Formative Test 1
Matter
Direction: Answer the questions carefully.
1. Which process turns solid ice into liquid water?
Answer: Melting
2. Mostafa changed water from a liquid to a solid. What did he do to the water?
Answer: he froze the water
3. The three states of matter are solid, liquid and gas. Which process changes water vapor into
liquid water?
Answer: condensation
4. Water changes states when energy is added or taken away. What happens to liquid water when
energy is added?
Answer: it evaporates into gas
5. Which states of matter have particles that can move against each other?
Answer: liquid and gas
6. Which state of matter takes the shape of its container?
Answer: liquid
7. Which state of matter has a definite shape?
Answer: solid
Formative Test 2
Elements or Compound
Direction: Choose the correct letter. Answer the questions carefully.
1. Elements are pure substances made of one kind of atom, represented by a chemical symbol. Which example best
represents the following statement?
A. NaCl
B. H2O
C.O
D. CO
2. A compound is a pure substance with two or more different atoms chemically combined. Which example best
represents the above statement?
A. Co
B. CO
C.03
D. Helium
3. Which symbol correctly represents Gold as a pure substance?
A. Ag
B. Au
C. Ge
D. AU
4. Which example is not related to a pure substance with two or more different kinds of atoms?
I - 2CO2
II - H2O
III - 4CH4 (methane gas)
IV- 2O2 (oxygen gas)
A.I, IV
B. II only
C. I, III
D. IV
5. How is substance B different from Substance A?
A. H2O
B. H2O2
A. Substance A has more total atoms.
B. Substance B has one more atom of oxygen than substance A.
C. None of the above is correct.
D. B has different elements
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Formative Test 3
Appearance of Mixtures
Direction: Choose the correct letter. Answer the questions carefully.
1. Mixtures that are uniform in composition
A. mixture
B. homogeneous mixture
C. substance
D. heterogeneous mixture
2. Mixtures that are not uniform in composition
A. Substance
B. Homogeneous Mixture
C. Heterogeneous Mixture
D. Mixtures
3.Cookies and cream ice cream would be classified as
A.A compound
B. An element
C. A homogenous mixture
D. heterogenous mixture
4.Two substances physically combined and that appears the same throughout is classified as
A. A homogeneous mixture
B. A compound
C. A heterogeneous mixture
D. An element
5.Two elements chemically combined defines
A. A homogeneous mixture
B. A compound
C. An element
D. A heterogeneous mixture
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Formative Test 4
Mixture
Direction: Choose the correct letter. Answer the questions carefully.
1.Which of the following is NOT a property of a mixture?
a. The components can be easily separated
E. The original properties of the combined substances are changed
F. The proportion of the components is variable
G. Two or more substances are combined
H. All of the Above
Correct Answer. (b)
2. Which of the following is an example of a homogeneous mixture?
A. Saltwater
B. Blood
C. Metal alloys
D. Air
E. All of the Above
Correct Answer. (e)
3. In what type of mixture are the substances evenly distributed throughout the mixture?
A. Homogeneous
B. Heterogeneous
C. All types of mixtures
D. No types of mixtures
Correct Answer. (a)
4. What type of mixture is steel?
A. Alloy
B. Suspension
C. Solution
D. Colloid
E. Heterogeneous
Correct Answer. (a)
5.
Give an example for each of the following:
a. Solid-liquid homogeneous mixture
b. Gas-gas homogeneous mixture
c. Liquid-liquid heterogeneous mixture
Answer.
1. salt in water
2. Air
3. Water and oil
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Formative Test 5
Solutions
1. What best describes a homogeneous solution?
A) A mixture with visibly distinct components.
B) A mixture with evenly distributed components that look the same throughout.
C) A mixture that separates into layers over time.
D) A mixture where the components are chemically combined.
Answer: B) A mixture with evenly distributed components that look the same throughout.
2. Which of the following is an example of a homogeneous solution?
A) A glass of milk with visible lumps.
B) A bowl of cereal with milk.
C) A jar of mixed nuts.
D) A bowl of fruit salad.
Answer: B) A bowl of cereal with milk.
