Here is the completed worksheet with the correct answers filled in, followed by a detailed explanation for each answer.
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Completed Worksheet:
Why Does Matter Matter?
by Kelly Hashway
*(Word Bank: solids, volume, container, matter, ice, juice, gases, mass, atoms, chair, oxygen, melting, liquids, shape, space, milk, helium)*
1. The three basic properties of matter are
mass,
volume, and
shape.
2. All matter is made up of tiny particles called
atoms.
3. Volume is the amount of
space that matter takes up.
4. Mass is the amount of
matter an object has.
5. Liquids take the shape of their
container.
6.
Gases do not have a definite shape or volume.
7.
Liquids do not have a definite shape, but they do have a definite volume.
8.
Solids have a definite shape and volume.
9. A
chair and
ice are examples of solids.
10.
Juice and
milk are examples of liquids.
11.
Oxygen and
helium are examples of gas.
12. Solid ice is
melting when it is changing into a liquid.
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Explanation of Each Answer:
1.
Mass, Volume, Shape — These are the three fundamental physical properties used to describe and classify matter. Mass measures how much matter is present, volume measures how much space it occupies, and shape describes its form (which varies depending on state).
2.
Atoms — Atoms are the smallest units of ordinary matter that form chemical elements. All substances — solids, liquids, and gases — are composed of atoms or molecules (groups of atoms bonded together).
3.
Space — Volume is defined as the amount of three-dimensional space an object or substance occupies. For example, a box has a certain volume based on its length, width, and height.
4.
Matter — Mass is a measure of the amount of matter in an object. It’s different from weight, which depends on gravity. Mass remains constant regardless of location.
5.
Container — Liquids flow and conform to the shape of whatever container they are poured into. For instance, milk in a glass takes the shape of the glass; poured into a bowl, it takes the shape of the bowl.
6.
Gases — Gases expand to fill their entire container. They have no fixed shape or volume — they will spread out to occupy all available space.
7.
Liquids — Liquids have a fixed volume (you can’t compress them easily), but they do not have a fixed shape — they take the shape of their container.
8.
Solids — Solids maintain their own shape and volume. Their particles are tightly packed and vibrate in place, so they don’t flow like liquids or expand like gases.
9.
Chair and Ice — Both are solid at room temperature. A chair is a rigid object with fixed shape and volume. Ice is frozen water — also rigid and maintains its shape until it melts.
10.
Juice and Milk — Both are common examples of liquids. They pour, take the shape of their container, but maintain a constant volume.
11.
Oxygen and Helium — Both are gases at room temperature. Oxygen is essential for breathing; helium is lighter than air and often used in balloons. Gases have no fixed shape or volume.
12.
Melting — This is the phase change from solid to liquid. When ice (solid water) absorbs heat, it melts into liquid water. The word “melting” directly describes this process.
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✔ This worksheet helps students understand the states of matter (solid, liquid, gas) and their defining properties using everyday examples and key vocabulary.
Parent Tip: Review the logic above to help your child master the concept of science worksheet for 7th grade free.
