7. Why is transpiration important for plants? 8. Draw a labelled diagram of the external structure of a leaf.
9. Name the male part of a flower. Draw its labelled diagram.
10. What are the advantages of dry cells?
11. What is the difference between a conductor and an insulator?
12. What are the two regions of a shadow?
13. What is the difference between a shadow and an image formed by plane mirror?
14. How has cactus modified itself to live in a desert?
15. Draw the structure of a flower and label its parts.

Identify two factors that determine the rate of stream erosion

In a set amount of time, a battery supplies 25j of energy to an electric circuit that includes two different loads. one of the loads produces 10 j of heat energy during this time interval. how much heat energy is produced by the second load in this time? explain your answer

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.