1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kicyunya [14]
3 years ago
5

7th grade science help me plsssss

Chemistry
1 answer:
Ivanshal [37]3 years ago
6 0

Answer:

They grow slowly over time, they are made up of multiple organisms.

Explanation:

One polyp is one individual. A Coral is made up of several polyps. Each polyp is less than 1 centimeters but a coral is made of many polyp so the coral itself cant be 1 centimeters across.

You might be interested in
What is true of greenhouse gases​
marysya [2.9K]

<h2>Let us explain about green house  gases​</h2>

Explanation:

Green house effect

It can be explained as :

  • The sun emit radiations that consist of infra red rays , ultra violet rays and visible light .
  • The infra red rays (responsible for heating ) when come from sun , it travels through atmosphere and reaches earth surface .
  • On striking the earth surface , it gets reflected and reflected infra red ray has greater wavelength .
  • Then this reflected rays moves back through atmosphere .
  • On doing so , they encounter certain gas molecules like carbon dioxide , methane etc .
  • This gases absorb these rays and do not let them to escape through them .
  • As a result, they get trapped .
  • As we have already mention that they cause heating effect , due to this property they raise the temperature of atmosphere leading global warming .

7 0
3 years ago
Name two elements in which the last electrons to be added are placed into s subshells
LekaFEV [45]
<span>Lithium and Sodium both have their last elections added to s subshells. All alkali and alkali earth metals have their last electrons placed in s subshells.</span>
6 0
3 years ago
Which of the following is NOT a true statement?
Lisa [10]

Answer:

D

Explanation:

objects with larger mass have more gravitational pull

5 0
3 years ago
Read 2 more answers
50 POINTS!!!
lesya692 [45]

The answer is: K is more reactive than Ca because K has to lose only one electron to complete its outermost shell.

Potassium is a chemical element with atomic number 19 (number of electrons is 19).

Electron configuration of potassium is: ₁₉K 1s²2s²2p⁶3s²3p⁶4s¹.

Potassium is the alkali metal and has a single valence electron in the outer electron shell.

Periodic law is the arrangement of the elements in order of increasing atomic number.

For example all alkaline metals (I group of periodic table, Na, K, Cs...) loose one electron in chemical reaction and react vigorously with water.

Reactivity series is an empirical progression of a series of metals, arranged by their reactivity from highest to lowest (alkaline metals have highest reactivity and Noble metals lowest reactivity).

The ionization energy (Ei) is the minimum amount of energy required to remove the valence electron, when element lose electrons, oxidation number of element grows (oxidation process).

Alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons (one electron, earth alkaline metals (right next to alkaline metals) have higher ionization energy than alkaline metals, because they have two valence electrons.


7 0
3 years ago
What term refers to a group of nerve cells that are connected to one another?
vesna_86 [32]
B. Nerve network!

Hope this helps!
7 0
3 years ago
Read 2 more answers
Other questions:
  • Hemoglobin, the oxygen-carrying protein in red blood cells, has four iron atoms per molecules ad contains 0.340 percent iron by
    14·1 answer
  • Balancing Equations: <br> _(NH4)3PO4 + _Pb(NO3)4 = _Pb3(PO4)4 + _NH4NO3<br><br> With work please.
    14·1 answer
  • When the concentration of a system is changed:
    10·1 answer
  • What is true of a sample of gas as temperature is increased?
    15·2 answers
  • What do you call the movement of the earth's surface to the atmosphere?
    6·1 answer
  • What is the job or function of cell walls in plant cellls
    11·2 answers
  • $5,000 multiplyed by $150 multiplyed by $2500 multiplyed by 3%​
    11·2 answers
  • 1.-Una solución de 1600 ml contiene 9,5 gramos de agua oxigenada H2O2 Calcular el porcentaje peso volumen del soluto.
    5·1 answer
  • Is my answer right? i have a feeling its not correct
    11·1 answer
  • What is the volume (in liters) of a 5.52 gram sample of O2 at STP?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!