Siphons - How Toilets Work

What is the main principle behind a siphon?

• It uses a pump to move water.

• It relies on gravity and pressure differences to move water.

• It requires electricity to function.

• It only works when air is trapped in the tube.

What role does the "short leg" and "long leg" of the siphon play?

• The short leg pulls the water out while the long leg provides extra air.

• The short leg holds the water, and the long leg uses its weight to pull the water down.

• The long leg pushes water, and the short leg creates a vacuum.

• Both legs need to be equal in length for the siphon to function.

Tags

NGSS.MS-PS2-4

What must happen for a siphon to start working?

• The tube must be partially filled with water.

• The tube must be completely filled with water.

• The tube must have air in it.

• The tube must be empty before adding water.

What causes the siphon to stop working?

• When the water in the short leg becomes heavier.

• When air enters the tube.

• When the long leg is shorter than the short leg.

• When the water source is higher than the siphon.

Tags

NGSS.MS-PS2-4

Which of the following is necessary for a siphon to function properly?

• A motor to push the water.

• A difference in height between the water source and the outlet.

• A sealed container at the end.

• A heater to warm the water.

Tags

NGSS.MS-PS2-4

What happens if the siphon tube is not completely filled with water?

• The siphon will work faster.

• The siphon will not start.

• The siphon will overflow.

• The siphon will create a vacuum.

Why is it important for the long leg of the siphon to be longer than the short leg?

• To ensure the water flows uphill.

• To create enough pressure to pull the water through.

• To allow air to enter the tube.

• To make the siphon lighter.

Tags

NGSS.HS-PS2-1

What is the role of gravity in the functioning of a siphon?

• It pushes the water up the tube.

• It pulls the water down the long leg.

• It stops the water from flowing.

• It creates air bubbles in the tube.

How can you restart a siphon that has stopped working?

• Add more air to the tube.

• Refill the tube completely with water.

• Shorten the long leg of the siphon.

• Use a pump to push the water.

Tags

NGSS.MS-PS2-4

How can you "manually" flush a toilet?

• Hold the handle down until the siphon starts.

• Pour water into the bowl to raise the water level above the siphon bend.

• Remove the toilet and dump out the contents.

• Trick question - you can't.