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2nd grade · Science · Unit 7 of 9

Build, Test & Rebuild

Plan it, build it, test it, take it apart and build again.

What your child practices

Practices engineering steps: asking questions to define a problem, sketching how a shape helps an object work, comparing two designs from test data, and seeing how an object made of small pieces can be taken apart and built into something new.

California Content Standards learning standard: K-2-ETS1-1; K-2-ETS1-2; K-2-ETS1-3; 2-PS1-3 · defining a problem, how shape helps an object work, comparing test data, and building new objects from the same pieces

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    Why does a boat have a pointed front?

    • To look sleepy
    • To move through water easily
    • To sink faster
    • To hold more rain

  2. Question 2

    Why does a chair have four legs?

    • So it is soft
    • So it can run
    • So it can float
    • So it stands steady

  3. Question 3

    A house made of blocks is taken apart. The blocks can build a…

    • bigger blocks
    • new object, like a car
    • only the same house
    • nothing ever again

  4. Question 4

    A test is fair when both designs get…

    • the same test
    • different tests
    • a guess
    • no test

  5. Question 5

    A sketch of your idea helps you…

    • make it heavier
    • lose the parts
    • plan before you build
    • skip testing

  6. Question 6

    Why might two people solve the same problem in different ways?

    • Engineers never share
    • There can be more than one good solution
    • Problems can't be solved
    • Only one answer is ever right

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