Unit 3 – Mixtures and Solutions Review Assignment
Grade 7 Science
Name:______________
Date:____________
Class: ______
Part A. Fill in the blanks: Use the word bank provided to fill in the blanks
Alloy
Dissolve
Matter
Solute
Solvent
Concentration
Insoluble
Soluble
Solubility
Solution
Concentrated solution
Heterogeneous mixture
Homogenous mixture
Mechanical mixture
Rate of dissolving
Dilute solution
Pure substance
Qualitative
Quantitative
separation
1. A solution that contains a small amount of solute for a certain
quantity of solvent.
2. A combination of two or more different types of matter in a
mixture that retain their own properties and can be detected quite
easily.
3. Anything that takes up space, has mass and is made up of
particles.
4. A material that is composed of only one type of particle.
5. A homogenous mixture of two or more substances; the
composition of the mixture is the same throughout the sample.
6. Another word for heterogeneous mixture.
1. Dilute solution
7. A combination of two or more different types of matter that
appear to be the same throughout the mixture and have the same
properties.
8. A substance that can be dissolved in a solvent to form a
solution.
9. A solution that is made from two or more metals
7. Homogenous mixture
2. Heterogeneous mixture
3. Matter
4. Pure substance
5. Solution
6. Mechanical mixture
8. Solute
9. Alloy
10. Soluble
10. Able to dissolve in a particular solvent
11.
12. A description that uses numbers.
11.
12. Quantitative
13. A substance into which a solute dissolves, to form a solution.
14. A solution that has a large mass of dissolved solute for a
certain quantity of solvent.
15. Unable to dissolve in a particular solvent
13. Solvent
14. Concentrated solution
15. Insoluble
16. A description that uses only words.
16. Qualitative
17. The quantity of solute that is dissolved in a certain quantity of
solvent.
18.
17. Concentration
18.
19. mechanical mixtures
19. When separating_____________________, we take
advantage of the physical properties of the particles.
20. When separating _____________________, we take
advantage of the boiling and solubility properties of the particles.
Often involves a change in state.
21. The process of __________________ allows you to separate
a single ________________ (sugar) from a single
_____________________ (water) from a ________________
(homogeneous/heterogeneous) mixture.
20. Solutions
21. separation
1. Give two examples of each of the following:
Pure Substance--------- 24 karat gold
Solution---------windex
Mechanical----pizza
Mixture
oxygen
stainless steel
salsa
2. Determine whether each of the following descriptions are qualitative or
quantitative.
1. The water became warmer.
2. The water’s temperature increased by 5°C.
3. The liquid boiled in 5 min.
Qualitative
Quantitative
Quantitative
Solute
Solvent
Homogenous mixture
Unit 3 – Mixtures and Solutions Review Assignment
Grade 7 Science
Name:______________
Date:____________
Class: ______
3. Identify the solute and the solvent in each of the following solutions
(a) Instant Coffee
Solute = coffee grounds
Solvent = water
(b) Brass
Solute = zinc
Solvent = copper
(c) Vinegar
Solute = acetic acid
Solvent = water
(d) Air
Solute = oxygen, carbon dioxide
Solvent = nitrogen
(e) Koolaid Drink
Solute = koolaid crystals
Solvent = water
4. When you first open a bottle of pop, the liquid is filled with tiny bubbles.
(a) Is the pop homogenous or heterogeneous?
Explain your answer. (2 marks)
The pop is heterogeneous because you can see
more than one type of particle.
(b) If you let the pop sit for a day, what happens? Is
the liquid homogeneous or heterogeneous now?
Explain your reasoning. (2 marks)
The pop is homogeneous because you can see only one
type of particle. Due to the lack of pressure the carbon
dioxide escapes the liquid leaving it as a solution.
5. Suppose that your teacher gives you a liquid mixture. You cannot see any small pieces of
different matter in the mixture. When you pass the mixture through a filter, nothing is left
on the filter paper.
(a) Is the mixture a solution or a heterogeneous
mixture? Explain your answer. (2 marks)
(b) What else can you do to show that it is a solution
or heterogeneous mixture? (2 mark)
The mixture is a solution because there is nothing left on
If you place the liquid under a microscope and you see
the filter. If there was anything left on the filter than you
noting OR shine a light beam through the liquid mixture
know it was made of more than one part ---heterogeneous.
than you know it is homogeneous.
6. What are the 3 separation methods used to
separate heterogeneous mixtures?
7. What are the 3 separation methods used to
separate homogeneous mixtures?
1 magnetism
2. floating
3. filtration
1. evaporation
2. distillation
3. paper chromotagraphy
8. Place the correct term
on the blanks to the left of
the diagram.
1. Vaporization
- residue
- Condensation
2 cool water flowing out
_______________________
- cool water flowing in
- distillate
- Vaporization
- cool water flowing out
3 Condensation
_______________________
4 distillate
_______________________
5 cool water flowing in
_______________________
6 residue
_______________________