How is an electromagnet different from a permanent magnet?

a. it has only north magnetic poles.
b. it has only south magnetic poles.
c. there is no magnetic field.
d. it can be turned on and off.

a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.

yes

no

blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.