Weathering and Erosion

Grade 4 Science Worksheet

Circle the answer.

1. 1.

   A student claims ice cracks rock with cold alone. Which result shows something else is needed?

   • wet rock in a freezer cracks
   • warm rock does not crack
   • rock in a warm room stays the same
   • dry rock in a freezer does not crack
2. 2.

   A desert rock has a hard top layer and a soft lower layer. Over time it becomes mushroom-shaped. Why?

   • the soft layer is eroded by ice only
   • wind-blown sand wears the soft lower layer faster
   • the hard top layer grows wider
   • rain builds up the top layer
3. 3.

   Two hillsides get the same rain. Hill A is covered in trees. Hill B was cleared. Which hill loses more soil?

   • both lose the same
   • Hill A
   • neither loses soil
   • Hill B
4. 4.

   Why is erosion faster on a steep hill than on a flat field?

   • water cannot move on flat land
   • steep hills have stronger soil
   • gravity makes water run downhill faster
   • flat fields have more rain
5. 5.

   A sidewalk crack has water in winter and weeds in summer. Which explains why the crack grows all year?

   • erosion moves the sidewalk away in winter
   • ice widens it in winter and roots widen it in summer
   • the sun melts it in summer only
   • wind fills it in winter and rain fills it in summer