WorksheetsUnit 1 review
Total questions: 40
Worksheet time: 30mins
Fe
Lead
Iron
Gold
Lead
A one or two letter abbreviation used to represent an element is called a(n) ________
chemical symbol
chemical formula
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
How many Capital or Uppercase letters can one element have?
5
1
3
2
which of the following is NOT evidence of a chemical reaction?
bubbling and fizzing
a precipitate forming
a phase change from a solid to a liquid
temperature change
Tearing paper into small pieces is a -
chemical change
chemical reaction
nuclear reaction
physical change
Your bicycle rust when left outside. This is evidence of a -
chemical change
physical change
nuclear reaction
physical reaction
How many elements are present in this compound?
NaHCO3
1
2
3
4
How many elements are in this compound?
B6Cl2OH
4
3
10
11
Element or Compound?
F2
Element
Compound
Element or compound?
NH3
Element
Compound
Element or Compound?
CO2
Element
Compound
Element or Compound?
H2
Element
Compound
How many different elements are in a compound with the formula H2CrO4?
1
2
3
4
Which of these is a physical change?
ice melting
iron rusting
wood burning
A liquid evaporating is a:
chemical change
physical change
Which is s sign of a chemical change?
a loud noise
bubbles
sugar dissolving in water
Which is an example of a chemical change?
Which of the following 2 are chemical reactions? (chose two answers)
sugar dissolving in water
water turning into steam
burning wood
mixing baking soda and vinegar
tearing paper
Is melting butter for popcorn a chemical or physical change?
chemical
physical
The melting of wax is an example of a
chemical change
physical change
The burning of a cantle wick is an example of a
chemical change
physical change
A change that does not result in a new substance
chemical property
chemical change
physical propert
physical change
Bubbles form when water boils. Is this evidence of chemical change?
Yes, because water is changing.
Yes, because the water is reacting.
No, because the vapor is still water.
No, because water doesn't react with anything.
Wood is chopped into small pieces. Then, it is burned to cook food. This is an example of a ____ change followed by a ____ change.
chemical, physical
physical, chemical
physical, physical
chemical, chemical
Why is baking bread an example of a chemical change?
You mixed the ingredients together
You baked it and the bread changed color
It is not a chemical change
When burning a candle how do you know a chemical change has taken place?
The wick give off light as it burns.
The wax is running down the side of the candle.
The candle is getting shorter.
The wax changes from a solid to a liquid.
