Texas TEKS4th GradeScience

§112.6.b.6.AClassify and describe matter using observable

Matter and energy · b.6: Matter and energy. The student knows that matter has measurable physical properties that determine how matter is identified, classified, changed, and used. The student is expected to:

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What this standard means: TEKS §112.6.A asks fourth graders to classify and describe matter by what they can observe: temperature, mass, magnetism, relative density, and physical state. This intervention, Matter Detectives, practices that skill through eight multiple-choice scenarios rather than definitions alone. Students judge whether a thermometer beats touch for temperature, why a heavy log can still float, which metals a magnet actually picks up, and how mass differs from weight. Each question forces a choice between a correct observation and a common misconception, such as assuming touch measures temperature accurately. With repetition, students build the habit of naming the specific observable property behind a claim about matter instead of guessing from appearance alone.

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Time to run
About 13 minutes. 5 min lesson, then 8 min of practice.
In the download
6 printable pages: the full lesson, the worked examples, the visual models, and 8 practice questions with space to work. A teacher answer key is included at the end, so the student pages come first and it is still ready to hand out. The lesson’s worked examples do show their solutions, because that is how they teach.
Question set
The download carries all 8 questions. The page shows 3 of them as a sample.
Question format
Every question is multiple choice. Students show their work on the page.
Dates
Published August 6, 2026. Not revised since.

The sample intervention

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§112.6.b.6.A

Matter Detectives: Spiral Review Check

Classify and describe matter using what you can observe: temperature, mass, magnetism, relative density, and physical state.

Read the passages and examples below to learn about how matter can be classified by what you observe.

Matter is anything that has mass and takes up space. We can describe matter by looking at its physical properties, which are features you can observe or measure.
Observable properties of matter

Matter can be described by physical properties you can observe or measure.

Temperature tells how hot or cold something is. Use a thermometer to measure temperature instead of only touching an object, because touch can be misleading.
Five properties you can observe
What it tells youHow you check it
temperaturehow hot or cold it isuse a thermometer
masshow much matter is in ituse a balance, in grams
magnetismwhether a magnet pulls ithold a magnet near it
relative densitywhether it floats or sinksput it in water
physical statesolid, liquid, or gaslook at its shape and flow

Each property has its own test. Match the clue in the question to the right property.

Worked exampleA magnet picks up an iron nail even through a sheet of paper, but it cannot pick up a rubber eraser or a wooden craft stick.
Worked examplePumice is a rock filled with tiny air pockets. A large piece of pumice can float, while a much smaller pebble sinks — sinking and floating depend on density, not on how heavy the object is.

Practice questions

  1. 1

    Which property tells how hot or cold something is?

    • Mass
    • Temperature
    • Relative density
    • Magnetism
  2. 2

    A student says, 'This block feels cooler, so it must have a lower temperature.' What is the best correction?

    • The student is wrong because a thermometer should be used instead of touch.
    • The student is right because cooler-feeling objects always have the same temperature.
    • The student is wrong because weight tells temperature.
    • The student is right because touch is the best way to measure temperature.
  3. 3

    Two objects are made of different materials. Object A has more mass than Object B, but both fit in one hand. Which statement best describes the matter in Object A?

    • Object A has less matter because it fits in one hand.
    • Object A has more matter because it has greater mass.
    • Object A and Object B must have the same mass.
    • Object A cannot be compared because it is made of a different material.

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