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WorksheetsCHS Science Revision 8s - Chemicals
Total questions: 30
Worksheet time: 15mins
Is sugar (C12H22O11) an element or a compound?
Element
Compound
Is water an element or a compound?
Element
Compound
Au is the chemical symbol for...
Iron
Titanium
Gold
Flourine
He
Based on this symbol, what can you tell about Helium (He)?
Helium is a compound
Helium is an element
helium is a metal
helium is a mixture
H2O is the formula for water.
How many different elements are in this compound?
1
2
3
4
Carbon (C) is considered an element while Carbon Dioxide (CO2) is considered a compound. That is because carbon dioxide is...
a gas
made of two elements
given off by plants
useful to us
Which of the following is true of all metals?
They react with acids to form hydrogen gas
They are denser than water
They conduct electricity
They're silver in colour.
A combination of substances that are not chemically combined is called a...
mixture
compound
element
This image is a model of...
an element
a compound
a mixture
This image is a model of...
an element
a compound
a mixture.
This image is a model of...
an element
a compound
a mixture
How many molecules are in this picture?
1
2
3
4
Is this image showing an element, a mixture, or a compound?
element
mixture
compound
Does this image best represent an element, a mixture, or a compound?
element
mixture
compound
This image shows a mixture of chemicals. How many compounds are shown in this picture?
1
2
3
4
In the periodic table, metals are found...
on the left-hand side
on the right-hand side
in the middle
along the top.
How many different elements are found in copper sulphate CuSO4?
(Type only in numbers!)
(a)
What is the total number of atoms found in copper sulphate - CuSO4?
(Type only in numbers!)
(a)
The symbol for carbon is?
Cu
Cr
C
Ca
The symbol for sodium is?
NA
S
So
Na
In the periodic table, non-metals are found...
on the left-hand side
on the right-hand side
in the middle
along the top.
A green powder is heated & a gas is given off while it turns to a black solid. This describes
Physical Change
Chemical Change
Change in State
Change in Temperature
Which of the following could indicate that a chemical change took place?
Change in color
Production of Energy
Formation of Gas
All are correct
Which type of change is most often easily reversed?
Chemical
Physical
Both a physical and chemical change.
Neither a physical or chemical change.
Identify what type of change happening in the picture below...
Chemical Change
Physical Change
Endothermic Reaction
Exothermic Reaction
Identify what type of change happening in the picture below...
Chemical Change
Physical Change
Endothermic Reaction
Exothermic Reaction
Which of the following is an example of a physical change?
A glass falling and shattering on the floor.
Baking a birthday cake.
Burning a piece of paper.
Baking soda and vinegar mixing together.
