Why is it difficult to make models of objects in the solar system?

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.

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

Why is the statement not a hypothesis? sunflowers require soil and plenty of sunlight and water to grow and thrive.