3. What is a common use of a sugar-water solution?
A) Cleaning surfaces
B) Making bubbles
C) Quenching thirst
D) Starting a fire
Answer: C) Quenching thirst
4. Which of the following is NOT a use of a homogeneous solution?
A) Taking medicine
B) Making lemonade
C) Separating recyclables
D) Watering plants
Answer: C) Separating recyclables
5. What is the primary reason for using saltwater solutions to de-ice roads in winter?
A) To make the roads look cleaner.
B) To increase friction for better tire traction.
C) To melt ice and snow by lowering their freezing point.
D) To make the roads taste salty.
Answer: C) To melt ice and snow by lowering their freezing point.
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Formative Test 6
Suspensions
1. What is a suspension in science?
A) A mixture where substances are evenly distributed.
B) A mixture where substances settle at the bottom over time.
C) A mixture where substances dissolve completely.
D) A mixture where substances combine to form new substances.
Answer: B) A mixture where substances settle at the bottom over time.
2. Which of the following is an example of a suspension?
A) Sugar dissolved in water
B) Salt dissolved in water
C) Sand mixed with water
D) Lemon juice mixed with sugar
Answer:C) Sand mixed with water
3. What is the main characteristic of a suspension?
A) Even distribution of particles
B) Complete dissolution of particles
C) Rapid settling of particles
D) Formation of new substances
Answer:C) Rapid settling of particles
4. If you leave a suspension undisturbed for some time, what will happen to the solid particles?
A) They will dissolve completely.
B) They will evenly distribute throughout the mixture.
C) They will settle at the bottom.
D) They will evaporate.
Answer:C) They will settle at the bottom.
5. Which of the following mixtures is NOT a suspension?
A) A glass of orange juice with pulp
B) A bowl of clear chicken broth
C) A muddy puddle
D) A cup of hot chocolate with dissolved cocoa
Answer: B) A bowl of clear chicken broth
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Formative Test 7
Colloids
1. What is a colloid in science?
A) A mixture where substances settle at the bottom over time.
B) A mixture where substances dissolve completely.
C) A mixture where substances combine to form new substances.
D) A mixture with particles that are evenly dispersed but not dissolved.
Answer:D) A mixture with particles that are evenly dispersed but not dissolved.
2. Which of the following is an example of a colloid?
A) Saltwater
B) Sugar dissolved in water
C) Milk
D) Lemon juice mixed with sugar
Answer:C) Milk
3. What is the main characteristic of a colloid?
A) Rapid settling of particles
B) Even distribution of particles
C) Complete dissolution of particles
D) Formation of new substances
Answer: B) Even distribution of particles
4. In a colloid, how are the particles dispersed throughout the mixture?
A) They settle at the bottom.
B) They dissolve completely.
C) They are evenly distributed but not dissolved.
D) They form new substances.
Answer: C) They are evenly distributed but not dissolved.
5. Which of the following mixtures is NOT a colloid?
A) Whipped cream
B) Orange juice with pulp
C) A cup of tea with dissolved sugar
D) Fog
Answer: C) A cup of tea with dissolved sugar
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Formative Test 8
Colloids: Preparing Useful Colloids and Their Importance
1. Which of the following mixtures is an example of a colloid?
A) Sugar dissolved in water
B) Saltwater
C) Milk
D) Lemon juice mixed with sugar
Answer:C) Milk
2. What is a colloid?
A) A mixture with particles that settle at the bottom.
B) A mixture where substances dissolve completely.
C) A substance that forms new compounds when mixed.
D) A mixture with evenly dispersed particles that don't settle.
Answer:D) A mixture with evenly dispersed particles that don't settle.
3. What is an example of a useful colloid in everyday life?
A) Sugar dissolved in tea
B) Whipped cream
C) Saltwater
D) Clear chicken broth
Answer: B) Whipped cream
4. Why are colloids important in various applications?
A) Because they always settle quickly.
B) Because they are easy to separate into their components.
C) Because they have unique properties that make them useful in a wide range of products and processes.
D) Because they are formed by chemical reactions.
Answer: C) Because they have unique properties that make them useful in a wide range of products and
processes.
5. What is one common application of colloids in the food industry?
A) Making pure water
B) Storing electricity
C) Extending the shelf life of food products
D) Separating mixtures
Answer:C) Extending the shelf life of food products
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