2 years ago

Which layer of Earth is responsible for the movement of tectonic plates?

1 answer:

5 0

Convection currents in the mantle are what causes the movement of tectonic plates. As the extremely hot molten material from the mantle rises toward the crust, it cools enough to become denser and sink back into the hotter area of the mantle.

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7. if you kick a tennis ball with 50 N of force and then kick a soccer ball with 50 N of force,

BabaBlast [244]

Answer:

It depends of how heavy the object is so i would say the tennis ball would go the farthest. And the amount of air it has!

Explanation:

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3 years ago

On July 4, 2020, America turned 7.69 x 10^9

iogann1982 [59]

America's age = 243.85 years

<h3>Further explanation</h3>

When converting units, list and multiply all the units until you find the unit you want

Time unit conversion

1 year = 365 days

1 day = 24 hours

1 hour = 3600 s

7.69 x 10⁹ seconds to years :

$\tt =7.69\times 10^9~s\times \dfrac{1`hour}{3600~s}\times \dfrac{1~day}{24~hours}\times \dfrac{1~years}{365~days}\\\\=\dfrac{7.69\times 10^9}{3600\times 24\times 365}\\\\=\boxed{\bold{243.85~years}}$

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3 years ago

Which of the following describes an exothermic reaction?

Semmy [17]

Answer:

the answer is option D

Explanation:

exothermic reaction takes place when the energy required to break the bonds in the reactants is less than the energy released when new bonds are formed in the products.

7 0

3 years ago

The data shows the number of humans and western pond turtles in a particular county.

Masteriza [31]

The answer to this is C

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2 years ago

Atoms are not ______ or ____ during a chemical reaction.

RoseWind [281]

Answer:

Created or destroyed

Explanation:

to balance a chemical equation you must add coefficients

5 0

3 years ago