1. where does the conversation current in the mantle obtain its heat energy?

a. earths core and crust
b. earths mantle
c. earths core and mantle***
d. earths mantle

2. How do convection currents cause movement of earth's plates?

a. The weathering of rocks in Earth's mantle cause plates to move.
b. The entire cycle of heating, cooling, rising, and sinking of rocks in Earth's mantle causes plates to move.***
c. Convection currents transfer radiation energy to Earth's plates, which causes them to move.
d. Convection currents in the Earth's core and crust cause Earth's plates to move

3. How does cycling of matter occur in Earth's mantle?

a. Hot, soft rock rises from the bottom of the mantle toward the top, cools, and sinks back through the mantle.***
b. Hot, soft rock sinks to the mantle, cools, and rises to Earth's crust.
c. Solid rock rises from the bottom of the mantle, cools, and sinks back through the mantle.
d. Solid rock sinks to Earth's core and then rises to form lava

4. what happens when you touch cold ice with your warm hand?

a. heat only transfers from the ice to your hand
b. heat only transfers from your hand to the ice***
c. heat transfers from the ice to your hand and from your hand to the ice
d. heat does not transfer between the ice and your hand

c

b
a
b

100%

they are all right

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Just took test, all correct

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Appreciate the help man, thanks :)

1. The correct answer is c. Earth's core and mantle. The heat energy for the convection currents in the mantle comes from both the Earth's core and mantle. The core is composed of extremely hot, molten metal, primarily iron and nickel. This heat is continuously transferred to the surrounding mantle through conduction. Additionally, radioactive decay of certain elements within the mantle also produces heat energy, contributing to the overall heat budget of the mantle.

2. The correct answer is b. The entire cycle of heating, cooling, rising, and sinking of rocks in Earth's mantle causes plates to move. Convection currents are responsible for the movement of tectonic plates. These convection currents are set in motion by the cyclic process of heating and cooling within the Earth's mantle. As the hot, less dense material in the mantle rises, it creates a buoyant force that pushes the tectonic plates apart. Meanwhile, the cooler, denser material sinks back down, pulling the plates along with it. This continuous cycle of rising and sinking convective flow causes the plates to move over time.

3. The correct answer is a. Hot, soft rock rises from the bottom of the mantle toward the top, cools, and sinks back through the mantle. Cycling of matter in Earth's mantle occurs through a process called mantle convection. In this process, hot, soft rock near the bottom of the mantle is heated by the underlying core and becomes less dense. This hot rock rises towards the surface, carrying heat energy with it. As it rises, it cools and becomes denser, eventually sinking back down towards the bottom of the mantle. This cyclic movement of hot rock rising and cooled rock sinking facilitates the cycling of matter within the mantle.

4. The correct answer is b. Heat only transfers from your hand to the ice. When you touch a cold object, such as ice, with your warm hand, heat energy flows from your hand to the ice, seeking to establish thermal equilibrium. Heat always flows from a warmer object to a colder one. In this case, the ice absorbs the heat energy from your hand, causing the ice to melt and your hand to feel cold. Heat transfer occurs through conduction, where molecular collisions transfer kinetic energy (heat) from the higher temperature object (your hand) to the lower temperature object (ice).