Science 8 - States of Matter Key | PDF - Free Printable
Educational worksheet: Science 8 - States of Matter Key | PDF. Download and print for classroom or home learning activities.
JPG
298×396
37.9 KB
Free · Personal Use
Quality Assured by Worksheets Library Team
Reviewed for educational accuracy and age-appropriateness
ID: #848317
⭐
Show Answer Key & Explanations
Step-by-step solution for: Science 8 - States of Matter Key | PDF
▼
Show Answer Key & Explanations
Step-by-step solution for: Science 8 - States of Matter Key | PDF
You’ve uploaded a completed “States of Matter Worksheet” with handwritten answers and a matching section. Let’s go through the worksheet step by step, verify the answers, and explain the concepts clearly.
---
## ✔ Section 1: Fill in the Blanks (Questions 1–10)
> ✔️ Correct.
> *Explanation:* Mass measures the quantity of matter in an object, usually in grams or kilograms. It does not change with location.
---
> ✔️ Correct.
> *Explanation:* Volume is the three-dimensional space occupied by a substance — solid, liquid, or gas. Measured in liters, mL, cm³, etc.
---
> ✔️ Correct.
> *Explanation:* This is the basic definition of matter — anything that occupies space and has mass.
---
> ✔️ Correct.
> *Explanation:* Adding thermal energy increases kinetic energy → particles vibrate, rotate, or move faster. This is why substances expand when heated.
---
> ✔️ Correct.
> *Explanation:* In solids, particles are tightly packed in fixed positions. They don’t flow but vibrate around their fixed points.
---
> ✔️ Correct.
> *Explanation:* Liquids have more freedom than solids — particles are close but can slide past one another, allowing liquids to flow and take the shape of their container.
---
> ⚠️ Partially correct.
> *Better answer for blank 2: “EXPANDS TO FILL ITS CONTAINER”*
> *Explanation:* Gas particles move rapidly and randomly in all directions. Because they’re far apart, gases expand to fill any container they’re in and are highly compressible.
---
> ✔️ Correct.
> *Explanation:* Removing energy reduces particle motion — this is why things cool down and may change state (e.g., gas → liquid → solid).
---
> ✔️ Correct.
> *Explanation:* This theory states that all matter is made of tiny particles in constant motion, and their behavior explains physical properties like pressure, temperature, and phase changes.
---
| Term | Letter | Description |
|--------|--------|-----------------------------------------------------------------------------|
| Mass | C | Amount of matter in an object |
| Solid | A | Anything that has mass and volume |
| Gas | D | Particles move randomly |
| Liquid | B | Amount of space an object takes up |
| Volume | E | Can be measured with a graduated cylinder or beaker |
> ✘ Mismatch Alert!
Let’s fix this:
- Mass → C ✔️ (Correct — mass = amount of matter)
- Solid → A? ✘ — “Anything that has mass and volume” is MATTER, not specifically solid.
- Gas → D ✔️ (Particles move randomly — yes!)
- Liquid → B? ✘ — “Amount of space…” is VOLUME
- Volume → E ✔️ (Measured with graduated cylinder — yes!)
✔ Correct Matching Should Be:
| Term | Letter | Description |
|--------|--------|-----------------------------------------------------------------------------|
| Mass | C | Amount of matter in an object |
| Solid | ? | *(Missing good match — none of the options perfectly describe solid)* |
| Gas | D | Particles move randomly |
| Liquid | ? | *(No perfect match — “slide past each other” isn’t listed)* |
| Volume | B | Amount of space an object takes up |
Wait — look at the descriptions again:
> A. Anything that has mass and volume → MATTER
> B. Amount of space an object takes up → VOLUME
> C. Amount of matter in an object → MASS
> D. Particles move randomly → GAS
> E. Can be measured with a graduated cylinder or beaker → VOLUME (also fits)
So:
- Mass → C ✔️
- Volume → B or E — both fit, but B is more direct definition.
- Gas → D ✔️
- Solid — should match with something like “particles vibrate in place” — but it’s not listed.
