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Everyday Chemical Changes — Free MYP1 Sciences Practice Questions
1QuestionFireworks and ExplosionsConcept Practice
2 marks~3 minCriterion D
At a firework display, a safety zone of 50 metres is kept clear of people.
a
Identify one reason why this 50-metre safety zone is needed. [1]
b
Describe how the safety zone should change on a windy day, and explain why. [1]
Solutions
2QuestionChemical Reactions in CookingAssessment Practice
5 marks~8 minCriterion C
A potato is baked in an oven at . The table below shows how long it takes to cook.
| Mass of potato (g) | 100 | 150 | 200 | 250 |
|---|---|---|---|---|
| Cooking time (minutes) | 15 | 22 | 30 | ? |
a
Identify the pattern in the cooking times shown in the table. [1]
b
Describe how mass affects cooking time, using the data to support your answer. [2]
c
A student says: "A 200 g potato takes twice as long to cook as a 100 g potato." State whether you agree or disagree, and give one reason using the data. [2]
Solutions
3QuestionChemical Reactions in CookingConcept Practice
2 marks~3 minCriterion A
The diagram below shows bread being made. Flour, water, and yeast are mixed together and baked to produce a loaf of bread and carbon dioxide gas.
a
Identify the reactants in this reaction. [1]
b
Identify the products in this reaction. [1]
Solutions
4QuestionFireworks and ExplosionsConcept Practice
2 marks~3 minCriterion B
A student tests four sparklers. Each sparkler contains a different amount of potassium nitrate: 1 g, 2 g, 3 g, or 4 g. She measures how high the sparks reach, in centimetres. All sparklers are the same length and are lit the same way.
a
Identify the independent variable in this investigation. [1]
b
Describe what the student does to make this a fair test. [1]
Solutions
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