If you have done ODSSEYWARE please help 1. Why does air have weight ?

2. Because everything has weight

3. The force of gravity acts on the air molecules' mass

4. The pressure of the air molecules colliding with each other gives them weight

5. Air fills its entire volume, producing weight

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one