Answer
four groups of students plan scientific investigations to answer four questions for the science fair.
which question would most likely be answered with an experimental investigation?

1. what kinds of plant life grew naturally in the town park?
2. what type of treats do different breeds of dogs like best?
3. do different types of grass affect how fare a ball rolls?
4. how are the chemicals in different vegetables similar?

Which process is involved in growing crops? irrigation transportation recreation condensation

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 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. 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 warm balloon expands and rises. the cold balloon shrinks and sinks.

24. how are vaccines used to keep people healthy?