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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