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2nd grade · Science · Unit 4 of 11

Objects & Structures

Jobs, materials and fasteners

What your child practices

Structures that hold up a load, what everyday objects are for, how fasteners join things, and where materials such as wood and wool come from.

Alabama Course of Study content standard: 2.2; 2.3 · what structures are made of and how their parts fit together

How we explain it

Children can open this short lesson before they practice.

  1. Objects have jobs. Boots protect feet. Hats keep heads warm.
  2. Pick a material for its property: wool is soft and warm, steel is strong.
  3. Structures, like bridges, must be strong to hold a load.

Example: A bridge must hold cars. Which property matters most? Cars are heavy. The bridge must be strong. Answer: strong

Objects & Structures in Alabama

In the Alabama Course of Study, this is unit 4 of 11 in 2nd grade Science, after Mixtures & Materials and before Plants, Seeds & Pollinators.

Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.

Source: Alabama State Department of Education (ALSDE)

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

    A bridge must hold cars. Which property helps most?

    🌉
    • soft
    • see-through
    • strong

  2. Question 2

    Which one fastens a button on a coat?

    • a magnet
    • a thread
    • a rock

  3. Question 3

    What is the job of a chair?

    🪑
    • to make light
    • to hold you up
    • to tell time

  4. Question 4

    Which fastener holds a board to a wall?

    • a screw or nail
    • a feather
    • glue on the floor

  5. Question 5

    Which one fastens two papers together?

    📎
    • a staple
    • a pencil
    • a sponge

  6. Question 6

    Where does wood come from?

    🌲
    • trees
    • oceans
    • clouds

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