- Liquid — should match with “particles slide past each other” — also not listed.
➡️ Problem: The worksheet has a mismatch in matching. The best possible correct matches are:
- Mass → C
- Volume → B (or E — but B is definition, E is measurement tool)
- Gas → D
- Solid → ??? (no perfect match — maybe leave blank or note error)
- Liquid → ??? (same)
But since the student matched:
- Mass → C ✔️
- Solid → A ✘ (A = matter, not solid)
- Gas → D ✔️
- Liquid → B ✘ (B = volume)
- Volume → E ✔️ (measured with cylinder — acceptable, though not the definition)
This is a common worksheet error — the descriptions don’t perfectly align with the terms.
---
## 🧠 Summary & Corrections
✔ Correct Answers (with explanations):
1. Mass
2. Volume
3. Matter
4. Faster
5. Vibrate
6. Slide past each other
7. Move around randomly; Expand (to fill container)
8. Slower
9. Kinetic Molecular Theory
🔁 Matching Section — Best Possible Matches:
| Term | Correct Match | Reason |
|--------|---------------|--------|
| Mass | C | Definition: amount of matter |
| Volume | B | Definition: amount of space |
| Gas | D | Particles move randomly |
| Solid | — | No perfect match — description missing |
| Liquid | — | No perfect match — description missing |
⚠️ Note to Student/Teacher: The matching section has flawed options. “Anything that has mass and volume” describes matter, not solid. “Amount of space…” is volume, not liquid. Consider revising the worksheet or clarifying instructions.
---
## 🎓 Educational Takeaway:
Understanding states of matter involves knowing:
- How particles behave in solids (vibrate), liquids (slide), gases (random motion).
- The relationship between energy and particle motion.
- Definitions of mass, volume, and matter.
- The Kinetic Molecular Theory as the foundation for explaining these behaviors.
---
✔ Final Answer: Your worksheet is mostly correct except for minor issues in #7 (add “to fill its container”) and the matching section, which needs correction due to mismatched descriptions.
Let me know if you’d like a corrected version of the worksheet!
---
## ✔ Section 1: Fill in the Blanks (Questions 1–10)
1) Mass is the amount of matter that something has.
> ✔️ Correct.
> *Explanation:* Mass measures the quantity of matter in an object, usually in grams or kilograms. It does not change with location.
---
2) Volume is the amount of space that something takes up.
> ✔️ Correct.
> *Explanation:* Volume is the three-dimensional space occupied by a substance — solid, liquid, or gas. Measured in liters, mL, cm³, etc.
---
3) Anything that has mass and volume is called MATTER.
> ✔️ Correct.
> *Explanation:* This is the basic definition of matter — anything that occupies space and has mass.
---
4) When you add energy to matter, the particles move FASTER.
> ✔️ Correct.
> *Explanation:* Adding thermal energy increases kinetic energy → particles vibrate, rotate, or move faster. This is why substances expand when heated.
---
5) Particles in a solid are packed so close together they can only VIBRATE.
> ✔️ Correct.
> *Explanation:* In solids, particles are tightly packed in fixed positions. They don’t flow but vibrate around their fixed points.
---
6) Particles in a liquid can SLIDE PAST EACH OTHER.
> ✔️ Correct.
> *Explanation:* Liquids have more freedom than solids — particles are close but can slide past one another, allowing liquids to flow and take the shape of their container.
---
7) Particles in a gas can MOVE AROUND RANDOMLY and the matter EXPANDS.
> ⚠️ Partially correct.
> *Better answer for blank 2: “EXPANDS TO FILL ITS CONTAINER”*
> *Explanation:* Gas particles move rapidly and randomly in all directions. Because they’re far apart, gases expand to fill any container they’re in and are highly compressible.
---
8) When you remove energy from particles they move SLOWER.
> ✔️ Correct.
> *Explanation:* Removing energy reduces particle motion — this is why things cool down and may change state (e.g., gas → liquid → solid).
---
9) The KINETIC MOLECULAR THEORY explains how particles act when they’re spacing and movement change.
> ✔️ Correct.
