Bill Nye Phases of Matter Answer Key - Free Printable
Educational worksheet: Bill Nye Phases of Matter Answer Key. Download and print for classroom or home learning activities.
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Step-by-step solution for: Bill Nye Phases of Matter Answer Key
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Step-by-step solution for: Bill Nye Phases of Matter Answer Key
Actually, there is no problem to solve in the image you uploaded — it’s a completed worksheet on the phases of matter and related concepts. The red text appears to be the correct answers already filled in by someone (perhaps a teacher or student).
Since you asked to “solve the problem and explain the solution,” I’ll treat this as a request to review and explain each answer so you can understand the science behind them.
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4. Getting things to change phases takes energy.
✔️ *Correct.*
Phase changes (melting, freezing, evaporation, condensation, etc.) require energy input or release. For example, melting ice requires heat energy to break molecular bonds.
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5. If you want to turn a liquid into a solid you have to take energy away.
✔️ *Correct.*
Freezing (liquid → solid) is an exothermic process — energy leaves the system. Molecules slow down and form a rigid structure.
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6. Where does the energy go from the things you put into a freezer? The freezer removes it and releases it into the air around it. It pumps the heat out into the room!
✔️ *Correct.*
A refrigerator/freezer uses a compressor and refrigerant to transfer thermal energy from inside the freezer to the outside environment (usually the kitchen). That’s why the back of your fridge feels warm.
---
7. What do you get when you fry ice? A solid turns into a liquid into a gas. Those are some pretty excited molecules!
✔️ *Correct.*
Frying ice means rapidly heating it:
Solid (ice) → Liquid (water) → Gas (steam).
“Excited molecules” = molecules gaining kinetic energy and moving faster.
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8. How cold is Liquid Nitrogen? -196°C. What percent of our air is Nitrogen? 78%
✔️ *Correct.*
Liquid nitrogen boils at -195.8°C (~-196°C) at standard pressure. Earth’s atmosphere is ~78% nitrogen gas (N₂).
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9. The heat from the air makes molecules move faster, get further and further apart and change from a liquid to a gas.
✔️ *Correct.*
Adding heat increases molecular motion. In liquids, molecules gain enough energy to overcome intermolecular forces → become gas (evaporation/boiling).
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10. Liquid Nitrogen makes molecules slow down, get closer together.
⚠️ *Partially misleading.*
Actually, liquid nitrogen cools things by absorbing heat — which slows down the molecules *of the object being cooled*. But in liquid nitrogen itself, molecules are already slowed down (that’s why it’s liquid).
Better phrasing: “Liquid nitrogen removes heat, causing surrounding molecules to slow down and pack closer together.”
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11. Now you know the three phases of matter. Solid like this ice, and liquid like this water, and gas like this water vapor.
✔️ *Correct.*
Classic examples:
- Solid: ice (fixed shape/volume)
- Liquid: water (fixed volume, takes container shape)
- Gas: water vapor (fills container, no fixed shape/volume)
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12. Suppose there was no motion at all, the molecules are absolutely stopped. This is what scientists call Absolute zero. That would be colder than anything you could ever imagine!
✔️ *Correct.*
Absolute zero = 0 Kelvin (-273.15°C). At this temperature, particles have minimal vibrational motion (quantum mechanics says they can’t be *completely* still due to zero-point energy, but classically, we say motion stops).
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13. Can you get to absolute zero? (Yes/No) ABSOLUTELY NOT EVER!
✔️ *Correct.*
Due to the Third Law of Thermodynamics, you can approach absolute zero asymptotically but never reach it. It’s physically impossible to remove *all* thermal energy from a system.
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14. Solid, liquid, gas, three phases of matter. Solid, molecules are moving slowly, packed close together. Liquid, molecules are moving a little faster, they are able to flow a little bit. Gas, molecules are moving very fast, they’re just wild! Three phases of matter!
✔️ *Correct.*
Summarizes molecular behavior well:
- Solids: low KE, tightly packed, vibrate in place.
- Liquids: moderate KE, slide past each other.
- Gases: high KE, chaotic motion, far apart.
---
15. How can you prove that invisible gas is matter? Weigh it!
✔️ *Correct.*
Matter has mass and volume. Even though gases are invisible, they have mass. Example: weigh a balloon before and after inflating — the inflated one is heavier because air (gas) has mass.
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16. When matter is in the gas phase, it takes the shape of its container. When matter is in the liquid phase, it takes the shape of its container. When matter is in the solid phase it holds its shape.
✔️ *Correct.*
This is a key distinguishing feature:
- Solids: maintain own shape.
- Liquids: conform to container bottom.
- Gases: expand to fill entire container.
---
This worksheet covers foundational concepts in thermodynamics and states of matter. All answers provided are scientifically accurate (with minor clarification needed for #10). The explanations reinforce how energy, molecular motion, and intermolecular forces govern phase changes.
