What is a chemical change?
What are some examples of chemical changes?
What is the essential difference between a physical change and a chemical change?
Why do physical properties change?

Answer:

no

Explanation:

no your friend is not right, everything is supported by the law of conservation of matter, just because the oxygen atoms are split doesn't mean it isn't supported by this

Answer:Melting.

Freezing.

Evaporation.

Condensation.

Sublimation.

Explanation:

Answer: Examples for the five transformations previously given.

For the first four, we encounter common examples in everyday life, all to do with water:

Freezing - liquid to solid, e.g. water to ice, e.g. making ice cubes.

Melting - solid to liquid, e.g. ice to liquid water, melting ice cubes or snow flakes.

Condensation - gas to liquid, e.g. water vapor (gas) to liquid -  water vapor in air (humidity) condenses to form liquid droplets on the outside of a cold beverage glass on a hot humid day; or cloud formation  in the atmosphere.

Evaporation - liquid to gas, e.g. liquid water on clothes evaporates as clothes dry on clothesline or in dryer

While water can sublime under certain conditions of temperature and pressure, it is less evident in everyday life.  Carbon dioxide however is a more common example.

Sublimation - solid to gas, e.g. "dry ice" disappearing. The visible smoke associated with dry ice is most likely just condensing water vapor in the air as the solid carbon dioxide cools the air.

Explanation:

Answer:DId you even read it you have to that in your lab class and  says you need other information aint no way i can answer that

Explanation:

Answer:

Some small volcanoes only erupt once in their lives,

while other volcanoes erupt multiple times. Kilaeua volcano in Hawaii, which has been erupting continuously since 1983, is the world's most active volcano. While some volcanoes erupt at regular intervals, there are always exceptions to the rule

Answer:

small volcano's only 1 time while big volcano's mutiple times

Explanation:

The statement that best describes which traits are expressed by an organism is A.

An organism expresses all the traits for which it carries genes. This is because an organism's traits are determined by the combination of genes it carries, which includes both dominant and recessive genes. Even if a trait is not expressed in an organism, it can still be carried in its genes and passed on to its offspring. Therefore, all the traits for which an organism carries genes have the potential to be expressed in either the organism or its offspring.

B-An organism expresses only the traits whose genes are inherited from a parent.

Let us go option by option :

1) Genes are located in chromosomes. TRUE

Chromosomes are in cell nucleus. A chromosome contains hundreds and thousands of genes. A normal have 23 pairs of chromosomes, and a total of 46.

2) Chromosomes are the in nucleus.

TRUE

Chromosome is structure found in nucleus of the cell. It is made up of protein and DNA.

3) A single Chromosome can contain hundreds of genes.

TRUE

single Chromosome can contain hundreds of tgenes.

4) All of the above

TRUE

As all the statements above are true. The correct option is 4.

Answer:

all of them are true

Explanation:

this is because chromosomes contain genetic materials and it is present in the nucleus.
Therefore, the correct option is 4) all of these are true

no problem

Answer:

Explanation:546

Answer:

A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.

Explanation:

Answer:

A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity.

physical changes are boiling, melting, freezing, and shredding.

Explanation:

Answer:

A. Subsoil

Explanation:

i hope this helps i remember learning it faintly

Answer: the answer is b or c

Explanation:

I took it

Answer:

Option (D) A Generator

Explanation:

A generator is an equipment that has to do with the production of electricity by the use of electromagnetic induction. The generator has split rings that make contact with the exterior.

Learn what is a Generators here

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Stairs, wall, door, window, picture, floor, desk, backpack, paper, bed all of these produce different sound.

Sound is defined as an acoustic wave is a vibration that travels through a gas, liquid, or solid transmission medium. In terms of human physiology and psychology, sound is the brain's receipt of these waves and perception of them. A mechanical disturbance that causes an equilibrium condition to be disturbed and propagates through an elastic material medium.

The vibration of items creates sound, which travels from one place to another through a medium. Vibration is the phrase used to describe an object's to-and-fro or back-and-forth motion. Vibrations are generated by objects in motion.

Thus, stairs, wall, door, window, picture, floor, desk, backpack, paper, bed all of these produce different sound.

