granites and is a product of high-grade metamorphism, where minerals have segregated into distinct layers due to intense heat and pressure.

Final answer:

The observable characteristic that can be used to identify the rock sample as gneiss is the presence of alternating bands of light- and dark-colored minerals.

Explanation:

The observable characteristic that can be used to identify the rock sample as gneiss is the presence of alternating bands of light- and dark-colored minerals. Gneiss is a high-grade, foliated metamorphic rock, and these alternating bands are a result of the intense metamorphism that has caused minerals to self-segregate into discrete zones. In the case of gneiss, the bands are often composed of minerals such as quartz and biotite mica.

If the cat is removed the population of birds will escalate and exceed the population of the snails that sustain them.

The food chain is a depiction of the feeding relationship that exists in an ecosystem. An ecosystem is a self-supporting unit in which materials and energy are exchanged.

The food chain is as follows;

garden plants --> snails ---> birds --->household cat. We can see that removal of the cat means that the population of birds will escalate beyond the available population of snails. This will lead to competition for food among the birds within the ecosystem. The population of snails will suddenly decrease due to increase in the number of their predators. The number of garden plants will also increase due to the decrease in snail population.

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Plate tectonics is the study of movement of the Earth's plates, called tectonic plates. A tectonic plate is a huge, irregularly shaped slab of solid rock. They are commonly composed of continental and oceanic lithosphere. Weather, as well as others, cause tectonic plates to slide, this causes a slight shake, volcanoes or earthquakes.

The soccer players are most likely huddling around each other for the ball. Water is in State A and air is in State B. In a chemical change, a completely new substance is formed. The tadpole changes its shape and form as it becomes a frog. Molding a wire of gold is an example of recombination of atoms to form newer molecules. A chemical change changes substances into new substances with new properties. The mass of the frozen juice formed is most likely 250 g. The mass of Substance D is 6 g, which is 10 g less than the mass of Substance A.

The soccer players are most likely huddling around each other for the ball, which is similar to how atoms in the liquid state move and interact with each other. In the liquid state, the atoms are free to move around and can cluster together in groups.

The correct combination of states and substances is State A = water and State B = air. Water cannot be compressed and retains its shape, while air is highly compressible.

When a chemical change takes place, a completely new substance is formed. Option C is most likely true. In a chemical change, the composition of the substance changes, resulting in the formation of new substances with different properties.

The physical change that takes place in a growing frog is that the tadpole changes its shape and form. Option B is correct. The physical change involves the development and transformation of the tadpole's body into that of a frog.

An example of recombination of atoms to form newer molecules is molding a wire of gold. The gold atoms are rearranged to form a new shape or structure. Option A is the correct answer.

The process that changes substances into new substances with new properties is a chemical change. Option A is the correct choice.

In this case, the mass of the frozen juice formed is most likely 250 g, as mass remains the same during the physical change of freezing. Option A is the correct answer.

In this scenario, the mass of Substance D is 6 g, which is 10 g less than the mass of Substance A. Option A is the correct statement.

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The assertion that DNA is not found in the nucleus of all eukaryotic cells is incorrect. In fact, the nucleus of eukaryotic cells does contain DNA, which is essential for the cell's functioning and reproduction.

The statement 'DNA is not found in the nucleus of all eukaryotic cells' is false. DNA, which stands for deoxyribonucleic acid, is indeed found in the nucleus of all eukaryotic cells. Eukaryotic cells, as opposed to prokaryotic cells, have a nucleus that contains their DNA. This DNA is responsible for the cell's genetic information and instructions for cell functioning and reproduction. This is a basic and universal characteristic of eukaryotic cells.

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H2O is acquired by osmosis in the plants cells, and or through the stomata. CO2 is obtained in the way of the stomata.

In biology, osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell's partially permeable membrane.

Moreover, the spontaneous passage or diffusion of water or other solvents through a semipermeable membrane (one that blocks the passage of dissolved substances—i.e., solutes).

Hence, osmosis is the transport of a solvent through a semipermeable membrane that separates two solutions of differing solute concentration. During osmosis, the solvent moves from the solution that is lower in solute concentration to the solution that is higher in solute concentration.

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amino acid       is the answer

The answer is color because it leaves a red trail

ATP and NADPH transfer chemical energy to 3-PGA.

Glyceraldehyde 3-phosphate (G3P) is created.

G3P is used to make sugar.

The reduction stage is the second stage of the Calvin cycle in which the molecules of 3-phosphoglyceraldehyde are produced through the process of carbon fixation. These molecules are then converted into the simple sugar molecules known as glucose.

The Calvin cycle may be defined as a type of dark reaction of photosynthesis that is light-independent. It occurs in the chloroplast of the plant and converts carbon dioxide into glucose.

The reduction stage of the Calvin cycle initiates with the transfer of chemical energy from the ATP and NADPH to 3-phosphoglyceraldehyde.

Therefore, it is well described above.

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It's called a Cirque, or Corrie

Hope that's right and helps

Answer: Cirque

Explanation: Cirques are bowl shaped, circular depression that are formed at the top region of the mountains, due to the melting and erosion of glaciers. It is an erosional feature.

Cirques are separated from one another by aretes, that are steep narrow long ridges found at the top part of the mountain. The walls of this cirques are very steep and their diameter ranges upto a size of 1 kilometer.

Answer: Its DNA.

Explanation:

The genetic material of which all living beings are created recieves the name of DNA (deoxyribonucleic acid). It is present in living organism cells and it is the one that provides the instructions of what to do to the cell, it gives orders as of when a  cell needs to grow, to do an specific function and how that cell would respond to its environment.