Asteam flows from high elevation to low elevation very quickly, has steep canyon walls, and rapidly moving water. what type of stream is it? a. old stream b. mature stream c. youthful stream d. rejuvenated stream

Describe different biomes. what are some adaptations that organisms (plants or animals) must have to live in each biome?

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .

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? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.