Topic C: Grade 5 Science
Grade 5 Science
Chemistry Unit Test Name _______________
2020
Choose the best answer from the box below. (5 marks)
1. When sand and iron filings are mixed together, the iron filings can be separated using a _________.
2. _________ does not dissolve in water.
3. A solid substance dissolved in a liquid, can be recovered as a crystal through the ____________ process.
4. A change of colour may occur when a ____________ reaction takes place.
5. Liquids will separate according to their ___________.
Multiple Choice (5 marks)
1. Three states of matter are:
_____ solute, solution, precipitate
_____ oxygen, carbon dioxide, water
_____ solid, liquid and gas
_____ atom, molecules, nucleus
2. Water molecules are attracted to
_____each other
_____ glass
_____ iron filings
_____ magnets
3. Some common household solids are:
_____ borax, baking soda and salt
_____ baking soda, baking powder and cooking oil
_____ lemon juice, vinegar and bleach
4. The process of passing a mixture through paper to separate the substances is called
_____ decanting
_____ distilling
_____filtering
_____ saturating
5. The evaporation process can be used to
_____ recover the salt from a mixture of salt and water
_____ recover the grass from a mixture of grass and rocks
_____ recover the sugar from a mixture of sugar and salt
Fill in the blank (5 marks)
1. Trail mix is an example of two or more __________ mixed together.
2. __________ are used to separate materials that are different sizes.
3. When __________ is mixed with vinegar, carbon dioxide gas is
formed.
4. Water will freeze at ______*C_ and boil at ______*C_.
Match the opposites: (5 marks)
a) to separate _____ liquid
b) reversible _____ irreversible
c) solid _____ to mix
d) acid _____ melting
e) freezing _____ base
True or False? (5 marks)
_____ Making water into ice is an example of reversible change.
_____ Red cabbage juice will turn blue in the presence of an acid.
_____ The expanding balloon was a sign of a chemical reaction.
_____ A liquid takes the shape of its container.
_____ Lemon juice is an example of a base.
Short Answer (5 marks)
1. Explain one example of a sign that a chemical reaction has taken place?
_____________________________________________________________
_____________________________________________________________
2. When we made our liquid tower in class different layers of liquids
formed. Why did this happen?
_____________________________________________________________
_____________________________________________________________
3. What type of separation method did we use when we made our sugar crystals in class?
__________________________________________________________________________________________________________________________
4. Give an example of an irreversible change. (not mentioned on test)
__________________________________________________________________________________________________________________________
5. Give an example of a reversible reaction. (not mentioned on test)
__________________________________________________________________________________________________________________________
Yes or No? ( 5 marks)
_____ Cooking an egg is an example of a reversible change.
_____ Gas molecules spread out to fill all available space.
_____ Materials having iron in them will separate using a magnet.
_____ Cornstarch can be added to water to form a suspension.
_____ Air can be used to separate materials of different weights.
Red or Blue? (5 marks)
1. Red litmus paper dipped in vinegar will be ___________.
2. Blue litmus paper dipped in a basking soda solution will be ________.
3. Red litmus paper dipped in bleach will be ___________.
4. Blue litmus paper dipped in lemon juice will be _________.
5. Red litmus paper dipped in a soap solution will be __________.
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talc magnet density chemical evaporation crystal litmus
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