T11 Lesson 1 and Lesson 2

You know that a chemical reaction is occurring here because you see __________________ . (Pick 3)

• purple color

• smoke

• ice formation

• fire

• a yellow precipitate

In this chemical reaction, what was the first evidence that you saw?

• Production of fire

• Production of light

• Production of purple smoke

• Production of white powder

The result of the experiment between Iodine and Aluminum was the production of __________________.

• clear liquid.

• a white powder.

• yellow precipitate.

• bubbles.

When zinc reacted with hydrochloric acid, what was the result of this reaction?

• a white powder

• a blue liquid

• a brown precipitate

• a gas

Reactants are the chemicals that are present at the beginning of an experiment. Reactants react together to make the product.

We can know that a chemical reaction is occurring when we see ______.

• that the product looks just like the reactants.

• nothing new.

• that the product looks different from the reactants.

Which of the following is evidence of a chemical reaction?

• Tearing paper.

• Change in color.

• Production of a gas.

• Change in temperature.

• Production of a precipitate.

How many Carbons are present on the reactant side?

• 1

• 2

• 3

• 4

A chemical change is different than a physical change because in a chemical change

• chemicals are used

• molecules do not physically touch

• a new substance is formed and in a physical no new substance is formed

• the change can be seen but in a physical change it cannot

Which of the following 2 are chemical reactions?

• sugar dissolving in water

• water turning into steam

• burning wood

• mixing baking soda and vinegar

• tearing paper

How many Hydrogens are on the product side of this chemical equation?

• 1

• 2

• 3

• 4