During the Proterozoic eon was the earth made of land masses all clumped together in one supercontinent called Rodinia. Therefore, option A is correct.
Why is it called the Proterozoic eon?The Archean Eon is followed by the Proterozoic Eon, which spans 2.5 billion years to 541 million years old and is known as the "early life" eon. The majority of the continents' center regions were developed by this time, and the plate tectonic process had begun.
The Proterozoic is currently understood based on geological, geochemical, and fossil evidence. The Cambrian epoch and an explosion of various species at the beginning of the Phanerozoic eon both originated at the conclusion of this eon.
During the Proterozoic Era, Rodinia was a supercontinent that included nearly all of Earth's landmasses for around 450 million years (2.5 billion to 541 million years ago).
Thus, option A is correct.
To learn more about the Proterozoic eon, follow the link:
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takes Mrs. Pare' three hours to drive 175 miles from her house in Pennsylvania to her house in Maryland. What is her average speed?
Answer:58.33mph
Explanation:
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Answer:
H20 Covalent bond
Kl Ionic bond
NaBr ionic bond
Co2 Covalent bond
MgCl2 ionic bond
HCl Covalent bond
Explanation:
Which characteristic describes the traposphere
Answer:
It is the wettest layer of the atmosphere.It extends upto 10km upward from sea level.
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Answer:
A
Explanation:
I believe the Correct answer would be A
Which of the following is the best representation of a heterogeneous mixture ?
A; sand and water
B; perfume
C; Gatorade
D; koolaid and water
Answer:
a)
Explanation:
3. How many moles of KCl is produced according to the chemical reaction?
2KCIO3(s) -------> 2KCI(s) + 302(g) M
Answer:
the answer should be: 12.00 Mol KCIO³ × 3 Mol 0² divided by 2 mol KCIO³ = 18.00 mol 0²
how many grams are in 7.4 moles of HgS?
Answer: 1721.6 grams
Explanation:
What is the phenotype of a plant with the genotype RR?
Red
White
O
Pink
Answer:
This question is incomplete, but it can be answered based on general knowledge of the topic. The answer is RED
Explanation:
This question is describing a gene that codes for color. The allele for red color is R while that of white is r, however, these two alleles exhibit incomplete dominance to form an intermediate phenotype that is PINK (Rr).
Since the heterozygous is pink color, it will take two red alleles to make a plant phenotypically red i.e RR. Note that, genotype "rr" will be white.
List the primary consumers in the food web please help
Answer:
Giraffe, rhinoceros, grasshopper, mouse, and deer
Explanation:
Primary consumers eat producers (plants). Therefore, all the animals that eat the plants are primary consumers.
Answer:
cricket, mouse, snake, bird
Explanation:
Plz help thank you!!!
Answer:
1. Covalent Bond
2. Ionic Bond
Explanation:
Covalent bonds are defined as the bond in which sharing of electrons takes place between atoms. The sharing of electrons is in equal number so that it form a stable balance of attraction and repulsion between atoms. In the given example of CO2 (first image) oxygen is sharing equal number of electrons with carbon to form a stable bond called covalent bond.
Ionic bonds are formed when valence electrons are transferred to other atoms and form oppositely charged ions. In ionic bond formation, the atoms that gain electrons become negatively charged and the atoms that loses electrons become positively charged. In the given example of Ca Cl2, Ca is also giving its 2 valence electrons to each Cl and there is no stable balance of attraction and repulsion between atoms.
Hence, the correct answer is:
1. Covalent Bond
2. Ionic Bond
Which set of data is more precise?
O 1, 2, 1, 2
O 1,1.5, 1.5, 1
O 0.5, 1, 2,1.5
O 1, 2, 2, 1.5
Answer:
01,1.5,1.5,1
Explanation:
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1. What is a food web?
A group of animals
a food chain with two levels
A producer and consumer relationship
how several food chains are related
Answer:
a producer and consumer relationship how several food chains and related.
Answer:
The answer is:
Explanation:
A food chain with two levels.
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What mantle is forced down and begins to melt?
HELP!
Answer:
magma
Explanation:
Answer:
magma rises through it.
Explanation:
What was Rutherford's model of the atom missing?
Answer:
The Rutherford atomic model stated that an atom is mostly an empty space that consist of nucleus and electrons, where nucleus is positively charged and electrons are negatively charged.
