1) Indicar v o f, en caso de ser falso cambia la palabra subrayada por la correcta. a) Los cambios físicos ocurren cuando las sustancias iniciales = sustancias finales.

b) Los cambios físicos ocurren cuando las sustancias iniciales = sustancias finales.

c) Cuando se quema un papel se produce un cambio químico.

d) Al fundir el oro para hacer un anillo ocurre un cambio químico.

Why do you suppose the structural polysaccharide cellulose does not contain branches? why do you suppose the structural polysaccharide cellulose does not contain branches? branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby decreasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby increasing the rigidity and strength of the microfibrils. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby increasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby decreasing the rigidity and strength of the microfibrils.

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?