this photo right underneath the sentences has two people standing up. As you can see there is a container with some liquid that can turned yellow when this girl blew air into a tube full of carbon dioxide.
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No comments:
Post a Comment
Please structure your comments as follows:
Positive - Something done well
Thoughtful - A sentence to let us know you actually read/watched or listened to what they had to say
Helpful - Give some ideas for next time or ask a question you want to know more about