> *Explanation:* This theory states that all matter is made of tiny particles in constant motion, and their behavior explains physical properties like pressure, temperature, and phase changes.
---
10) Match each Term on the left with the best Description on the right. Each description may be used once.
| Term | Letter | Description |
|--------|--------|-----------------------------------------------------------------------------|
| Mass | C | Amount of matter in an object |
| Solid | A | Anything that has mass and volume |
| Gas | D | Particles move randomly |
| Liquid | B | Amount of space an object takes up |
| Volume | E | Can be measured with a graduated cylinder or beaker |
> ✘ Mismatch Alert!
Let’s fix this:
- Mass → C ✔️ (Correct — mass = amount of matter)
- Solid → A? ✘ — “Anything that has mass and volume” is MATTER, not specifically solid.
- Gas → D ✔️ (Particles move randomly — yes!)
- Liquid → B? ✘ — “Amount of space…” is VOLUME
- Volume → E ✔️ (Measured with graduated cylinder — yes!)
✔ Correct Matching Should Be:
| Term | Letter | Description |
|--------|--------|-----------------------------------------------------------------------------|
| Mass | C | Amount of matter in an object |
| Solid | ? | *(Missing good match — none of the options perfectly describe solid)* |
| Gas | D | Particles move randomly |
| Liquid | ? | *(No perfect match — “slide past each other” isn’t listed)* |
| Volume | B | Amount of space an object takes up |
Wait — look at the descriptions again:
> A. Anything that has mass and volume → MATTER
> B. Amount of space an object takes up → VOLUME
> C. Amount of matter in an object → MASS
> D. Particles move randomly → GAS
> E. Can be measured with a graduated cylinder or beaker → VOLUME (also fits)
So:
- Mass → C ✔️
- Volume → B or E — both fit, but B is more direct definition.
- Gas → D ✔️
- Solid — should match with something like “particles vibrate in place” — but it’s not listed.
- Liquid — should match with “particles slide past each other” — also not listed.
➡️ Problem: The worksheet has a mismatch in matching. The best possible correct matches are:
- Mass → C
- Volume → B (or E — but B is definition, E is measurement tool)
- Gas → D
- Solid → ??? (no perfect match — maybe leave blank or note error)
- Liquid → ??? (same)
But since the student matched:
- Mass → C ✔️
- Solid → A ✘ (A = matter, not solid)
- Gas → D ✔️
- Liquid → B ✘ (B = volume)
- Volume → E ✔️ (measured with cylinder — acceptable, though not the definition)
This is a common worksheet error — the descriptions don’t perfectly align with the terms.
---
## 🧠 Summary & Corrections
✔ Correct Answers (with explanations):
1. Mass
2. Volume
3. Matter
4. Faster
5. Vibrate
6. Slide past each other
7. Move around randomly; Expand (to fill container)
8. Slower
9. Kinetic Molecular Theory
🔁 Matching Section — Best Possible Matches:
| Term | Correct Match | Reason |
|--------|---------------|--------|
| Mass | C | Definition: amount of matter |
| Volume | B | Definition: amount of space |
| Gas | D | Particles move randomly |
| Solid | — | No perfect match — description missing |
| Liquid | — | No perfect match — description missing |
⚠️ Note to Student/Teacher: The matching section has flawed options. “Anything that has mass and volume” describes matter, not solid. “Amount of space…” is volume, not liquid. Consider revising the worksheet or clarifying instructions.
---
## 🎓 Educational Takeaway:
Understanding states of matter involves knowing:
- How particles behave in solids (vibrate), liquids (slide), gases (random motion).
- The relationship between energy and particle motion.
- Definitions of mass, volume, and matter.
- The Kinetic Molecular Theory as the foundation for explaining these behaviors.
---
✔ Final Answer: Your worksheet is mostly correct except for minor issues in #7 (add “to fill its container”) and the matching section, which needs correction due to mismatched descriptions.
Let me know if you’d like a corrected version of the worksheet!
Parent Tip: Review the logic above to help your child master the concept of science 8 states of matter worksheet key.
