26. What might happen if a tropical rainforest receives little rain for a long period of time?
A. Flood might occur.
B. There will be fresh air to breathe.
C. There will be an increase in population of both plants and animals.
D. The area will be very dried up and lots of crops that need lots of water will die.
27. What is friction?
A. force that pushes or pulls.
B. force needed to move something.
C. energy when something is pushed.
D. force that one exerts on another when rubbed together.
28. What increases friction?
A. more speed
B. rough surfaces
C. smooth surfaces
D. more surface area
29. Which force is acting on falling leaves?
A. Gravity
B. Friction
C. Falling Force
D. Pushing Force
30. Imagine you travel to another planet. What will change as you walk around the surface of the planet;
your mass or your weight?
A. Mass
B. Weight
C. Weight and mass
D. Neither​