Exploda bag

Inquiry experiment  

Aim/Purpose : 

To see what happens when baking soda and vinegar mix/combine 

To see the reaction that occurs when these two substances are mixed

  

Prediction - What do we think is going to happen:

We think it will explode/ It’s going to blow up

The ziplock bag will pop open and the liquid will spill out

It could fizz up 

The bag might fill up with air 

Fizz up like soda when shaken

The air pressure created inside the bag will cause the seal on the bag to pop open

Steps:     

1.  Open up a paper towel on a flat surface
2. Put 4 levelled teaspoons of baking soda in the centre of the paper towel
3. Wrap up the baking soda in the paper towel like a package - Keep the baking soda concentrated in the middle of the paper towel
4. Tape down your package of baking soda with a piece of masking tape so that everything stays in place
5. Open the vinegar and pour it into a cup - until the cup is half full
6. Then open a zip lock bag and pour the vinegar into it
7. Hold the package inside the zip lock bag, making sure it doesn’t yet make contact with the vinegar - then zip up the bag - making sure that it is completely closed
8. Let the package of baking soda drop into the vinegar and shake the bag up a little so that they start to mix
9. Observe what happens

https://www.youtube.com/watch?v=FlmsiPxEuK0

Materials/equipment:

• Baking Soda  (4 x tablespoons) 
• Vinegar (half a cup)
• Ziplock sandwich bags 
• Plastic spoon
• Paper towel 
• Masking tape

Roles within the group:

1. Presenter - conducts the experiment 
2. Assistant - collects all the materials 
3. Videographer - takes a video of the experiment 
4. Recorder - Record the result

After students have prepared they can present the experiment in front of the class who will be the audience. The videographer can record the experiment and the recording can be shared at a later stage.  

The Result - What did we see happen?

When we dropped the baking soda into the vinegar and that caused a gas eruption. The bag fizzed up and up and until there was no air the bag will explode.  

Variables - How could we change the variables?

Predict what might happen if we change the variables 

Experiment - Were our predictions accurate?

Put 5 or more teaspoons of baking soda into the package - Bigger explosion/more powerful 

If there is too much baking soda and not enough vinegar, it may not work

Put more vinegar  - Bigger explosion/not pop  

Way less baking soda and wrapped in more paper towels - nothing - it would take a longer time to see a reaction 

Baking soda - With no package surrounding it - The reaction would happen instantly and uncontrollably 

The Science - Why did it happen?  Here are some websites to look at…. You may be able to find other websites too!

When vinegar and baking soda are first mixed together, hydrogen ions in the vinegar react with the sodium and bicarbonate ions in the baking soda making a chemical reaction and the air bursts through 

https://littlebinsforlittlehands.com/balloon-baking-soda-vinegar-experiment-kids/

https://www.science-sparks.com/amazing-baking-soda-experiments/

https://www.wonderopolis.org/wonder/what-happens-when-you-mix-vinegar-and-baking-soda

https://carrotsareorange.com/baking-soda-vinegar-reaction-experiment/

Kotare kingfishers

Saveer:  Day in the life of a Kingfisher (Kotare)

Hi, my name is Halcon the Kingfisher also known as the Kotare. I do get aggressive when it comes to family and food, so if I were you I would not mess with me or my kind. Anyways, I was just about to go over to the lake for some dinner because I couldn’t find anywhere else which gives free food. 

I was just waiting for a fish to show itself. I was just about to swoop in when I mistakenly got into the sight of a fox. I flew back up all the way back to my nest. Fortunately, I had lost the fox but unfortunately, I had to sleep with an empty stomach. The way I adapted was that I had to compensate for the water's refraction and reflection as I search for prey underwater.

Almost all my species are brightly coloured just like me! I have orange legs, blue and green wings and upperparts and my rump and tail are a bright blue colour. If you haven’t realised I will have to travel to the same river I was at because I need to eat 60% of my body weight a day. Sometimes I wish there was a gym for birds so I can burn some of it out, but I need my energy.

(The next morning) OMG! I couldn’t sleep all night because I only got to eat 20% of my body weight instead of 60%. I hope that stupid fox is still asleep so I can eat some breakfast. I then zoomed over to the lake at my top speed of 40 km per hour and took two fish, just in case I can’t find any lunch or the fox woke up, I could eat the second fish. But hopefully, the fox found its own predators and ran off. Anyways that’s all I am going to be doing my entire life unless I find someone so I can have kids but other than that I’m going to be doing this for a while, see you next time unless I get eaten by a fox or one of my other predators. 

(New Paragraph) Just a few more things I want t tell you, let me know if you meet one of my cousins. You might not know that they are related to me though, because there are 120 of my species. Anyways, I’m hungry again so I’ll just zooooooom over to the lake and catch a fish if I am lucky. One more thing before I go, you might not see me in a long time because I have to go over to my brother’s house which is in the Amazon rainforest, he is a different species from me though because he was adopted. He is a Crested kingfisher and I love laughing at his hairstyle. Cya around.

My Brother                              Me!

 

_____________________________________________

Rishi: Information about the Kotare kingfisher

What is a Kotare kingfisher?

The Kotare kingfisher is part of the Halcyonidae family. The Kotare (kingfisher) is a medium-sized woodland kingfisher that lives in mangroves, woodlands, forests,  river valleys, Australia, New Zealand, and other parts of the western Pacific. 

What do Kotare Kingfishers look like

All kingfishers have large heads, long, sharp, pointed bills, short legs and fat tails. 

The Kotare Kingfisher has a blue-greenish back with yellow under the wings. Kingfishers have short, orange coloured legs. Kingfishers are very vividly coloured. The colour of their wings is a blue/green colour and their upperparts and tails are bright blue coloured. Their underparts are bright orange and they have a small, white bib underneath their beaks, on their throats.

What do Kotare kingfisher eat

Kotare eats small crabs, fish and a variety of tadpoles. You can find Kotare in inland and coastal freshwater habitats.

The Kotare Kingfisher eats 60% of its body weight each day! The Kotare kingfisher can travel up to 40km/h and has the life span of 6-10 years. There are over 100 species of Kingfishers.    The design of a kingfisher’s beak is aerodynamically efficient, allowing it to dive from where it is, towards its prey, with maximum speed and minimum splash. In fact, the beak design is so clever that the front of many Japanese bullet trains is modelled to mimic it.

  Conclusion

Overall the bird is a wonderful bird, bright-coloured and amazing. Thankfully the Kotare kingfisher is not endangered and hopefully, it won’t. Did you know that a Kotare kingfisher’s real name is a Sacred Kingfisher? 

  

Killer whale

Tropical and Temperate rain forest