1.
Chemical A: A white, powdery, solid (corn starch)
Chemical B: A yellow colored liquid

2.
Oobleck was white and gooey. It was also a physical change since the powder and liquid combined changed it into a solid/liquid goo.

3.
I think that the oobleck was a solid and liquid, it all just mattered on how much liquid was put in it and also where it was. If it was on the table sitting it would turn hard and dry but when u would hold it in your hand you could see that the top of it looked wet so it was a liquid.

4.
Oobleck helped me see how physical change works and also how it could be 2 states at the same time, having both properties of a solid and liquid.