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# Freezing micro-lesson

Do you struggle with balancing your kids’ screen time with their education? Say hello to 1Question, the app that solves this problem with a fun twist! Our app lets your child earn screen time minutes in their favourite apps by watching educational videos and correctly answering quiz questions. And the best part? You get to decide which apps to lock behind learning using 1Question.

## Learning time​

Kids learn by watching short, engaging video lessons.

Freezing is the process where a liquid changes into a solid. Freezing happens when an object loses its heat so it's being cooled down. This causes the particles in the liquid to form tighter bonds which we know make a solid. Now, every liquid has a freezing point at which freezing happens. One example of freezing is when water turns into ice. Now, the freezing point for water is 0 degrees. So, water turns into ice at 0 degrees. But different liquids have different freezing points. Now, freezing is a reversible process, and the opposite of freezing is melting. So, we know that different liquids freeze at different temperatures. Well, they have different freezing points, but why? Because different liquids have different levels of viscosity. Now, that just means how thick a liquid is. And we can see how thick a liquid is by seeing how easily it flows or pours. So, thicker liquids take longer to freeze and have a lower freezing point. It needs to be much colder. So, the highest viscosity will have the lowest freezing points.

Kids earn more screen time by answering fun educational questions.

Here are some example of questions about this video that kids may be asked in the 1Question app to earn screen time.

• #### A high viscosity liquid (thick) takes longer to freeze and has a _______ freezing point

1) lower (colder)
2) higher (warmer)

1) No
2) Yes

1) heat
2) particles
3) space
4) liquid
• #### Freezing is a

1) process
2) state of matter
3) temperature
• #### Freezing is a process where which state of matter changes to which state of matter?

1) Liquid changes to solid
2) solid changes to liquid
3) liquid changes to gas
4) gas changes to solid
• #### What happens to particles from liquids when freezing occurs?

1) Form tighter bonds
2) get bigger
3) get further apart
4) shrink
• #### What is the name for the temperature in which freezing happens?

1) freezing point
2) boiling point
3) ice point
4) ice

1) 0
2) 15
3) -10
4) 8
• #### what term refers to the thickness of a liquid?

1) Viscosity
2) degrees
3) pourability
4) carbonation

1) Honey
2) Vinegar
3) Milk
4) Shampoo

## Recreational screen time

Kids can use the screen time minutes they earned to unlock the apps selected by their parent e.g. games, social media, streaming, etc.

## Out of time

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## Meet your educator

Our micro-courses are developed and delivered by qualified educators from around the world.

#### Georgina Mullin

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