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Answer:

Solid and gas

Explanation:

Answer:

coal

plastic bags

carbon dioxide

1

4

coal

Answer: C) Does the temperature affect how much crickets chirp

Explanation:

Answer:

mechanical waves and electromagnetic waves

Fire stick Managing the environment through farming Aboriginal people  routinely burned grass to minimise fuel and promote new growth in order to attract grazing animals for hunting.

Among the various ways that agriculture has an impact on society are the provision of food, habitat, and employment opportunities; the provision of raw materials for food and other goods; and the development of robust economies through commerce.

A large number of species use pasture and crops as both a habitat and a source of food, making up around 50% of the planet's livable land. Sustainable management of agricultural operations has the potential to safeguard watersheds, restore significant habitats, and improve the quality of the soil and water supply.

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In chemistry, a mixture is a material made up of two or more different Chemical substance/substances which are not chemically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.

Answer:

I believe it is D/ Scientific theories cannot be proven but they can be disproven

Explanation:

I choose it on a test I'm waiting for my result

Answer:

There could be several possible reasons for a small gap between rails on a railway track, such as:

1. Expansion joints: Railways are designed to allow the tracks to expand and contract with changes in temperature. To accommodate this expansion, small gaps are left between the rail ends and filled with expansion joints or plates.

2. Wear and tear: Over time, the rails may experience wear and tear due to heavy loads, weather conditions, and other factors. As a result, small gaps can appear between the rails.

3. Maintenance: During maintenance activities, rail tracks may be adjusted or replaced, which could lead to small gaps between the rails.

4. Environmental factors: Environmental factors such as soil shifts, earthquakes or other natural disasters can also affect the alignment of the rails, leading to small gaps.

These are some of the possible reasons for a small gap between the rails on a railway track.

Answer:

The small gap left between the rails in a railway track is intentional and serves a specific purpose. This gap is known as the rail joint, and it allows for the expansion and contraction of the rails due to changes in temperature. When the temperature changes, the metal rails will expand or contract, and if they were joined together tightly, they could buckle or become deformed, which could be dangerous for trains passing over them. The rail joint allows the rails to move slightly and prevent damage to the track.

Additionally, the rail joint also allows for maintenance and repairs of the track. If there were no gap between the rails, it would be challenging to replace a damaged rail or perform routine maintenance, such as tightening bolts or lubricating joints. With the rail joint, maintenance personnel can easily access and work on the track.

Overall, the small gap left between the rails in a railway track is intentional and serves a crucial function in ensuring the safety and reliability of the track.

Answer:

1. Reuse things like cups, towels, cloths, etc.

2. Plant a tree. (Trees and other organic energy sources are traditional sources of renewable energy.)

3. When using natural resources, only use the necessary amount so you're not wasting any.

Hope this helps!!

To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.

Answer: c

Explanation: longer faults make bigger earthquakes.

Answer:

The sun rays reaching the earth heat up its surface .

The heat absorbed by the earth is released in the night therefore the cloudy nights are hot.

Explanation:

Answer:

Our Sun's rays heat up Earth's surface.

Answer:

potassium, sodium, lithium, magnesium, copper, silver, gold

Explanation:

thanks me later ')

Answer:Trade winds blowing in a curved manner

Explanation:Because i like the answer

Answer:

H20 is a compound and ozone is a compound to because the got more then u elements in it

Explanation:

Answer:

Water is a compound because it is composed from two hydrogen atom and one oxygen atom. Water is considered a compound because it is made up of more than one element. By definition, a compound is composed of multiple atoms from different elements. Water has 2 hydrogens and 1 oxygen.

A compound is a combination of more than one element.

A molecule is the smallest particle of an element or a compound.

Oxygen(O) is an element.

O2 - is a molecule which is formed by making a double bond with another Oxygen.

O3 - is a molecule as well, which comprises of three oxygens with two single bonds and one double bond. The resonance structure has a partial positive charge on the central Oxygen and partial negative charges on the end oxygens.

Explanation:

"In summary, the modern definition of a compound is a type of molecule consisting of at least two different types of atoms. By this definition, water is both a molecule and a compound. Oxygen gas (O2) and ozone (O3), for example, are substances that are molecules but not compounds."

Answer:

The answer is option D.

A weakly basic solution

Hope this helps.

Answer:

Explanation: Apex a weakly acidic solution