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2 years ago

Describe the differences between polyp and medusa

1 answer:

5 0

One difference is that some animals are polyp and some are medusa.

The other difference is that some animals have medusa in their life or polp in their life cycle.

Hope these two differences helps :D

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Soil is a renewable resource if properly maintained. Which of the following helps to maintain healthy soil?

brilliants [131]

C. crop rotation

Explanation:

Crop rotation is a farming practice that is commonly used to maintain a healthy soil.

This practices helps to conserve and appropriate a soil for the best use.

During crop rotation, different crop species are planted during a growing season. The patterns are designed to cultivate both crops that replenish and deplete the nutrients in soil.

Through this the fertility of the soil is sustained all year round.

This helps to avoid the use of pesticides on crops.

learn more:

Regions in Mexico for growing crops brainly.com/question/1472033

#learnwithBrainly

8 0

3 years ago

What kind of pattern can you see about elements in the same period with respect to electron

Fantom [35]

Answer: A pattern of same atomic orbitals can be seen about elements in the same period with respect to electron structures.

Explanation:

The horizontal rows in a period table are called periods.

Elements present in the same period will have same atomic orbitals.

For example, electronic distribution of Na is 2, 8, 1 and it is a third period element.

Similarly, electronic distribution of Cl is 2, 8, 7 and it is also a third period element.

Hence, both Na and Cl will have K, L, M shells, that is, they have three atomic orbitals.

Thus, we can conclude that a pattern of same atomic orbitals can be seen about elements in the same period with respect to electron structures.

5 0

3 years ago

If you help me, I will mark you as most Brilliance. I will also give you 5 Stars... !<br> .

pashok25 [27]

Answer:

It is c

Explanation:

This is due, for example, to the fact that when the Earth is closer to the Sun in its elliptical orbit it orbits faster, while when it is further away it orbits slower, averaging to a value equivalent to that of a circular orbit.
Earth has seasons because our planet's axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane – the plane of Earth's orbit around the sun.
While the Earth spins through space it stays almost up right on its axis, although as it spins through space it gives us seasons. One hemisphere, when faced directly to the sun has Summer, meanwhile the other the has Winter. Later on the hemispheres have Autumn and Spring.

6 0

3 years ago

A new penny has a mass of 2.49 g and a volume of 0.349cm3. The density of copper is 8.94 g/mLA)Is the penny made of pure copper?

yawa3891 [41]

Answer:

Zinc metal might be mixed with the copper.

Explanation:

Density is defined as mass of the substance present in the unit volume of the substance.

$Mass=\frac{Mass}{Volume}$

Density of pure copper = d = 8.94 g/mL = $8.94 g/cm^3$

$1 mL = 1 cm^3$

Mass of the copper penny = M = 2.49 g

Volume of the copper penny = V = $0.349 cm^3$

Density of the copper penny = d

$d=\frac{M}{V}=\frac{2.49 g}{0.349 cm^3}=7.135 g/cm^3$

Density of pure copper > Density of zinc > Density of penny

$8.94 g/cm^3>7.14 g/cm^3>7.135 g/cm^3$

The metal mixed with copper is zinc to make a penny . This is so because all the other metal given have higher value of density which will increase the density of the copper penny if they were present.

But here the density of the copper penny is smaller than density of pure copper which means that less denser metal than copper is also added in the penny.

3 0

2 years ago

Mixtures can be separated by chemical/physical change.

schepotkina [342]

They can be separated by both means as they are only mixtures. (Two or more substances mixed together, and can be separated.)

4 0

8 months ago