Question # 9 Multiple Choice
The heart is made mostly of:

nervous tissue
nervous tissue

connective tissue
connective tissue

vascular tissue
vascular tissue

muscular tissue

Amixture with the same composition throughout is!

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

Which answer tells the reason the earth’s climate is getting warmer? too many animals are becoming extinct. large glaciers are melting in antarctica. the earth is moving closer to the sun. driving cars gives off gases that trap heat in the atmosphere.