_____ helps to destroy animals and plants when they die, preventing them from fossilizing.

Answer:Nuclear energy is the stored potential energy in the nucleus of an atom. ... Compared to this, light energy is a form of electromagnetic radiation such that it is composed of photons, which are small packets of light energy. Each photon has a characteristic wavelength, frequency.

Explanation:

The acceleration of a 100 kg canoe with a force of 1000 N applied to it is 10 m/s²,

calculated using the formula a = F / m.

The acceleration of a 100 kg canoe that feels a force of 1000 N can be calculated using Newton's second law of motion, which states that acceleration is equal to the net force divided by the mass of the object. Hence, the acceleration a is given by the formula:

a = F / m

Where F is the force exerted on the canoe and m is the mass of the canoe. Substituting the given values:

a = 1000 N / 100 kg = 10 m/s²

Therefore, the acceleration of the canoe is 10 meters per second squared (m/s²).

It is sulfur, selenium, oxygen

Sulfur, selenium, oxygen

B. Metamorphic rock

:)

Answer:

It lowers the freezing point by 30 °C

Explanation:

In the picture attached, the curve freezing point vs de-icing fluid concentration is shown. We can see that a 45% solution of de-icing fluid makes the freezing point of water -30 °C, that is, 30 °C below the pure water freezing point.

Answer is Carbon-14

Radioactive isotopes have half lives. Half life is the time taken by the radioactive isotope to reduce its initial amount by half.

Oxygen-16 and Carbon-12 are stable isotopes of elements O and C respectively. Hence, they do not have half-lives. But Carbon-14 and Uranium-238 are radioactive isotopes. Among them Carbon-14 has relatively short half-life as about 5730 years while Uranium-238 has a long half-life as about 4.5 billion years.

Convection currents are driven by temperature differences, gravity, and the density changes that heat induces in fluids, causing a cycle of rising warm fluid and sinking cool fluid.

The three factors that set convection currents in motion are temperature differences, gravity, and the density variations that occur as a result of heating and cooling within a fluid (which can be either a liquid or a gas). In natural convection, warmer parts of a fluid, which are less dense, rise due to buoyant forces, whereas cooler, denser parts sink. This movement can result in the transfer of heat. An example of this is seen in the circulation of air in Earth's atmosphere, where warm air from the equator rises and moves toward the poles while cooler air sinks and moves toward the equator. This entire process is driven by the temperature differences between different parts of the fluid and the action of gravity which acts on the differences in density that temperature changes create.

Answer: The correct answer is Graph B.

Explanation:

Inertia is the property of a matter due to its mass. Due to inertia, a body resits any change in its state of rest or motion. Newton's first law is based on inertia and is also known as Law of inertia.

This law states that any body will remain at rest or in motion until and unless an external force is applied on it.

Inertia is directly related to the mass of a substance. As, the mass is more, its inertia will be more and vice-versa.

The graph will represents the direct relation is Graph B. As, the mass is increasing, the inertia is also increasing

Hence, the correct answer is Graph B.

Answer:

C. developed the theories of erosion and deposition

Explanation:

Hutton was a scottish geologist who believed that the origin of the earth was linked to molten magma and igneous rocks. His theory included the processes of erosion and deposition.

Therefore, the correct answer is C. developed the theories of erosion and deposition.

The name of an element changes when its atomic number changes. This can occur naturally through radioactive decay or artificially through a process known as transmutation, where changes are made in the number of protons in an atom's nucleus.

The name of an element changes when its atomic number changes. This happens either through natural radioactive decay processes or through artificial transmutation involving changes in the number of protons in an atom's nucleus. For example, Uranium-238, over time, naturally decays to Lead-206, signifying a change in the atomic number, hence a change in element name.

Similarly, in Accelerators or nuclear reactors, high-energy particles can be used to convert some elements into others. For instance, the bombardment of nitrogen atoms by alpha particles in a nuclear reaction can transform it into Carbon.

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Nitrogen, oxygen, carbon, and hydrogen are nonmetals essential for life on Earth. Nitrogen is necessary for protein synthesis, while oxygen is used in respiration and is part of essential molecules like water. Photosynthesis has played a key role in shaping Earth's atmosphere, which is unique in its balance of oxygen and carbon dioxide.

The nonmetals in the atmosphere essential for life on Earth include nitrogen, oxygen, carbon, and hydrogen. These elements are found in various combinations that are vital for different processes. Nitrogen makes up 78% of the Earth's atmosphere and is crucial for the formation of proteins in living organisms, though it's not directly usable in its gaseous form N₂. Nitrogen is a component of the Earth's atmosphere and contributes to diluting oxygen, which prevents rapid combustion. The atmosphere contains oxygen, used by all living things for aerobic respiration and essential in energy production within cells.

