Q-Science-Gr7-SQSA1-CBT (2020-21) Question: 1-1
Francesca creates a model that shows the movement of the tectonic plates of the Earth's surface. If she wants to use the model to understand the concept of how a mountain is formed how does that mos
help her?
It shows all of the plates in the correct layout.
It explains in detail how mountains are formed
It displays details that cannot be seen in a drawing
It visualizes a process that takes millions of years,
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Explanation:

I need the answer too RIGHT NOW

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2