Answer:
True
Explanation:
Electromagnets can be switched on and off
Salt and pepper, soda, chocolate chip cookies, or a Twix™ candy bar, ... are all examples of heterogeneous mixtures<span>, where substances are not mixed on a molecular level.
</span><span>Water itself is an example of a homogeneous mixture. It often contains dissolved minerals and gases, but these are dissolved throughout the water. Tap water and rain water are both homogeneous, even though they may have different levels of dissolved minerals and gases.</span>
Convection is the circular motion that occurs as hotter air or liquid increases when the cooler air or liquid drops down, and has faster moving molecules, rendering it less dense. Convection currents within the earth shift layers of magma, and currents are formed by convection in the ocean.
Answer:
amounts
Explanation:
every surface has different amounts of friction
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Exothermic is the term for a reaction where energy is released.
