Bill Nye - Phases of Matter Worksheet | Pango - Free Printable
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Step-by-step solution for: Bill Nye - Phases of Matter Worksheet | Pango
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Show Answer Key & Explanations
Step-by-step solution for: Bill Nye - Phases of Matter Worksheet | Pango
Let’s go through each question one by one, thinking carefully about what we know from science — especially from Bill Nye’s fun and clear explanations about matter!
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1. List the three phases of matter.
We learn that matter can be in different forms depending on how its molecules are moving and arranged. The three main ones you see every day are:
i) Solid – like ice or a rock
ii) Liquid – like water or juice
iii) Gas – like air or steam
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2. What is needed to change the phase of matter?
To make something melt, freeze, boil, or condense, you need to add or remove heat energy. For example, heating ice turns it into water (melting), and cooling water turns it into ice (freezing). So, changing temperature (adding or removing heat) is what causes phase changes.
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3. What happens to the molecules of a compound when it changes state from liquid to solid?
When a liquid becomes a solid, the molecules slow down and get closer together. They start vibrating in place instead of sliding past each other. This makes the substance hold its shape — like water turning into ice cubes.
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4. How does a refrigerator cool food and drinks?
A fridge doesn’t “add cold” — it removes heat! Inside the fridge, there’s a special fluid that absorbs heat from the food and carries it outside (to the back or bottom of the fridge). As heat leaves the inside, the temperature drops, keeping your food cool.
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5. How is steam different from water vapour?
This is tricky because people often mix them up!
- Water vapour is invisible gas — it’s just water molecules floating in the air (like humidity).
- Steam is what you see when hot water boils — it’s actually tiny droplets of liquid water suspended in air (so it’s visible!).
So: Water vapour = invisible gas; Steam = visible mist made of tiny liquid drops.
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6. What is absolute zero?
Absolute zero is the coldest possible temperature — where all molecular motion stops completely. It’s at -273.15°C or 0 Kelvin. Nothing can get colder than this.
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7. Can scientists cool matter to absolute zero? Explain your answer.
No, they cannot reach absolute zero — but they’ve gotten super close! Why? Because as things get colder, it takes more and more energy to remove even tinier amounts of heat. Also, quantum physics says particles always have *some* motion, even at very low temps. So while scientists can get within billionths of a degree above absolute zero, they can never quite hit exactly zero.
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8. Explain the shape of:
a) Gases – Gases take the shape AND volume of their container. If you put gas in a balloon, it fills the whole balloon. If you release it, it spreads out everywhere.
b) Liquids – Liquids take the shape of their container but keep a fixed volume. Pour water into a cup — it matches the cup’s shape. Pour it into a bowl — it spreads out flat. But the amount (volume) stays the same.
c) Solids – Solids have their own fixed shape and volume. A brick stays brick-shaped no matter where you put it (unless you break it!).
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Final Answer:
1. i) Solid ii) Liquid iii) Gas
2. Adding or removing heat (energy)
3. Molecules slow down and lock into place, vibrating instead of flowing
4. It removes heat from inside using a coolant fluid that carries heat away
5. Water vapour is invisible gas; steam is visible mist made of tiny liquid water droplets
6. Absolute zero is -273.15°C — the temperature where all molecular motion stops
7. No — scientists can get very close but never reach it due to physical limits and quantum effects
8. a) Gases fill any container completely — no fixed shape or volume
b) Liquids take the shape of their container but keep fixed volume
c) Solids keep their own fixed shape and volume
---
1. List the three phases of matter.
We learn that matter can be in different forms depending on how its molecules are moving and arranged. The three main ones you see every day are:
i) Solid – like ice or a rock
ii) Liquid – like water or juice
iii) Gas – like air or steam
---
2. What is needed to change the phase of matter?
To make something melt, freeze, boil, or condense, you need to add or remove heat energy. For example, heating ice turns it into water (melting), and cooling water turns it into ice (freezing). So, changing temperature (adding or removing heat) is what causes phase changes.
---
3. What happens to the molecules of a compound when it changes state from liquid to solid?
When a liquid becomes a solid, the molecules slow down and get closer together. They start vibrating in place instead of sliding past each other. This makes the substance hold its shape — like water turning into ice cubes.
---
4. How does a refrigerator cool food and drinks?
A fridge doesn’t “add cold” — it removes heat! Inside the fridge, there’s a special fluid that absorbs heat from the food and carries it outside (to the back or bottom of the fridge). As heat leaves the inside, the temperature drops, keeping your food cool.
---
5. How is steam different from water vapour?
This is tricky because people often mix them up!
- Water vapour is invisible gas — it’s just water molecules floating in the air (like humidity).
- Steam is what you see when hot water boils — it’s actually tiny droplets of liquid water suspended in air (so it’s visible!).
So: Water vapour = invisible gas; Steam = visible mist made of tiny liquid drops.
---
6. What is absolute zero?
Absolute zero is the coldest possible temperature — where all molecular motion stops completely. It’s at -273.15°C or 0 Kelvin. Nothing can get colder than this.
---
7. Can scientists cool matter to absolute zero? Explain your answer.
No, they cannot reach absolute zero — but they’ve gotten super close! Why? Because as things get colder, it takes more and more energy to remove even tinier amounts of heat. Also, quantum physics says particles always have *some* motion, even at very low temps. So while scientists can get within billionths of a degree above absolute zero, they can never quite hit exactly zero.
---
8. Explain the shape of:
a) Gases – Gases take the shape AND volume of their container. If you put gas in a balloon, it fills the whole balloon. If you release it, it spreads out everywhere.
b) Liquids – Liquids take the shape of their container but keep a fixed volume. Pour water into a cup — it matches the cup’s shape. Pour it into a bowl — it spreads out flat. But the amount (volume) stays the same.
c) Solids – Solids have their own fixed shape and volume. A brick stays brick-shaped no matter where you put it (unless you break it!).
---
Final Answer:
1. i) Solid ii) Liquid iii) Gas
2. Adding or removing heat (energy)
3. Molecules slow down and lock into place, vibrating instead of flowing
4. It removes heat from inside using a coolant fluid that carries heat away
5. Water vapour is invisible gas; steam is visible mist made of tiny liquid water droplets
6. Absolute zero is -273.15°C — the temperature where all molecular motion stops
7. No — scientists can get very close but never reach it due to physical limits and quantum effects
8. a) Gases fill any container completely — no fixed shape or volume
b) Liquids take the shape of their container but keep fixed volume
c) Solids keep their own fixed shape and volume
Parent Tip: Review the logic above to help your child master the concept of bill nye phases of matter worksheet.
