2. It took 6 minutes for the altitude of the balloon to go from 200m to 400 m. What was the rate of change of the balloon?

Sarah is sitting at the top of the slide in the schools playground. which will increase sarah’s kinetic energy a- an additional child is added to the top of the slide. b- sarah is pushed and moves down the slide. c- sarah climbs down the ladder and off the slide. d- the ladder is moved to the other side of the yard.

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

The green colored pigment in chloroplasts is? a. nitrogen b. chlorophyll c. chlorophorm d. chlorofloromethane