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Vocabulary
Change
Properties
100

This word means "what something is made of" and can be solid, liquid, or gas.

Matter

100
  1. When a puddle of water slowly becomes water vapor and goes into the air, it is called _____.

Evaporate

100

Name one property you could observe about an apple (pick from color, shape, size, or texture).

Color (red)

200

A word for a substance that flows and takes the shape of its container.

  1. Liquid
200
  1. When ice melts into liquid water and later freezes back into ice, that kind of change is called _____.

Reversible

200

This property tells you how rough or smooth something feels.

  1. Texture
300

To mix something into a liquid so it seems to disappear is to _____.

  1. Dissolve
300

When you bake a cake and the batter changes into a solid cake that you cannot turn back into batter, that is called a(n) _____ change.

Irreversible

300

If a material can be stretched or bent and then goes back to its original shape, we say it is _____.

  1. Elastic or flexible (acceptable answers: elastic, flexible)
400

A person who designs things to solve problems (like building a bridge or a water filter).

  1. Engineer
400

If sugar disappears when stirred into warm tea but can be recovered by evaporating the water, is this change reversible or irreversible? Explain in one sentence.

  1. Reversible — because the sugar can be recovered after the water evaporates.
400

You are testing two materials to see which is better for a raincoat. Which property (from the list: absorbent, waterproof, stretchy) would you pick and why (one short sentence)?

  1. Waterproof — because it keeps water out and will keep the person dry.
500

A short word for a characteristic you can use to describe matter (for example, size, color, or texture).

  1. Property
500

Give one real-life example of a reversible change and one real-life example of an irreversible change (one sentence each).

Reversible — melting ice to water; Irreversible — baking a cake.

500

Describe how an engineer might use properties of materials to choose which one to build a toy car that must be light and strong (two short sentences).

An engineer would choose a light material (to make the car go faster) that is also strong (so it does not break). They might test samples to find a balance between lightness and strength.