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kipiarov [429]
3 years ago
7

You are comparing a reaction that produces a chemical change and one that produces a physical change. What evidence could you us

e to dertimine which type of change is
occurring?
Biology
1 answer:
Zina [86]3 years ago
8 0

Answer:

To understand the physical change and chemical change, one needs to know what is physical properties and what is the chemical properties of a substance.

Physical property is characteristic or trait of a substance that can be observed without converting the substance to a new substance. If there is any type of change in these physical properties like changing the appearance or form of matter and does not make a new substance, takes place it is called physical change.

A chemical change is a change in the matter of a substance that creates one or more new substances. This type of change includes the formation, color, of a precipitate, change in texture, and many other changes.

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Please needed as soon as Possible thank you!
kramer

Answer:

The answer is B. Stratum Basale

5 0
2 years ago
Select the star life cycle that is most accurate
Komok [63]

The correct answer is A. Nebula, star of seven stellar masses, a red supergiant, supernova, black hole.

Explanation

Stars have a life cycle that begins with the gravitational collapse of a gaseous nebula. Subsequently, thermonuclear fusion occurs that allows the conversion of hydrogen into helium, this causes the released energy to pass through the star and radiate in a phase called the star of seven stellar masses. After several billion years, the star passes to the "red giant" stage. Here the star contracts and raises its temperature. After this, the stars (which have masses greater than the sun) detach from their layers forming supernovae, and later, these give rise to "black holes". According to the above, the correct answer is A. Nebula, star of seven stellar masses, a red supergiant, supernova, black hole.

6 0
2 years ago
Scientists calculated the net primary productivity at two different forest sites. Both forests have the same gross primary produ
Katen [24]

Answer:

The answer is C.

Explanation:

Net Primary Productivity is a term that is used to express the difference between CO2 that is taken in by the plant with photosynthesis minus CO2 that the plant releases.

The two forest sites given in the example may not have the same biodiversity and the same species of plants so we can't be sure of option B.

Again for the same reasons, we can't be sure of option D because we do not know the specific plant species in each forest since they are in different areas.

Option A can be ruled out for the same reasons, the lack of information about the forest sites, since we do not know the death rate of the plants in either of the forests.

Option C can be true because forest A has a higher net primary productivity rate which can be an indication of lower respiratory activity hence lower CO2 production, resulting in the given higher net primary productivity.

I hope this answer helps.

4 0
3 years ago
No one individual will have all the alleles and variations for their entire species.<br> T or F
Snezhnost [94]
It's true because it's just is
7 0
3 years ago
PLZ HURRY
Sunny_sXe [5.5K]

Answer:

2

Explanation:

DNA is tightly packed up to fit in the nucleus of every cell. As shown in the animation, a DNA molecule wraps around histone proteins to form tight loops called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin

3 0
2 years ago
Read 2 more answers
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