Environment and Traits

Grade 3 Science Worksheet - Challenge Me

Circle the answer.

1. 1.

   A student grows two bean plants from the same kind of seed, in the same pots, with the same water. One sits in a sunny window and one sits in a closet. What is being tested?

   • whether water affects how the plants grow
   • whether the pots affect how the plants grow
   • whether the kind of seed affects growth
   • whether sunlight affects how the plants grow
2. 2.

   A student grows two seedlings in the same light and soil, but waters one twice as often. What is being tested?

   • whether the kind of soil affects growth
   • whether the amount of light affects growth
   • whether the seedlings inherited different traits
   • whether the amount of water affects growth
3. 3.

   A student wants to test whether fertilizer makes tomato plants bigger. Which plan is a fair test?

   • same seeds, light and water; fertilizer for only one
   • different kinds of seeds, fertilizer for both
   • fertilizer and extra water for the same plant
   • same seeds, but one in sun and one in shade
4. 4.

   Plant 1 is in a warm room and plant 2 is in a cold room. Plant 1 also gets more water. Why is this not a fair test?

   • the plants are the same kind
   • only one condition changed
   • two conditions changed, so the cause is unclear
   • the rooms have the same light
5. 5.

   Pond A has 10 fish and pond B has 100 fish. The ponds are the same size. Use the graph. How much longer are the fish in pond A?

   • 2 cm
   • 7 cm
   • 21 cm
   • 14 cm
6. 6.

   Plant A was watered 1 time a week, plant B 3 times, and plant C 5 times. Use the graph. What pattern does it show?

   • more water gave shorter plants
   • water made no difference
   • more water gave taller plants in this test
   • plant B grew the most
7. 7.

   Plant A got 1 hour of sun a day, plant B got 3 hours, and plant C got 6 hours. Use the graph. Plant D gets 4 hours. About how tall will it grow?

   • about 10 cm
   • about 2 cm
   • about 7 cm
   • about 12 cm
8. 8.

   Why do scientists grow two plants of the same kind in the same soil and light, changing only the water?

   • so a growth difference comes from the water
   • so they can test two things at once
   • so the plants can use different pots
   • so the plants inherit different traits
9. 9.

   A gardener moves a pink hydrangea into soil like the soil where blue hydrangeas grow. What will most likely happen?

   • its flowers will turn white
   • its new flowers will turn blue
   • its new flowers will stay pink
   • its leaves will turn pink
10. 10.

    Pieces cut from one plant were planted low on a mountain and high on the mountain. The low ones grew tall and the high ones stayed short. Why is this good evidence that the environment affects height?

    • the pieces were planted in the same spot
    • plants grow taller near mountain tops
    • the pieces came from different parent plants
    • all the pieces came from one plant, so only the place differed