Bill Nye Video Worksheet on Buoyancy with educational content and diagrams.

It looks like you've uploaded a worksheet titled "Bill Nye Video Worksheet - Buoyancy", which is based on the Bill Nye video about buoyancy. The worksheet contains 11 questions related to the concepts of buoyancy, displacement, and density. I'll solve each question and explain the answers clearly.

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Bill Nye Video Worksheet – Buoyancy

#### 1. The reason why some things float or sink is because water is _________.
Answer: *Denser than the object* (or more accurately: *more dense than the object*)

Explanation: Objects float or sink depending on their density compared to the fluid they are in. If an object is less dense than water, it floats; if it's more dense, it sinks.

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#### 2. If you were to weigh the water displaced by a boat, the water would be equal to the weight of the _________.
Answer: *Boat*

Explanation: This is Archimedes’ Principle: The buoyant force on an object is equal to the weight of the fluid it displaces. So, for a floating boat, the weight of the displaced water equals the weight of the boat.

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#### 3. What is displacement?
Answer: *The amount of fluid pushed aside by an object submerged in it.*

Explanation: Displacement refers to the volume of fluid that is moved when an object is placed in it. For example, when a boat floats, it displaces a volume of water equal to its own weight.

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#### 4. Objects displace as much water as they _________.
Answer: *Displace* (This seems incomplete—likely meant to be: "Objects displace as much water as they weigh.")

But based on context, a better interpretation is:
Answer: *Are submerged* or *occupy in volume* — but the most accurate completion is:

✔ "Objects displace as much water as they weigh."

Wait — actually, this is tricky. The correct version is:

👉 "Objects displace as much water as they occupy in volume."
Or more precisely: *"Objects displace a volume of water equal to the volume of the part of the object submerged."*

But looking at standard phrasing from the Bill Nye video, the intended answer is likely:

Answer: *Are submerged* or *take up space*

However, the best fit for the sentence structure is:

Answer: *Take up* → “Objects displace as much water as they take up.”

But technically, it’s volume that is displaced.

✔ Correct answer: *Displace a volume of water equal to the volume of the submerged part of the object.*

But since the blank is short, likely expected answer is:
Answer: *Weigh* — but that’s not quite right.

Wait — rechecking: In Archimedes' principle, weight of displaced fluid = weight of object (if floating).

So, the sentence might mean:
"Objects displace as much water as they weigh." — meaning the weight of the displaced water equals the weight of the object.

✔ So the best answer is: weigh

✔️ Answer: *weigh*

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#### 5. Floating and Sinking: Why does the tennis ball that is cut in half float higher in the water than the tennis ball that isn’t cut in half?
Answer: *Because cutting it in half increases its surface area and allows it to displace more water relative to its weight, increasing buoyancy.*

But more accurately:
Answer: *Because the cut tennis ball has more surface area exposed, allowing it to displace more water, which increases the upward buoyant force.*

Actually, a better explanation:
When the tennis ball is cut in half, it can sit flat on the water, displacing more water with the same mass. This increases the buoyant force, so it floats higher.

✔ Answer: *Because the cut half can displace more water, creating greater buoyant force, so it floats higher.*

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#### 6. EUREKA is Greek for “__________.”
Answer: *I have found it!*

Explanation: Archimedes famously shouted "Eureka!" when he discovered the principle of displacement while taking a bath.

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#### 7. When something sinks we say it is _________ buoyant.
Answer: *Negatively*

Explanation: An object that sinks is negatively buoyant — meaning the buoyant force is less than the object’s weight.

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#### 8. When something floats we say it is _________ buoyant.
Answer: *Positively*

Explanation: A floating object is positively buoyant — the buoyant force exceeds or balances the weight.

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#### 9. When something does not sink or float, we say it is _________ buoyant.
Answer: *Neutrally*

Explanation: Neutrally buoyant objects neither sink nor float — they stay suspended in the fluid. Example: a submarine at neutral depth.

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#### 10. Scuba diving is all about buoyancy. What do scuba divers use to change their buoyancy?
Answer: *Buoyancy control device (BCD) or weights and air in the BCD*

Explanation: Divers adjust the amount of air in their BCD (buoyancy compensator device) to become more or less buoyant. They also use weights to help them sink.

✔ Answer: *Buoyancy compensator (BCD)*

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#### 11. Hot air is __________ dense than its surrounding air.
Answer: *Less*

Explanation: Hot air expands and becomes less dense than cooler air, so it rises. This is why hot air balloons float.

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✔ Final Answers Summary:

1. Denser than the object
2. Boat
3. The amount of fluid pushed aside by an object submerged in it
4. Weigh *(Note: This is a bit misleading; better phrased as "displace a volume of water equal to their submerged volume")*
5. Because the cut half displaces more water, increasing buoyant force
6. I have found it!
7. Negatively
8. Positively
9. Neutrally
10. Buoyancy compensator (BCD)
11. Less

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