exosphere is the outer layer of the atmosphere
Any of the pieces of hard whitish tissue making up the skeleton in humans and other vertebrates.
The calcified material of which bones consist
Answer:
7
Explanation
There are currently seven complete periods in the periodic table, comprising the 118 known elements. Any new elements will be placed into an eighth period; see extended periodic table.
A physical change would be A. Sawing a piece of wood in half because it's still the same. It would be a chemical reaction if the color of the wood would've changed.
Answer:
There are four rocky, or terrestrial, planets: Mercury, Venus, Earth, and Mars. These planets are called terrestrial planets because they are made up of rocks and metals and have solid surfaces.
Explanation:
