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
pochemuha
3 years ago
10

Today, we have seven major continents. However, most geologists don't think it was like this 200 million years ago. They think t

here was just _____.
one supercontinent
two supercontinents
three separate continents
four separate continents
Chemistry
2 answers:
Oksanka [162]3 years ago
5 0
Yeah this is option A one supercontinent
basically a long time ago we would have lived on pangea

Eventually this would split into two and we would get Gondwana and also Laurasia, so thechnically option two would be a possible choice but option A is the most possible choice.
Alborosie3 years ago
4 0

Answer:

The correct answer is one supercontinent.

Explanation:

Geologists believe that more than 200 million years ago there was one supercontinent, which is a collection of all the different existing continents. Based on gelogical evidence and software technology the borders of the existing continent were given more accurate fits in the reconstruction of one large supercontinent.

You might be interested in
Sedimentary rocks form
grin007 [14]
Hello there!

Sedimentary rocks are formed due to layers so the answer is A.

Best wishes
-HuronGirl
5 0
3 years ago
How many grams of magnesium metal will react completely with 5.2 liters of 4.0 M HCl?
neonofarm [45]
1) Find the number of mols of HCl in 5.2 liters of 4.0M solution:

n = M*V(L) = 4.0 mol/L * 5.2 L = 20.8 mol

2) Find the number of mols of Mg that will react with 20.8 mol of HCl, using the coefficients of the balanced equation

[1mol Mg / 2 mol HCl] * 20.8 mol HCl = 10.4 mol Mg

3) Transform mol to mass using the atomic mass:

10.4 mol Mg * 24.3 g/mol = 252.7 g of Mg.

4 0
3 years ago
Which of the following foods is likely lowest in nutritional value and highest in fat?
bogdanovich [222]
Tomato Suop Creamchsee almonds and pears
6 0
3 years ago
Read 2 more answers
Why is the piece of coal layered?
marysya [2.9K]

Answer:

Coal is layered because it is a type of sedimentary rock

Explanation:

3 0
3 years ago
Review the PCR (Calvin-Benson-Basham) cycle and the photochemical (light) reactions. If photosynthesizing green algae are provid
stepladder [879]

Answer:

Explanation:

THE PHOTOCHEMICAL(LIGHT) REACTIONS :This is a phase of photosynthesis where sunlight is used as a source of energy to manufacture two chemical compounds which are "Reduced nicotinamide adenine dinucleotide phosphate"-NADPH and "Adenosine triphosphate"-ATP.This phase of photosynthesis involves 4 steps or reactions which are :

STEP 1 : Activation or Energization of chlorophyll - In this reaction,chlorophyll molecules in green algae or plants absorb sunlight and become activated,that is the electrons of the chlorophyll molecule acquire solar energy and become excited.

STEP 2 : PHOTOLYSIS OF WATER - Here the energy absorbed by the chlorophyll molecules are used to split water molecules into H+ ions and OH-- ions.

STEP 3:Formation of NADPH -The hydrogen ions (H+) produced reacts with an NADP ( an electron carrier in the chlorophyll) to form NADPH.

STEP 4: FORMATION OF ATP - The high energy generated from the electron transfer process or chain is used to add a phosphate group to ADP (Adenosine dphosphate) to form ATP.

DARK PHASE :In this phase of photosynthesis,the NADPH generated in the light phase is used as a reducing equivalent to reduce CO2 to form Glucose (food) using the ATP generated as a source of energy.

7 0
3 years ago
Other questions:
  • Write the concentration equilibrium constant expression for this reaction. 2cui (s) + i2 (aq) → 2cu+2 (aq) + 4i− (aq)
    14·2 answers
  • What is a,well designed experiment called?
    15·1 answer
  • In the diagram attached inside, if electrons flow from the right half-cell to the left one through the wire, which of the follow
    8·2 answers
  • 1. A bacterium that can use NO3 - as a terminal electron acceptor is found to contain sulfur granules. This cell . . . A. reduce
    14·1 answer
  • Calculate the amount of energy released in the formation of one mole of BaSe bonds (not lattice energy). The radius of the bariu
    13·1 answer
  • blants, water moves in a continuous column in direction. Both One direction, down only One direction, up only Any way it wants t
    7·1 answer
  • 9. The prefix oct- means
    9·1 answer
  • Oi oi oi oi ewin <br> .................
    10·1 answer
  • Explain why the fingertip and not the palm of the hand is used to detect braille symbols​
    6·1 answer
  • What is the molarity of a solution prepared by dissolving 8 grams of BaCl2 in enough
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!