Students investigated the balance of respiration and photosynethsis using an aquatic snail and some pondweed. The students set up four tubes, A, B, C, and D, as shown in the table below. The colour change in each tube, after 24 hours in the light is recorded. Explain why the indicator solution in Tube C turns yellow

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

Which process describes vaporization that takes place below the surface of a liquid? condensation melting boiling evaporation