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A student carried out an experiment to investigate the reaction between an acid and a base. A pH indicator and a thermometer were used to monitor changes in pH and temperature during the reaction. Name a pH indicator the student used.
Methyl orange/ litmus/ universal indicator
What colour does litmus paper turn when placed in an acid
red
What number on the pH scale represents a neutral solution
7
Name an acid
Name a base
Name a neutral substance
How could students measure the pH of a substance
By using an indicator
Describe 3 differences between a physical change and a chemical change
Answers can vary
Name a human activity that has led to global warming
Answers can vary
State a consequence of rising sea levels on coastal areas
Answers can vary
Define sustainability
The use of a resource so that it does not run out
Suggest a way in which we can reduce how much electrical energy we use
Answers can vary
The element indium (In) is used in phones. At current usage rates indium will be used up in 50 years. Suggest how humans could sustain levels of this element for future generations
Recycle/upgrade phone less often
Explain what non-biodegradable means
cannot be broken down by living organisms
From which raw materials are most plastics made?
crude oil
State 2 reasons why the recycling of plastics is considered to be of benefit to the environment
Answers can vary
