If you have done ODSSEYWARE please help 1. Why does air have weight ?

2. Because everything has weight

3. The force of gravity acts on the air molecules' mass

4. The pressure of the air molecules colliding with each other gives them weight

5. Air fills its entire volume, producing weight

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%

Blank is a rock with a find dark texture that makes up the oceanic crust

Me asap i need during photosynthesis, the following reaction takes place: carbon dioxide + water + light energy → sugar + oxygen during cellular respiration, the following reaction takes place: sugar + oxygen → carbon dioxide + water + chemical energy given this information, how are photosynthesis and cellular respiration related? question 2 options: a the products of photosynthesis are the reactants of cellular respiration. b photosynthesis and cellular respiration both start with the same materials. c photosynthesis and cellular respiration both produce the same materials. d the same type of energy is found in both photosynthesis and cellular respiration.