A physical change is a change which only affects the form of a substance, but not its chemical composition. So, a physical change in terms of particle arrangement states that particles do not change apart from gaining or losing energy. It can be explained using the examples of freezing and melting.
When a substance is solid, its particles like atoms and molecules are very tightly packed. These cannot move freely but when a substance is in liquid or gaseous state, the particles are loosely packed and can move freely. So when water is solid the particles are tight but when it is in liquid state same particles can move faster. Hence, particles are same but their energy has changed.
Answer: Two or more atoms joined together for a(n) molecule.
The answer is ATP loses one phosphate group and converts to ADP.
ATP stores potential energy in the form of chemical bond. By breaking this bond and removing one phosphate group from ATP, which is then converted to ADP, great amount of energy is released and it is ready to be used.
Answer:
C) decreased pressure in the pleural cavity.
Explanation:
The pleura is a membrane that surrounds the lung and consists of two membranes, the parietal and the visceral, which are continuous in the hilum region of the lung. The parietal and visceral membranes delimit, for each lung, an independent cavity fully lined by the mesothelium. Typically, this pleural cavity is virtual, containing only a thin layer of lubricating fluid (pleural fluid), allowing smooth sliding of these two membranes during respiration, preventing friction between the visceral and parietal mesothelium.
The visceral and parietal pleural membranes are usually held together due to decreased pressure in the pleural cavity.
The presence of the same fossils on different continents is evidence of continental drift.
The answer is fossils