Oxygen is also essential for processes like combustion and is involved in the creation of molecules necessary for life, such as water (H₂O) and carbon dioxide (CO₂). Carbon and hydrogen, although less abundant in the atmosphere compared to nitrogen and oxygen, are part of vital organic molecules like glucose (C₆H₁₂O₆), which is crucial for energy production in life forms. These elements are tied to life-sustaining processes, such as photosynthesis, which maintains the balance of oxygen and carbon dioxide in the atmosphere.

Life on Earth has notably altered the composition of the atmosphere compared to other planets like Venus and Mars, which have atmospheres with very high concentrations of CO₂ due to the absence of water and mechanisms like photosynthesis that recycle carbon dioxide into oxygen. Earth's unique atmosphere, rich in oxygen and with moderate levels of carbon dioxide, is the result of these life processes.

Answer:

1. Answer: A, a good sentence

2. Answer: D, fragment

3. Answer: D, fragment

Explanation:

the first sentence is a complete thought, it has a subject and a verb. Both 2 and 3 are fragments, or the beginnings of sentences.

In the given examples, 'The cats ran.' is a good sentence, 'The giant turtle named Bob.' is a fragment because it lacks a verb, and 'Rolling around in the dirt.' is a fragment as it does not have a clear subject or verb. Option A, D, D is correct.

Let's practice identifying sentence faults and correct the given examples:

the answer is D temperature, pressure,and the original type of rock

The presence or absence of mineral crystals determines whether a metamorphic rock is foliated or non-foliated.

A mineral is an inorganic solid that forms in nature and has an organised atomic structure and a known chemical composition.

Even while it may seem like a mouthful, if you break it down, it becomes clearer. Minerals are created naturally.

Foliated metamorphic rocks have layers or stripes that result from the alignment and lengthening of the rock's minerals during metamorphism.

Non foliated metamorphic rocks, on the other hand, don't have the minerals that align during metamorphism and don't have layers.

Thus, The presence or absence of mineral crystals determines whether a metamorphic rock is foliated or non-foliated.

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A broad, flat area of land on both sides of a river, where sediments are deposited when it overflow its banks is called a floodplain.

A river can be defined as a large natural body of fresh water that flows continuously into an ocean, lake, sea or another river. Some examples of a river include the following:

A floodplain simply means a broad, flat area of land on both sides of a river, where sediments are deposited when it overflow its banks. Thus, a floodplain is an area of broad, flat land near a river that is usually flooded when the river overflow its banks or becomes too full.

In conclusion, old rivers are typically characterized by floodplains.

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An unbalanced force has acted on the vehicle.

The answer is synthesis reaction

The explanation:

when synthesis reaction or direct combination reaction is a type of chemical reaction in which two or more simple substances combine to form a more complex product. The reactants may be elements or compounds. The product is always a compound

and we here

Fe2O3 + 2SiO2 → Fe2Si2O7

Fe2O3 is combined with SiO2 and form a more complex product Fe2Si2O7

so this is a synthesis reaction.

This chemical equation represents a synthesis reaction. This identification is based on the fact that the reactant chemical compounds combine to form a single chemical substance that is different from the initial chemical substance.

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The answer to your question would be:: the wind because it carries the sand until it runs into an obstacle

Sand dunes: These are small hills made up of lose sand.

During formation of dunes ( in deserts or sea shores) there is creeping of sand particles along one side and there is sliding of sand on other side resulting in formation of a dune.

Thus the agent causes sand dunes to form is the wind carries the sand until it runs into an obstacle

Answer:

igneous rock

When gas molecules escape from the surface of an open container of liquid, the process is called evaporation. This involves molecules gaining enough energy to leave the liquid phase and enter the gas phase.

This occurs because some molecules in the liquid acquire enough energy to overcome the attractive forces holding them in the liquid phase. These energetic molecules then move into the gas phase, where they disperse and fill the available space in the container.

If the container were sealed, a dynamic equilibrium between evaporation and condensation would be established. During this equilibrium, the rate of molecules escaping (evaporating) would equal the rate of molecules returning to the liquid phase (condensing).

Steps involved in evaporation:

This constant movement between phases ensures that at equilibrium, the number of gas-phase molecules remains constant if temperature remains unchanged.

Answer: (A) They are igneous.

Explanation:

The answer is B

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