What is the state of water at room temperature (about 20°C)?
Heating and cooling
Multiple choice
Year 8
1
No diagram
Which of these is not a characteristic of a solid state substance?
Heating and cooling
Multiple choice
Year 8
1
No diagram
Water will melt at __________ ℃?
Heating and cooling
Short answer
Year 8
1
No diagram
In what state does water evaporate ?
Heating and cooling
Multiple choice
Year 8
1
No diagram
What happens to the volume of a substance when it condenses?
Heating and cooling
Multiple choice
Year 8
1
No diagram
How does the energy of particles compare between a block of ice at -10°C and a glass of water at 20°C?
Heating and cooling
Multiple choice
Year 8
1
No diagram
What type of process is boiling?
Heating and cooling
Multiple choice
Year 8
1
No diagram
When energy is transferred out from a substance to its surroundings, this process is termed...
Heating and cooling
Short answer
Year 8
1
No diagram
Which thermometer shows the temperature at which water is in the liquid state?
Heating and cooling
Multiple choice
Year 8
1
Diagram
Evaporation is an endothermic process because energy is transferred from the surroundings into the substance.
Heating and cooling
Multiple choice
Year 8
1
No diagram
Match the statements below to what is happening in terms of energy, particle movement and particle arrangement as a substance is heated over time.
Heating and cooling
Matching
Year 8
5
Diagram
Starting in the liquid state, if a substance's particles increase in energy while its temperature remains constant, what change is happening? Give a one-word answer.
Heating and cooling
Short answer
Year 8
1
No diagram
Which of the following is the most appropriate way to show the change in temperature over time?
Cooling curve: practical
Multiple choice
Year 8
1
Diagram
The term used to describe the energy transfer from an object to its surroundings as it cools is...
Cooling curve: practical
Short answer
Year 8
1
No diagram
True or false? In the gas state, particles have enough energy to move freely and are not held in fixed positions.
Cooling curve: practical
Short answer
Year 8
1
No diagram
What happens to the particles of a substance when it is heated and reaches its boiling point?
Cooling curve: practical
Multiple choice
Year 8
1
No diagram
The temperature at which a substance changes from solid to liquid is known as its...
Cooling curve: practical
Short answer
Year 8
1
No diagram
Match the state of matter to the description about forces of attraction.
Cooling curve: practical
Matching
Year 8
3
No diagram
On a heating curve, what does a plateau indicate?
Cooling curve: practical
Multiple choice
Year 8
1
Diagram
The point on a cooling curve where a liquid starts to solidify is called the __________ point.
Cooling curve: practical
Short answer
Year 8
1
No diagram
How does energy transfer during the cooling of a substance?
Cooling curve: practical
Multiple choice
Year 8
1
No diagram
Which state changes are shown in this heating curve?
Cooling curve: practical
Multiple choice
Year 8
1
Diagram
At what temperature (℃) does this substance begin to melt? (give only the number, not the unit)
Cooling curve: practical
Short answer
Year 8
1
Diagram
Why does a substance's temperature not change during a phase transition, despite continued heating?
Cooling curve: practical
Multiple choice
Year 8
1
No diagram
Match the following terms to their definitions.
Exothermic and endothermic chemical reactions
Matching
Year 8
4
No diagram
True or false? A change of state indicates that a chemical reaction has taken place.
Exothermic and endothermic chemical reactions
Multiple choice
Year 8
1
No diagram
Which of the following are examples of chemical reactions?
Exothermic and endothermic chemical reactions
Multiple choice
Year 8
2
No diagram
Hydrogen gas and magnesium chloride are formed when magnesium reacts with hydrochloric acid.
Which of the following represents the chemical equation for the reaction?
Exothermic and endothermic chemical reactions
Multiple choice
Year 8
1
No diagram
Burning is an example of ...
Select two correct answers.
Exothermic and endothermic chemical reactions
Multiple choice
Year 8
2
No diagram
Calculate the mass of carbon dioxide formed when 13.5 g of calcium carbonate reacts to form 7.6 g of calcium oxide.
calcium carbonate → calcium oxide + carbon dioxide
Exothermic and endothermic chemical reactions
Short answer
Year 8
1
No diagram
Match the following terms to their definitions.
Exothermic and endothermic chemical reactions
Matching
Year 8
3
No diagram
Endothermic reactions cause ...
Exothermic and endothermic chemical reactions
Multiple choice
Year 8
1
No diagram
Which of the following are reactions that are usually exothermic?
Exothermic and endothermic chemical reactions
Multiple choice
Year 8
2
No diagram
The method for finding the lowest temperature of a reaction has been mixed up.
Starting with measuring the volume of solution, sort the following steps into the correct order.
Exothermic and endothermic chemical reactions
Ordering
Year 8
1
No diagram
A pupil monitored the temperature of a reaction. The start temperature was 20°C and the end temperature 15°C.
Which of the following statements about the reaction are correct?
Exothermic and endothermic chemical reactions
Multiple choice
Year 8
2
No diagram
True or false? After an exothermic reaction, the products of the reaction contain more energy than the reactants.
Exothermic and endothermic chemical reactions
Multiple choice
Year 8
1
No diagram
What is a sign that a chemical reaction is endothermic?
Comparing fuels
Multiple choice
Year 8
1
No diagram
Why is it important to only change one independent variable at a time in an experiment?
Comparing fuels
Multiple choice
Year 8
1
No diagram
What is the main reason for repeating an experiment several times?
Comparing fuels
Multiple choice
Year 8
1
No diagram
In an experiment to determine how temperature affects the solubility of a salt in water, what is the dependent variable?
Comparing fuels
Multiple choice
Year 8
1
No diagram
Hydrochloric acid and magnesium react to produce hydrogen gas. Identify the variable for an investigation to see how the mass of magnesium affects the volume of gas produced.
Comparing fuels
Matching
Year 8
3
No diagram
A __________ variable is any variable that is kept constant throughout the experiment to ensure that the test results are due solely to the change in the independent variable.
Comparing fuels
Short answer
Year 8
1
No diagram
Which one of the following is a correct statement about combustion?
Comparing fuels
Multiple choice
Year 8
1
No diagram
If the independent variable is the type of fuel, what would the dependent variable be in an experiment comparing energy transfer?
Comparing fuels
Multiple choice
Year 8
1
No diagram
A __________ is a substance that releases its stored energy when it undergoes combustion. It's crucial for the process of energy transfer by heating.
Comparing fuels
Short answer
Year 8
1
No diagram
Why is it important to use the same mass of fuel for each measurement when comparing the energy released by burning different fuels?
Comparing fuels
Multiple choice
Year 8
1
No diagram
Order the following steps to correctly set up an experiment comparing the energy transferred by different fuels, starting with recording the starting mass of each fuel.
Comparing fuels
Ordering
Year 8
1
No diagram
What role do control variables play in an experiment comparing the energy transferred by burning different fuels?
Comparing fuels
Multiple choice
Year 8
1
No diagram
Match the following terms to the correct definitions.
Power stations
Matching
Year 8
4
No diagram
In a chemical reaction the __________ in the reactants are rearranged to form new substances.
