Natural Hazards

Grade 4 Science Worksheet

Circle the answer.

1. 1.

   A town has $50,000 and two years for a flood plan. A levee costs $40,000 and takes one year. A tunnel costs $90,000 and takes three years. Which plan fits?

   • the tunnel, since it is bigger
   • the levee, since it meets both limits
   • neither, since both cost money
   • the tunnel, since it costs more
2. 2.

   Two school designs cost the same. Design A sits on rubber pads. Design B has extra windows. Which better keeps students safe in earthquakes?

   • Design B, since windows let people see out
   • Design A, since the pads soak up shaking
   • Design B, since glass makes it lighter
   • Design A, since rubber stops faults moving
3. 3.

   Lava flows down a volcano toward a farm. What harm can it cause?

   • It can freeze the crops in the fields.
   • It can pull the farm out to sea.
   • It can burn and bury the fields and barns.
   • It can blow the barns over with wind.
4. 4.

   A town near a volcano must keep falling ash out of its water tanks. It has little money. Which plan fits?

   • build a giant dome over the town
   • add more water to the tanks each day
   • move every tank to another state
   • put tight lids on the water tanks