Answer:
Galena
Explanation:
Galena usually occurs in cubic crystals. If you hit a specimen of galena with a hammer it will shatter into small perfect cubic crystals. It has a metallic luster and a black to dark gray color and streak. Galena has a hardness of about 2.5 on the Mohs hardness scale which is about as hard as your fingernail.
Answer:
He felt happy and joyful endorphins make you happy and relaxed.
Explanation:
When you exercise, your body releases chemicals called endorphins. These endorphins interact with the receptors in your brain that reduce your perception of pain.They are manufactured in your brain spinal cord and many other parts of your body and are released in response to brain chemicals called neurotransmitters
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Answer:
O inadequate production of blood clotting factors
Explanation:
hemophilia is a condition in which your production of blood clotting factors is severely defective. this can cause excessive bleeding after injury.