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G1 Science (Secondary 2) > 6) Matter > Flashcards

6) Matter Flashcards

For revision of Chapter 6 Matter

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1
Q

What are the three states of matter?

A

solid
liquid
gas

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2
Q

Matter has many different physical properties. Name 2 of them.

A
  1. boiling point
  2. melting point
  3. density
  4. solubility
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3
Q

Define melting (the process)

A

A process in which a solid turns into a liquid.

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4
Q

Define boiling (the process)

A

A process in which a liquid turns into a gas.

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5
Q

Define evaporation (the process)

A

A process in which a liquid turns into a gas at any temperature.

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6
Q

Define freezing (the process)

A

A process in which a liquid turns into a solid.

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7
Q

Define condensation (the process)

A

A process in which a gas turns into a liquid.

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8
Q

Which of the following state change processes gains heat?
(boiling, melting, freezing, condensation)

A

boiling and melting

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9
Q

Which of the following state change processes loses heat?
(boiling, melting, freezing, condensation)

A

freezing and condensation

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10
Q

Define density of a substance.

A

The density of a substance is the mass per unit volume in a matter.

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11
Q

What is the unit for density?

A

g/cm3

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12
Q

Explain why the marble sinks in water.

Hint: The marble is ____________ than water, so it sinks.

A

The marble is denser than water, so it sinks.

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13
Q

Explain why the cork floats on water.

Hint: The cork is ____________ than water, so it floats.

A

The cork is less dense than water, so it floats.

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14
Q

How is a mixture formed?

A

A mixture is formed when 2 or more substances are mixed.

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15
Q

Name the two types of mixtures.

A

solution and
suspension

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16
Q

There are 3 separation techniques to separate mixtures. Name the 3 techniques.

A
  1. magnetic separation
  2. filtration
  3. evaporation to dryness
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17
Q

Salt water is formed when salt dissolves in water.
State which substance (salt water, salt, water) is the solute, solvent and solution.

A

salt water (solution)
salt (solute)
water (solvent)

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18
Q

How is a suspension formed?

A

A suspension is formed when a solid does not dissolve in a liquid.

19
Q

How does a solution appear?

A

A solution looks clear.

20
Q

How does a suspension appear?

A

A suspension looks cloudy.

21
Q

What happens to a beam of light shining at a solution?

A

The beam of light passes through a solution.

22
Q

What happens to a beam of light shining at a suspension?

A

The beam of light does not passes through a suspension.

23
Q

Define solubility of a solute.

A

The solubility of a solute is defined as the maximum amount of solute that can dissolve in a given amount of solvent at a fixed temperature.

24
Q

What are the 3 factors that affect the solubility of a solute?

A
  1. type of solute
  2. type of solvent
  3. temperature of solvent
25
Q

Define the rate of dissolving.

A

Rate of dissolving is a measure of how fast a solute can completely dissolve in a solvent.

26
Q

What are the 3 factors that affect the rate of dissolving?

A
  1. temperature of solvent
  2. surface area of solute (aka the size of the solute)
  3. the presence of stirring
27
Q

How does an acid taste like?

A

sour

28
Q

How does an alkali taste like?

A

bitter

29
Q

What is a neutral solution?

A

A neutral solution is neither acidic nor alkaline.

30
Q

What happens to a red litmus paper when it is dipped in acid?

A

The red litmus paper remains red.

31
Q

What happens to a red litmus paper when it is dipped in alkali?

A

The red litmus paper turns blue.

32
Q

What happens to a red litmus paper when it is dipped in a neutral solution?

A

The red litmus paper remains red.

33
Q

What happens to a blue litmus paper when it is dipped in alkali?

A

The blue litmus paper remains blue.

34
Q

What happens to a blue litmus paper when it is dipped in a neutral solution?

A

The blue litmus paper remains blue.

35
Q

What happens to a blue litmus paper when it is dipped in acid?

A

The blue litmus paper turns red.

36
Q

What is the range of a pH scale?

A

0 - 14

37
Q

What is the range of pH for acidic solutions?

A

0-6

38
Q

What is the range of pH for alkaline solutions?

A

8-14

39
Q

What is the pH value of a neutral solution?

A

7

40
Q

Which separation technique is used to separate salt from salt water?
(filtration, evaporation to dryness, magnetic separation)

A

evaporation to dryness

41
Q

Which separation technique is used to separate sand from sand water?
(filtration, evaporation to dryness, magnetic separation)

A

filtration

42
Q

Which separation technique is used to separate iron from iron salt mixture?
(filtration, evaporation to dryness, magnetic separation)

A

magnetic separation

43
Q

What are the names of the parts labelled A and B?

A

A: residue
B: filtrate

G1 Science (Secondary 2) (7 decks)

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