Structures for Survival

Grade 4 Science Worksheet - Challenge Me

Circle the answer.

1. 1.

   A rose has sharp thorns on its stem. Which claim do the thorns support?

   • thorns help the rose make food
   • thorns help bees find the flower
   • thorns help the rose take in water
   • thorns help keep animals from eating the stem
2. 2.

   A runner's heart beats faster during a race. Why?

   • the muscles need more oxygen carried by blood
   • the lungs stop working during a race
   • the stomach needs to break down food faster
   • the brain needs less blood while running
3. 3.

   Which structure is internal?

   • the claws
   • the lungs
   • the skin
   • the feathers
4. 4.

   Which pair is one internal and one external structure that both help a bird get and use food?

   • heart and lungs
   • beak and stomach
   • eyes and feathers
   • feathers and skin
5. 5.

   Which observation is evidence that a turtle's shell protects it?

   • a turtle pulls its head into its shell when touched
   • a turtle swims slowly in a pond
   • a turtle's shell has a pattern of squares
   • a turtle lays eggs in sand