If you’d like to test your understanding, try rewriting these answers in your own words — or ask me to generate a quiz based on this content!
Let me know if you want a printable version or diagrams to go with it. 😊
Since you asked to “solve the problem and explain the solution,” I’ll treat this as a request to review and explain each answer so you can understand the science behind them.
---
✔ Review & Explanation of Each Question
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4. Getting things to change phases takes energy.
✔️ *Correct.*
Phase changes (melting, freezing, evaporation, condensation, etc.) require energy input or release. For example, melting ice requires heat energy to break molecular bonds.
---
5. If you want to turn a liquid into a solid you have to take energy away.
✔️ *Correct.*
Freezing (liquid → solid) is an exothermic process — energy leaves the system. Molecules slow down and form a rigid structure.
---
6. Where does the energy go from the things you put into a freezer? The freezer removes it and releases it into the air around it. It pumps the heat out into the room!
✔️ *Correct.*
A refrigerator/freezer uses a compressor and refrigerant to transfer thermal energy from inside the freezer to the outside environment (usually the kitchen). That’s why the back of your fridge feels warm.
---
7. What do you get when you fry ice? A solid turns into a liquid into a gas. Those are some pretty excited molecules!
✔️ *Correct.*
Frying ice means rapidly heating it:
Solid (ice) → Liquid (water) → Gas (steam).
“Excited molecules” = molecules gaining kinetic energy and moving faster.
---
8. How cold is Liquid Nitrogen? -196°C. What percent of our air is Nitrogen? 78%
✔️ *Correct.*
Liquid nitrogen boils at -195.8°C (~-196°C) at standard pressure. Earth’s atmosphere is ~78% nitrogen gas (N₂).
---
9. The heat from the air makes molecules move faster, get further and further apart and change from a liquid to a gas.
✔️ *Correct.*
Adding heat increases molecular motion. In liquids, molecules gain enough energy to overcome intermolecular forces → become gas (evaporation/boiling).
---
10. Liquid Nitrogen makes molecules slow down, get closer together.
⚠️ *Partially misleading.*
Actually, liquid nitrogen cools things by absorbing heat — which slows down the molecules *of the object being cooled*. But in liquid nitrogen itself, molecules are already slowed down (that’s why it’s liquid).
Better phrasing: “Liquid nitrogen removes heat, causing surrounding molecules to slow down and pack closer together.”
---
11. Now you know the three phases of matter. Solid like this ice, and liquid like this water, and gas like this water vapor.
✔️ *Correct.*
Classic examples:
- Solid: ice (fixed shape/volume)
- Liquid: water (fixed volume, takes container shape)
- Gas: water vapor (fills container, no fixed shape/volume)
---
12. Suppose there was no motion at all, the molecules are absolutely stopped. This is what scientists call Absolute zero. That would be colder than anything you could ever imagine!
✔️ *Correct.*
Absolute zero = 0 Kelvin (-273.15°C). At this temperature, particles have minimal vibrational motion (quantum mechanics says they can’t be *completely* still due to zero-point energy, but classically, we say motion stops).
---
13. Can you get to absolute zero? (Yes/No) ABSOLUTELY NOT EVER!
✔️ *Correct.*
Due to the Third Law of Thermodynamics, you can approach absolute zero asymptotically but never reach it. It’s physically impossible to remove *all* thermal energy from a system.
---
14. Solid, liquid, gas, three phases of matter. Solid, molecules are moving slowly, packed close together. Liquid, molecules are moving a little faster, they are able to flow a little bit. Gas, molecules are moving very fast, they’re just wild! Three phases of matter!
✔️ *Correct.*
Summarizes molecular behavior well:
- Solids: low KE, tightly packed, vibrate in place.
- Liquids: moderate KE, slide past each other.
- Gases: high KE, chaotic motion, far apart.
---
15. How can you prove that invisible gas is matter? Weigh it!
✔️ *Correct.*
Matter has mass and volume. Even though gases are invisible, they have mass. Example: weigh a balloon before and after inflating — the inflated one is heavier because air (gas) has mass.
---
16. When matter is in the gas phase, it takes the shape of its container. When matter is in the liquid phase, it takes the shape of its container. When matter is in the solid phase it holds its shape.
✔️ *Correct.*
This is a key distinguishing feature:
- Solids: maintain own shape.
- Liquids: conform to container bottom.
- Gases: expand to fill entire container.
---
🎯 Final Summary
This worksheet covers foundational concepts in thermodynamics and states of matter. All answers provided are scientifically accurate (with minor clarification needed for #10). The explanations reinforce how energy, molecular motion, and intermolecular forces govern phase changes.
If you’d like to test your understanding, try rewriting these answers in your own words — or ask me to generate a quiz based on this content!
Let me know if you want a printable version or diagrams to go with it. 😊
Parent Tip: Review the logic above to help your child master the concept of bill nye phases of matter worksheet.
