I need help red is carbohydrates
orange is lipids
blue is proteins

green is nucleic acids

d bonding propertys

explanation:

carbon can form so many different compounds not just with oxygen

a chair, a bed, and a toothbrush

explanation:

i was told this before by a teacher, so yeah

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.