pH is an indicator of how acidic or basic a substance is. The pH scale ranges from 0 - 14, with 7 representing neutral. Acids have a pH below 7; bases, a pH greater than 7. Scientists determine the pH of a substance by using an indicator; indicators change color depending on the pH of a substance. Different indicators work at different pH ranges, as seen in the table above. The transition range of an indicator is the range of pH when the indicator changes from its low-pH color to its high-pH color. If the indicator shows a color between the two, then the pH lies somewhere in that transition range. You have been given a liquid that turns pink in phenolphthalein and blue in thymolphthalein. Tests with methyl violet and bromophenol blue resulted in a violet color. Based on your test results, determine which statements regarding the liquid are accurate. Choose ALL that apply.

A. The liquid is a base.
B. The liquid is an acid.
C. The liquid has a pH > than 7.
D. The liquid is an H⁺ donor.
E. The liquid mostly likely contains OH⁻.

Answer:

sending heat toward the polar regions

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Sound travels more quickly through solids than through liquids and gases because the molecules of a solid are closer together and, therefore, can transmit the vibrations (energy) faster. Sound travels most slowly through gases because the molecules of a gas are farthest apart.

hope this helps.

Answer:

Atom

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The smallest unit which maintains an element's properties is an atom.

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Explanation:

any type of spreading disease that kills

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The cell membrane's main trait is its selective permeability, which means that it allows some substances to cross it easily, but not others. Small molecules that are nonpolar (have no charge) can cross the membrane easily through diffusion, but ions (charged molecules) and larger molecules typically cannot.

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The water may not fall for a while because the water that dosen't go down the stream won't be able to evaporate. So rain clouds won't form in that area.

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I hope I helped.

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Demographic and genetic phenomenon

destruction of habitat

introduction of invasive species

climate change

hunting and illegal trafficking

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cell membrane disease

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Answer:

NaNO3

Explanation:

Sorry If its incorrect

The addition of a solution of sodium iodide and potassium nitrate has been the displacement reaction.

The reaction has resulted in the formation of the precipitate of Potassium iodide and Sodium nitrate.

The chemical equation for the reaction can be:

[tex]\rm NaI\;+\;KNO_3\;\rightarrow\;NaNO_3\;+\;KI[/tex]

The reaction has been an exothermic reaction with the formation of the pale yellow precipitate of the potassium iodide.

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Other Causes of Extinction

In addition to habitat destruction, other human-caused problems are also threatening many species. These include issues associated with climate change, pollution, and over-population.

Habitat Destruction

Your habitat can be altered, and you can easily adapt. Most people live in a few different places and go to a number of different schools throughout their life. But a plant or animal may not be able to adapt to a changed habitat.

Humans often destroy the habitats of other organisms. Habitat destruction can cause the extinction of species.

Extinction is the complete disappearance of a species. Once a species is extinct, it can never recover.

Invasive Species

As we have learned earlier in the unit, invasive or non-native species can also change an ecosystem.

When invasive species enter an ecosystem they change that ecosystem's dynamic and cause a disruption to the flow.

Climax Community

A climax community is the end result of ecological succession. The climax community is a stable balance of all organisms in an ecosystem, and will remain stable unless a disaster strikes.

Human Activity

It's important to note that human activity has the greatest impact on the amount and quality of wildlife habitat in many areas of the world. Wildlife habitat can be destroyed or its quality diminished as a result of urban growth, agricultural practices, pollution, or habitat destruction.

People can also have a positive impact on wildlife populations through improvement and protection of habitat or ecosystems. Planting trees and shrubs and providing sources of food and water in individual yards is one way people can help wildlife.

Answer:

Genotypes: Hh, Hh, hh, and hh

Phenotypes: Short Hair, Short Hair, Long Hair, Long Hair

Have a nice day! ^-^

Explanation:

Hh, Hh, hh and hh

Hh = Hh = May be long hair or short hair

hh = hh = Short hair

So,

Mainly phenotypes are Long hair, long hair, short hair and short hair.

Answer:Light bounces off of the mirror and then appears to come from behind the mirror.

Explanation:Plane mirrors form images that are virtual, upright and the same size and shape as the object it is reflecting.

When rays of light from the object hits a plane mirror they bounces off the mirror,that is they undergo reflection, and appear to originate from behind the mirror, resulting to the formation of a virtual image.

The image formed appears to be behind the plane in which the mirror lies. A virtual image is an image that is formed at a location from which the rays of light appear to come from. The image can not be formed on a screen..

It is B nevermind I thought it was c but it wasn't.

Answer:

So hey Which one was it ?

Explanation:

The component of Alfred Wegener's theory that is known to be false is as follows:

Thus, the correct option for this question is D.

Continental drift may be defined as the process of the gradual movement of continents as the result of the motion of tectonic plates. It is a type of hypothesis that illustrates that the Earth's continents have migrated over geologic time with respect to each other.

This theory by Alfred Wegener demonstrates that similar kinds of plants and animals live on continents separated by oceans. According to him, all existing continents were once joined into a supercontinent known as Pangea. The boundaries of many neighboring continents fit together due to the gradual splitting of Pangea.

Therefore, the Moon’s gravity and Earth’s spin can move the continents is the component of Alfred Wegener's theory that is known to be false. Thus, the correct option for this question is D.

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#SPJ2

Answer:

The number of waves that pass a fixed point in a given amount of time

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umm sorry but some times do it your self

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its too much and the people that say download here and put bit . ly blah blah are fake.

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Answer:    The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

Answer:

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants. this is what I think I hope I didn't get the same answer as anyone else.

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Answer:

The difference between weather and climate is a measure of time. Weather is what conditions of the atmosphere are over a short period of time, and climate is how the atmosphere "behaves" over relatively long periods of time.

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Answer:

Weather and climate are not the same things, yet we might get confused between the two.

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sorry if this does not answer your question

Answer:

Option 4 is the right of ur question

4.Elements in family 7 have similar properties.

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I think it is C since the trees hold the habitats of the animals and provide cover so with less animals there is less diversity.

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Biodiversity boosts ecosystem productivity where each species, no matter how small, all have an important role to play. For example, A larger number of plant species means a greater variety of crops. Greater species diversity ensures natural sustainability for all life forms.

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Answer:

CLIMATE CHANGE AND ECO SYSTEM

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Answer:

a

Explanation: