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2nd grade · Science · Unit 1 of 14

Solids & Liquids

Melting, freezing and steam

What your child practices

Sorting solids and liquids, describing melting, freezing and boiling, and changes that can or can't be undone.

Texas Essential Knowledge and Skills (TEKS) teks student expectation: 2.6(A) · classifying matter as solid or liquid by its properties

How we explain it

Children can open this short lesson before they practice.

  1. A solid keeps its shape, like a spoon or an ice cube.
  2. A liquid flows and takes the shape of its container, like juice.
  3. Warming melts solids into liquids. Cooling freezes liquids into solids.

Example: What happens to water in the freezer? The freezer is very cold. Cold turns liquid water into a solid. Answer: it freezes into ice

Solids & Liquids in Texas

In the Texas Essential Knowledge and Skills (TEKS), this is unit 1 of 14 in 2nd grade Science, before Changing Materials.

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

    What happens to a snowman on a warm sunny day?

    • ☃️It melts
    • 📏It grows taller
    • 🪵It turns to wood

  2. Question 2

    What happens to a puddle of water on a very cold day?

    • 🧊It can freeze into ice
    • 🧃It becomes juice
    • 🏖️It turns into sand

  3. Question 3

    What happens when you warm up butter?

    • 🧈It gets softer and melts
    • 🪨It turns into stone
    • 💨It becomes a gas right away

  4. Question 4

    Which one is a gas?

    • 🌬️the air we breathe
    • ✏️a pencil
    • 🧃orange juice

  5. Question 5

    Which can be undone: melting an ice cube or baking a cake?

    • 🧊melting an ice cube
    • 🪵burning a log
    • 🎂baking a cake

  6. Question 6

    Is it a solid or a liquid? Tap an item, then tap its basket.

    Sort into: 🧱 solid · 💧 liquid

    • 🍯honey
    • 🪨rock
    • 🍎apple
    • 🥛milk
    • 💧water
    • 📕book

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