Answer:
endo takes energy in and exo releases it out
Explanation:
1. Dry Ice (solid carbon dioxide)
2. Iodine
3. Arsenic
4. Naphthalene
UV rays can be found In the sun and in tanning beds.
UV rays can cause cancer (skin) if proper skin health is not happening (sunscreen)
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Answer:
new substances formed, as evidenced by the color changes and bubbles. Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.
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O = C = O Straight because there is no solitary electrons on C