Design and Test a Solution

Grade 4 Science Worksheet - Challenge Me

Circle the answer.

1. 1.

   A ramp for a toy wheelchair must be gentle enough to roll up and fit in a 30 cm space. Test: gentle but 45 cm long. What is the best next step?

   • cut it to 30 cm and make it steep
   • make it steeper but keep 45 cm
   • say it works because it is gentle
   • add a turn so the ramp fits in 30 cm
2. 2.

   Materials: one shoe box, cotton balls, foil. Goal: keep an ice cube for 60 minutes. Which plan stays within the materials?

   • put the ice in a freezer bag in a cooler
   • cover the box with bubble wrap
   • line the box with foil and pack cotton around the ice
   • wrap the ice in a wool sock
3. 3.

   Which problem statement gives the best criteria and constraints?

   • make a cool watering thing for the plants
   • water the plants using lots of different stuff
   • keep 3 seedlings watered for a week using one 2-liter bottle
   • help the class plants somehow this month
4. 4.

   A school garden needs a fence that keeps rabbits out and costs under $50. Which is a criterion?

   • rabbits cannot get into the garden
   • the fence costs under $50
   • the fence uses only wood from the shed
   • the fence is built in one weekend