Edit Game
Year 8 Revision
 Delete

Use commas to add multiple tags

 Private  Unlisted  Public



 Save

Delimiter between question and answer:

Tips:

  • No column headers.
  • Each line maps to a question.
  • If the delimiter is used in a question, the question should be surrounded by double quotes: "My, question","My, answer"
  • The first answer in the multiple choice question must be the correct answer.

 Import questions





 Save   54  Close
Explain why 1 litre of water is heavier than 1 litre of oil.
Water is denser than oil
Why is a solid incompressible?
Because the particles in a solid are very close together
Why is a gas less dense than a solid?
The particles in a gas are closer together
Explain the ideal physical properties of a rover designed to explore volcanoes on Jupiter. (Refer to melting point, density, and strength.)
High melting point, low density, high strength
Name 5 elements!
Many possible answers (see the periodic table)
Name a type of reaction in which the mass of products is greater than the mass of reactants. Explain your choice.
This is not possible. In chemical reactions, the mass of products equals the mass of reactants due to the law of conservation of mass.
Based on the image, in which type of chemical reaction are there fewer reactants than products?
Decomposition
Based on the image, how do we know that rusting is a chemical reaction?
Because iron oxide has a different chemical composition from iron (the atoms are arranged differently).
What must be broken for water to undergo a chemical reaction? Refer to the image.
Covalent bonds between oxygen and hydrogen atoms
Magnesium gives off a very bright white light when it burns in the presence of oxygen. Is this an example of a chemical property or a physical property?
Chemical property
Give two examples of physical changes in which heat is absorbed.
melting; evaporation; boiling
What MUST happen for a chemical reaction to have occurred?
A new substance must have been produced.
Which type of change is usually reversible?
Physical change
Can you name five common signs of a chemical change, other than a new substance being produced?
heat/light produced; solid produced (precipitate); gas produced, causing bubbling or fizzing; odour produced; permanent colour change
Does the image show a physical change or a chemical reaction?
Physical change
Does the image show a physical change or a chemical reaction?
Physical change (change of state)
The image on the left shows ice and the the image in the middle shows liquid water. Based on the image, what is unusual about water compared to most other substances?
In its solid state, water molecules are further apart than in the liquid state. Usually, the opposite is true.
Does the image show a physical change or a chemical reaction?
Chemical reaction
To convert water to pure hydrogen and pure oxygen, what must be broken?
Chemical bonds between atoms
Which of the pictured materials consists of identical molecules? How do you know?
A and D, because they each contain identical particles consisting of multiple atoms chemically bonded together
Which of the pictured materials is a compound? How do you know?
A, because it contains atoms of two different elements joined by chemical bonds
Which of the pictured materials is a mixture? How do you know?
C, because it contains multiple types of particles (and thus contains multiple pure substances)
Which of the pictured materials are elements? How do you know?
B and D, because they each contain only one type of atom
Why do atoms have no overall charge?
The number of protons is equal to the number of electrons.
Why does carbon have the atomic number 6?
Each carbon atom has 6 protons in its nucleus.
Name the subatomic particle labelled 'E' in the image.
Neutron
Name the part labelled 'B' in the image.
Nucleus (atomic nucleus)
Which type of substance contains only one type of atom?
Elements
In which type of substance are atoms of different elements chemically bonded together?
In compounds
In which section of this heating curve is the kinetic energy of particles too low to overcome attractive forces between them?
Section A
In which section(s) of this heating curve is all the added energy being used to break forces of attraction between particles?
Sections B and D
In which section(s) of this heating curve is the kinetic energy of particles increasing?
Sections A, C and E
Can any of these compounds be in the solid state when iodine is a gas? Justify your answer.
Sodium chloride, sodium carbonate and sugar can be in the solid state when iodine is a gas, because they each have a MP that is greater than iodine's BP.
Is any of these compounds a gas at room temperature? Justify your answer.
Methane is a gas at room temperature, because it boils at a temperature below room temperature.
If a gas in a rigid container is heated, what increases?
The pressure inside the container (as the gas particles collide more forcefully with the walls of the container)
Apart from its volume, what increases when a solid expands?
The distance between particles
Are particles moving fastest in the solid state, the liquid state, or the gaseous state?
Gaseous state
For melting to occur, does energy have to be added to a substance or removed from the substance?
Added
For which substance is the heating curve shown? How do you know?
Water, because of its melting point and boiling point
Identify a difference between evaporation and boiling.
Evaporation occurs at all temperatures, and only at the liquid surface, whereas boiling occurs only at the boiling point and throughout the whole liquid.
What causes a solid to melt?
Heating the solid increases the kinetic energy of particles until they have enough kinetic energy to overcome some of the attraction between them.
Which change of state involves a liquid transforming into a gas at the liquid surface?
Evaporation
Which state of matter has a fixed volume but no fixed shape?
Liquid
What causes freezing?
Removing heat decreases the kinetic energy of particles, which allows attractive forces between them to pull them into a rigid structure.
Do liquids expand or contract when cooled? Why?
They contract, because the decrease in kinetic energy of particles allows the attractive forces between them to pull them closer together.
What is happening at the part of the heating curve labelled '2'? Why?
The substance is melting. The temperature is not increasing because the added heat is being used to break attractive forces between particles.
Do solids expand or contract when heated? Why?
They expand because the kinetic energy of the particles is increasing, pushing them farther apart and increasing the space between them.
Which change of state involves a gas becoming a liquid?
Condensation
Which phase change involves a solid changing directly into a gas?
Sublimation
In which state of matter are the attractive forces between particles extremely weak?
Gas
What increases when you heat a gas in a deflated balloon? Why?
The volume of the balloon increases because the particles are moving faster and colliding more forcefully with the sides of the balloon.
In which state of matter are the particles unable to flow?
Solid
How does the kinetic energy of particles differ between solids, liquids and gases?
The kinetic energy of particles is highest in gases and lowest in solids.
What is the type of energy that is associated with an object or particle in motion?
Kinetic energy
Your experience on this site will be improved by allowing cookies.