Deanne and Bo conduct an experiment at school. They put vinegar into a dish, and then they add baking soda to it. Lots of bubbles form as they stir the two substances together. After the bubbling stops, they notice that they no longer smell the distinctive odor of vinegar. Their teacher explains that the atoms making the vinegar and the atoms making the baking soda were recombined to form water, carbon dioxide, and another compound called sodium acetate.
a. Deanne and Bo determine that a reaction take place. When a reaction takes place, atoms must
b. Which of the following pieces of evidence helped Deanne and Bo answer question a?(2 points)
evidence that was useful to Deanne and Bo evidence that was not observed or was not useful
A solid dissolved in a liquid.
evidence that was useful to Deanne and Bo – A solid dissolved in a liquid.
evidence that was not observed or was not useful – A solid dissolved in a liquid.
A new gas was formed.
evidence that was useful to Deanne and Bo – A new gas was formed.
evidence that was not observed or was not useful – A new gas was formed.
An odor changed.
evidence that was useful to Deanne and Bo – An odor changed.
evidence that was not observed or was not useful – An odor changed.
They saw a new color.
evidence that was useful to Deanne and Bo – They saw a new color.
evidence that was not observed or was not useful – They saw a new color.
.
a. Deanne and Bo determine that a reaction takes place. When a reaction takes place, atoms must rearrange or recombine to form new substances.
b. The evidence that was useful to Deanne and Bo in determining that a reaction took place includes:
- A new gas was formed.
- An odor changed.
The evidence that was not observed or not useful includes:
- A solid dissolved in a liquid.
- They saw a new color.
a. Deanne and Bo determine that a reaction must take place. When a reaction takes place, atoms must rearrange.
b. The evidence that was useful to Deanne and Bo in answering question a was that they observed a new gas formed and they noticed a change in odor.
The evidence that was not observed or was not useful in answering question a was that a solid dissolved in a liquid and they saw a new color.