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PIT_PIT [208]
3 years ago
6

The theory of plate tectonics describes the movement of continental plates across the Earth's surface as if they were riding on

a
conveyer belt of convection. Although the plate tectonic movement is extremely slow, there is evidence of this theory. Which
statements below support the theory of plate tectonics? Select ALL that apply.
A)Species became extinct more quickly at the end of the Cretaceous period.
B)99
Fossils of nearly identical species are found on both South America and
African continents.
C)Areas of subduction often have high seismic activity as one plate moves
under another plate.
D)Species become adapted to particular environments as random mutations
generate new phenotypes.
E)Marsupials existed on both North American and Australian continents
when these land masses were connected.
Chemistry
2 answers:
BlackZzzverrR [31]3 years ago
7 0

Answer:

The Answers are B, C, and E.

Explanation:

Fossils of nearly identical species are found on both South America and African continents. <em>Marsupials</em> existed on both North American and Australian continents when these land masses were connected. Areas of <em>subduction</em> often have high seismic activity as one plate moves under another plate. Since the continents were once joined, there is the likelihood that species originated in one location and then spread to other areas as the continents moved is likely. This explains the similarity of fossils or species in very geographically remote areas. The high activity of seismic movement also is best explained by plate movement.

emmainna [20.7K]3 years ago
3 0

Answer:

B and E

Explanation:

These two options support the theory of plate tectonics.

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The density of water at 4 degrees Celsius is 1.00 g/cm cubed at unknown object has density of 7.9 g/cm cubed would you expect it
NNADVOKAT [17]

Answer:

The object will be sank

Explanation:

In this case the object is more dense than water.

Density is the relationship between a certain amount of mass of matter and the volume that is being occupied by it.

The object occupies more volume, so it occupies more mass.

As the mass from the object is higher, the object will be sank because the weight is higher than the weight from the liquid.

If the object has a lower density than the water, it will float on it.

7 0
3 years ago
For each pair below, select the sample that contains the largest number of moles. Pair A 2.50 g O2 2.50 g N2
raketka [301]

Answer:

Explanation:

Pair  2.50g of O₂ and 2.50g of  N₂

The atoms sample with the largest number of moles since the masses are the same would be the one with lowest molar mass according the the equation below:

Number of moles = \frac{mass }{molarmass}

Atomic mass of O = 16g and N = 14g

Molar mass of O₂ = 16 x 2 = 32gmol⁻¹

Molar mass of N₂ = 14 x 2 = 28gmol⁻¹

Number of moles of O₂ = \frac{2.5}{32} = 0.078mole

Number of moles of N₂ = \frac{2.5}{28} =  0.089mole

We see that N₂ has the largest number of moles

4 0
3 years ago
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Papessa [141]

Answer:

all of them have seven valence electron

8 0
3 years ago
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If a radioactive material has a 10 year half-life, how much of a 100 g sample will be left after 30 years?
olga_2 [115]
12.5g, each 10 years you lose a half of what you have at that given moment

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3 years ago
Aluminum has a density of 2.70 g/cm3. what would be the mass of a sample whose volume is 10.0 cm3?
anastassius [24]
Hey there!

Density = 2.70 g/cm³

Volume = 10.0 cm³

Therefore:

Mass = density *  volume

Mass = 2.70 * 10.0

Mass = 27.0 g
3 0
3 years ago
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