But Rutherford atomic model missed to add the quantum mechanics or energy level for electrons. Rutherford was unable to make understand the planetary movement of electrons around nucleus and later Bohr's model explained it.
Hence, Rutherford's model of the atom missed to explain the planetary movement of electrons around nucleus.
These organs are just containers for air?
Respiratory system
Calculate the density (g/ml) of mineral that has volume (total space occupied by something) of 3.8 ml and a mass of 22.4 g.
A- 5.9 g/ml
B- 85.1 g/ml
C- 0.17 g/ml
D- 26.2g/ml
Answer:
D
Explanation:
What is the solvent in a salt solution like
brine?
Answer:
in a salt solution, water is the solvent. during dissolving, particles of solvent collide with particles of solute. they sorround the particles of solute, gradually moving them away until the particles are evenly spread through the solvent.
Explanation:
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can someone please help me with this question for chemistry. What is the number of moles in 1216 g Sr3(PO4)2? the 3,4, and 2 and small numbers that go under the letters btw
A wavelength with a frequency of 14 HZ has a wavelength of 3 meters at what speed will this wave travel
Answer:
The speed will be 42 m/s
Explanation:
Wavelength is the minimum distance between two points on the wave that are in the same state of vibration. In other words, in a periodic wave the wavelength is the physical distance between two points from which the wave repeats.
Frequency (f) is the measure of the number of cycles or repetitions of the wave per unit of time. That is, it is the number of vibrations that occur in a unit of time. That is, how many peaks or valleys are repeated in a unit of time. If the unit of time is one second then the frequency is measured in Hertz (Hz).
The wavelength (λ) and the frequency (f) are two inversely proportional parameters and related by the propagation speed. The speed of propagation is the speed with which the wave travels, it is represented by the letter "v". The equation that links these three parameters is v = f * λ.
In this case:
f= 14 Hzλ= 3 mReplacing:
v= 14 Hz* 3 m
Solving:
v= 42 m/s
The speed will be 42 m/s
If the object is falling under the influence of gravity alone, this is called?
Answer: gravitational energy
Explanation: If you have a book on a table and it might fall, its using gravitational energy because its depending on gravity to choose rather it will fall or just balance. It also depends on how high the object is off the ground
What is the chemical formula for Tetrasulfur pentoxide?
Answer:
S 4 O 5
Explanation:
the 4 and 5 are little
Five moles of trucks would be____trucks.
Answer:
3.02x10²⁴
Explanation:
To solve this problem we need to use Avogadro's number: It is the number of units (usually atoms or molecules, in this case it's trucks) contained in one mol: 6.023x10²³.
We multiply the given number of moles times Avogadro's number:
5 * 6.023x10²³ = 3.02x10²⁴
So five moles of trucks would be 3.02x10²⁴ trucks.
What is the mass of 1.9 x 10^22 molecules of CaCO3?
3.2 g CaCO₃
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
1.9 × 10²² molecules CaCO₃
Step 2: Identify Conversions
Avogadro's Number
[PT] Molar Mass of Ca - 40.08 g/mol
[PT] Molar Mass of C - 12.01 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of CaCO₃ - 40.08 + 12.01 + 3(16.00) = 100.09 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 1.9 \cdot 10^{22} \ molecules \ CaCO_3(\frac{1 \ mol \ CaCO_3}{6.022 \cdot 10^{23} \ molecules \ CaCO_3})(\frac{100.09 \ g \ CaCO_3}{1 \ mol \ CaCO_3})[/tex]Multiply/Divide: [tex]\displaystyle 3.15794 \ g \ CaCO_3[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
3.15794 g CaCO₃ ≈ 3.2 g CaCO₃
Define unknown solutions
Answer:
A titration is a technique where a solution of known concentration is used to determine the concentration of an unknown solution. Typically, the titrant (the know solution) is added from a buret to a known quantity of the analyte until the reaction is complete
165g= ______________ kg
Answer:
Hi
Explanation:
Hi
What is the maximum number of electrons that an S orbital can have?
1 electron
2 electrons
4 electrons
3 electrons
How many minutes are in 180,0 days?
Answer:
259,200 minutes
Explanation:
In metallic bonds, electrons are referred to as electrons.
Answer:
Metallic bonding may be described as the sharing of free electrons among a lattice of positively charged metal ions. The structure of metallic bonds is very different from that of covalent and ionic bonds. ... In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize.