2 G6 Unit 2 Review

Name: Class:
Grade 6 Unit 2 review
2.1.1. I can differentiate between elements, compounds, homogeneous mixtures, and heterogeneous mixtures.
Q1. Identify whether it is an elements, compounds, molecule, homogeneous mixture, or heterogeneous mixtures
based on the description.
1. Two or more chemicals physically combined that are perfectly mixed- __________________________
2. Two or more chemicals physically combined that with separate layers - __________________________
3. Every atom has the same number of protons - __________________________
4. Two or more different atoms chemically bonded - __________________________
5. Two or more atoms chemically bonded - __________________________
2.1.2 I can recognise the difference between elements, molecules, compounds, homogeneous mixture and
heterogeneous mixtures based on description, particulate pictures, and chemical formulas.
Q2.
______________________ _________________ _________________ _________________

Q3. Choose the correct option for the following formulas:
1. CaCO3 – Molecule or single atom 2. HCl – homogeneous or compound
3. NaCl and SiO2 - Compound or heterogeneous 4. NaCl in H2O – Heterogeneous or homogeneous
5. O2 – Element or compound 6. Ar - Molecule or single atom
2.1.3 – I can recognize solids as having definite volume and definite shape, liquids as having definite volume but
no definite shape, and gases as having neither definite shape nor volume; they can be compressed.
Volume Particles Shape Particles
touch? move?
Solid Definite Yes Definite No - vibrate
Liquid Definite Yes Indefinite Yes – but

must stay
touching
Gas Indefinite No Indefinite Move freely
Q4. Which state of matter has a definite volume but no definite shape?
2.1.4 I can recognize solids as having particles that are close together and only vibrating in place, liquids as
having particles that are close together but can slide past one another, and gases as having particles that are
constantly moving and can either be close or far apart.
Whether a state of matter has a definite volume depends on whether the particles touch. If the particles are
touching they cannot be compressed (squeezed closer together).
Whether a state of matter has a definite shape depends on whether the particles move. If the particles can move
then the shape can change.
Q5. Draw particle diagrams for solid, liquids and gases.
Q6. If the particles in a state of matter have a cannot move which is true:
a. It has a definite shape b. It has a indefinite shape
c. It has a definite volume d. It has a indefinite volume
2.1.5 I can name the following changes in state of matter: melting, freezing, boiling/evaporation,
condensation, sublimation, and deposition.
Q7. Name the following changes:
Solid Liquid Gas
2.2.1 I know that physical changes do not involve a change in the substance's identity while chemical changes
do change the identity of the substance. REMEMBER! Dissolving and state changes are physical, cooking is
chemical.
Q8. Identify if the following changes are physical or chemical
1. Frying an egg __________________ 2. Dissolving salt in water _______________
3. Burning oil ______________________ 4. Melting an ice cube __________________
2.2.2 I can remember properties as either Physical: melting/boiling points, volume, mass, weight, length, color,
odor, luster, density, hardness, conductivity, malleability, ductility; or Chemical: reactivity and flammability.
Q9. Which of the following is a physical property:
a. Reactivity b. Flammability c. Burning d. Color
2.3.1 The student will be able to define density as the amount of matter in a given volume. D = m/V
Q10. Identify the denser material:
Q11. I can calculate density given mass and volume. USING SIGNIFICANT FIGURES AN APPROPRIATE UNITS
Calculate the density of a substance with a mass 10.0 kg and a volume of 50 ml ____________________
Calculate the mass of a substance with a density of 5.0 g / ml and a volume of 50 ml ____________________
Calculate the volume of a substance with a mass 10.0 kg and a density of 5.0 g / ml ____________________
2.3.2 I can use the density of water (1 g/ml) in calculations.
Q12. How much would 53 cm3 of water mass _____________________
2.3.3 The student will be able to compare the density of a substance that of water and determine if the
substance will sink or float.
Q13. Would a substance with a density of 0.5 g / ml float or sink? ________________
2.5.1 I can read measurements from a balance and measuring cylinder to correct Sig Figs
_______________g ___________cm3
2.5.2 I know that a solution is also called a homogeneous mixture. I also know that a solution is made of a
solid called a solute dissolved in a liquid called a solvent.
Q15. Name the three parts of a solution:

Solid: ______________________________
Liquid: _____________________________
Solid dissolved in liquid: __________________________

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Name: Class:

Grade 6 Unit 2 review

______________ _ _ _________

Liquid Definite Yes Indefinite Yes – but

Solid Liquid Gas

Q15. Name the three parts of a solution:

Solid dissolved in liquid: __________________________

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