1Question

# How Waves Change with Tidal Changes 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.

This lesson is about tides and how they change. This affects surf waves because surfers need a tide that is right for each surf spot which is usually around 1 to 2 meters. First, I'll talk about daily tidal changes. Each day, there are two high tides and two low tides. This is caused by the gravity of the moon dragging one big wave across the surface of the earth. The moon's gravitational pull creates two high tides here and here and two low tides here and here. So, this creates daily tide. The moon revolves around the earth once a month and the sun and moon's tidal pull affect each other. When the moon and sun are perpendicular like this, this is called a neap tide and has very small tidal changes because the pull of the moon and the pull of the sun almost cancel each other out and tidal changes can be really small. This position of the moon and earth is called a spring tide and has big tidal changes. This happens because the sun and moon align and pull tides in the same direction making the pull stronger. This alignment also happens twice a month. So, surfers who understand all of this have an easier time picking the best tides and time to surf.

Kids earn more screen time by answering fun educational questions.

• #### How deep should a reef be for a 1 meter wave to break over it?

1) 1.3 meters
2) 2 meters
3) 2.4 meters
4) 3 meters
• #### What size wave will break when the reef is 1.3 meters deep?

1) 1 meter
2) 2 meters
3) 2.4 meters
4) 3 meters
• #### Mid-tide waves are best at what tide?

1) Mid-tide
2) Low tide
3) High tide
4) Spring tide

1) No
2) Yes

1) Yes
2) No

1) Yes
2) No

## 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

When screen time minutes run out, kids are locked out and need to complete more learning in 1Question to earn more time.

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

#### Sarah Sanchez Medrano

More lessons from the micro-course

##### Angles of the Reef and How they Change the Wave

This lesson is about angles of the reef and how they create surf waves. Waves…

##### What makes good waves? Physics of Wave Trains

What makes good waves to surf? This is about the physics of how waves travel….

##### What makes surfable waves? Storms

So, what makes good waves to surf? The easy answer is storms. Do all storms…

##### Wind -offshore and onshore

This lesson is about onshore and offshore wind. Wind is very important in surfing. Wind…

##### Bathymetry of Giant Waves

This lesson is about the bathymetry of giant waves. Some surf waves can be huge…

##### Wind -sunrise and sunset

This is a lesson about wind and sunrise and sunset. Sometimes surfers get up at…

##### What makes surf waves?

So, what turns open ocean waves into surf waves? Surf waves actually start their journey…

##### Bathymetry and Waves

What is bathymetry? It’s the measure of the depth of water in ocean, seas, or…

##### Wave Refraction

This lesson is about wave refraction. Wave refraction is the bending of waves as it…

##### Tides and Surf

This lesson is about how waves change the tidal changes focusing on mid tide waves….

##### Wave Orbitals

This lesson is about the physics of wave orbitals. When I talk about surf waves,…