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Elements Compounds and Mixtures — Free MYP1 Sciences Practice Questions
1QuestionCompounds and Chemical FormulaeConcept Practice
2 marks~3 minCriterion A
Look at the two chemical formulas below.
Water: Table salt:
Describe what each formula tells you about the atoms in that compound. [2]
Water: Table salt:
Describe what each formula tells you about the atoms in that compound. [2]
Solutions
2QuestionCompounds and Chemical FormulaeAssessment Practice
6 marks~9 minCriterion C
Salt () is spread on icy roads in winter to make them safer. When the ice melts, the salty water can wash into rivers and lakes.
a
Identify one benefit of spreading salt on icy roads. [1]
b
Describe one way that salt washing into rivers can cause harm. [2]
c
Some people say salt cannot be harmful because it is natural. Describe why this idea may not be correct. Use an example to support your answer. [3]
Solutions
3QuestionDefinition of Elements and SymbolsConcept Practice
2 marks~3 minCriterion B
A student mixes iron filings with sand and uses a magnet to separate them. The student tests three different masses of iron filings: 10 g, 20 g, and 30 g. Each time, the student measures the mass of iron the magnet picks up.
a
Identify the independent variable and the dependent variable in this investigation. [1]
b
Describe one thing the student should keep the same to make this a fair test. [1]
Solutions
4QuestionSolutions and Pure SubstancesAssessment Practice
6 marks~9 minCriterion D
A student puts two dishes on a sunny windowsill. Dish A has 20 mL of pure water. Dish B has 20 mL of salty water. After three days, Dish A is empty and clean. Dish B has a white powder left behind.
a
Name the substance that makes up the white powder left in Dish B. [1]
b
Describe why Dish A leaves nothing behind after three days. [2]
c
Describe one way in which evaporation is a useful method for checking if a drink is pure, and one way in which it is not useful. [3]
Solutions
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