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2nd grade · Science · Unit 5 of 14

Mixtures & Materials

Dissolve, sink, float, absorb

What your child practices

Mixing liquids and solids (dissolving, separating), what sinks or floats, and which materials soak up or push away water.

Texas Essential Knowledge and Skills (TEKS) teks student expectation: 2.6(A) · testing whether materials absorb water, sink or float, and choosing materials

How we explain it

Children can open this short lesson before they practice.

  1. Stirring things together makes a mixture.
  2. Some solids dissolve in water and seem to disappear, like sugar.
  3. Light things like a rubber duck float. Sponges soak up water.

Example: You stir sugar into water. What happens to the sugar? You can't see the sugar any more. It dissolves in the water. Answer: it dissolves

Mixtures & Materials in Texas

In the Texas Essential Knowledge and Skills (TEKS), this is unit 5 of 14 in 2nd grade Science, after Push & Pull and before Build, Test & Rebuild.

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: Texas Education Agency (TEA)

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 liquid always takes the shape of…

    • nothing
    • a cube
    • its container

  2. Question 2

    When you stir cocoa powder into milk, you make…

    • a new animal
    • a mixture
    • a rock

  3. Question 3

    Which job needs a material that absorbs water?

    • wiping up a spill
    • making a raincoat
    • building a boat

  4. Question 4

    When oil and water are mixed, what happens?

    • They stay separate
    • They become one smooth liquid
    • They turn solid

  5. Question 5

    Lemonade is made from water, lemon juice and sugar. It is a…

    🍋
    • solid
    • mixture
    • rock

  6. Question 6

    Which one is a liquid?

    • 🪵a block of wood
    • 🥛milk
    • 🧱a brick

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