WorksheetsT11 Lesson 1 and Lesson 2
Total questions: 16
Worksheet time: 12mins
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
Why are chemical equations always balanced? Select ALL that apply.
Matter cannot be created.
Matter cannot be destroyed.
Matter can only be rearranged/conserved.
Matter doesn't matter.
The smallest particle of an element; made of electrons, protons, and neutrons
Atoms
Elements
Molecules
Products
This change is a
chemical reaction
physical change
musical change
all answers are correct
This image shows a
chemical reaction
physical change
musical change
all of these answers are correct
The reactants in the image above are:
CH4 and 2 O2
2 H2O and CO2
All of these are reactants
All of these are products
The products in the image above are:
CH4 and 2 O2
2 H2O and CO2
All of these are reactants
All of these are products
