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4 years ago

A pure substance has a/an _______ composition.

Biology

2 answers:

horrorfan [7]4 years ago

6 0

Answer:

1. A pure substance has a definite constant composition.

2. A compound is composed of two or more types of matter that can be present in varying amounts.

3. A solution is a homogeneous mixture.

4. A mixture that is not uniform throughout is a Heterogeneous mixture

5. A pure substance that cannot be broken down chemically is a element.

6. A characteristic of matter that’s not associated with a change in its chemical composition is known as a physical property.

7. Wax melting is an example of a physical change in the state of matter.

8. A banana peel turning brown is an example of a chemical change in the state of matter.

Degger [83]4 years ago

3 0

Answer:

constant

mixture

homogeneous

heterogeneous

element

physical

chemical

Explanation:

A good answer should contain the following:

got this from penn foster

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There are several different kinds of aquatic ecosystems. Bogs get their water from precipitation, so they don't have many Fill i

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Bogs get their water from precipitation, so they don't have many nutrients.
Marsh plants are adapted to waterlogged soil
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Estuaries are wetland regions where freshwater rivers mix with ocean water.

Explanation:

A wetland is a biome which has both water and land that are intermixed in various ways. According to the type of the wetland, the ecosystem differs.

Bogs: Wetland with water from precipitation and no inflow or outflow of surface or ground water.

Soil: Acidic, infertile with less nutrient content

Vegetation: Acid-loving plants

Swamps: Forest wetlands near rivers and lakes.

Soil: well draining, mineral soil

Vegetation: Trees and bushes. Swamps are classified according to the vegetation, like coniferous swamp, hardwood swamp, shrub swamp etc

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Soil: Organic and mineral soil

Vegetation: Hydrophytic plants adapted to waterlogged soil

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Soil: Saline alkaline soil

Vegetation: Mangrove trees

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Rivers are flowing water bodies which flows through water current and picks up sediments as it flows.

Lakes are stationary water bodies that are enclosed by land mass on all its sides.

The wetlands act as a natural filter and receive all the sediments, pollutants etc which are dissolved in water and carried by the rivers and other water sources.

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