Mark is a doctor testing to see if his new medicine will people sleep better. he is measuring the amount of time people are in deep sleep during the study. he selects 100 30-50 year old people who reported they have trouble staying asleep. during the study the participant must go to bed at the same time and have an alarm set to wake up at the same time each day. they must also take the pill at the same time each day. fifty participants uabe actual new medicine and fifty take a fake pill to be used as comparison. the study last 30 days.
identity the part of experiment
what is the independent variable?
what is the dependent variable?
what are two constants?
what is the control?

chemical energy is stored in the chemical bonds of atoms and molecules. it can only be seen when it is released in a chemical reaction. when chemical energy is released, the substance from which the energy came is often changed into an entirely different substance.

this chemical reaction releases energy in the form of light and heat. chemical energy is the potential energy stored in the arrangement of atoms within molecules. breaking chemical bonds requires energy, while forming new chemical bonds releases energy.

the atp molecule can store energy in the form of a high energy phosphate bond joining the terminal phosphate group to the rest of the molecule. in this form,energy can be stored at one location, then moved from one part of the cell to another, where it can be released to drive other biochemical reactions.