Sorting Materials into Groups quiz

Which of the following has lustre?

Which substance is soluble in water?

Which of the following floats on water?

Which material is transparent?

Which of these is a soft material?

Which liquid does not mix with water?

Grouping of materials makes it easier to:

Which of the following is opaque?

Which property of glass makes it useful for windows?

Which gas is soluble in water and is used by aquatic animals?

Name two objects made of wood and two made of glass. (2 marks)

Why are cooking utensils made of metals? (2 marks)

Name two materials that are translucent. (2 marks)

Why do metal objects lose their shine over time? (2 marks)

How do you test whether a material is hard or soft? (2 marks)

Why is plastic used for making buckets? (2 marks)

How can you show that oxygen is dissolved in water? (2 marks)

Name two substances that float on water and two that sink. (2 marks)

Why are some objects called rough and others smooth? Give examples. (2 marks)

Name two objects that can be made from both plastic and metal. (2 marks)

A student tested 15 materials. 6 were transparent, 4 were translucent and the rest were opaque. How many were opaque? What fraction were transparent? (3 marks)

In a float-or-sink activity, 12 objects were tested and 5 floated. What percentage of objects sank? Give two examples of objects that might have floated. (3 marks)

A class listed 24 objects in the classroom: 9 wood, 7 plastic, 5 metal and the rest glass. How many were glass? Draw a simple bar for each group or write the fraction for each. (3 marks)

A student dissolved 2 spoons of sugar in 1 glass of water. How many spoons would she need for 5 glasses to make the same sweetness? If each spoon holds 5 g, how many grams is that? (3 marks)

Out of 20 objects, 8 have lustre and 12 do not. If 7 of the lustrous objects are metals, how many lustrous objects are not metals? What fraction of all objects are lustrous? (3 marks)

Read the passage and answer the questions. Riya's mother keeps rice, pulses, sugar and salt in separate transparent jars in the kitchen. She keeps cleaning agents in a separate cupboard away from food. (i) Why are transparent jars used? (ii) Why are cleaning agents kept away from food? (iii) What is the advantage of grouping things this way? (5 marks)

Read the passage and answer the questions. In an activity, students put sugar, sand, salt and chalk powder into four glasses of water and stirred them. In two glasses the substance disappeared, while in the other two it did not. (i) Which substances disappeared? (ii) What are such substances called? (iii) What can be done to get the dissolved substance back? (5 marks)

Read the passage and answer the questions. Arjun dropped a piece of wood, an iron key, a plastic bottle cap and a pebble into a bucket of water. Some floated and some sank. (i) Which objects floated? (ii) Which objects sank? (iii) Why is it useful to know which materials float? (5 marks)

Read the passage and answer the questions. A carpenter, a potter and a tailor were asked which materials they use. The carpenter uses wood, the potter uses clay and the tailor uses cloth. (i) Name one object each person makes. (ii) Why does the potter choose clay? (iii) Why is cloth suitable for the tailor's work? (5 marks)

Read the passage and answer the questions. In a market, Meena saw a shiny steel plate, a dull old iron pan, a clear glass jar and a wooden spoon. She wanted to group them. (i) Which objects are made of metal? (ii) Why does the iron pan look dull? (iii) Group the four objects as transparent or opaque. (5 marks)

Explain why we group materials, with examples. Classify ten objects in your home on the basis of the material they are made of, and draw a neat chart. (6 marks)

Describe an activity to find which substances are soluble in water. Draw labelled diagrams for soluble and insoluble substances, and record observations for six substances. (6 marks)

Describe an activity to classify materials as transparent, translucent and opaque using a torch. Draw diagrams and list three examples of each. (6 marks)

Explain the properties of materials: appearance, hardness, solubility, floating and transparency. Give one example of how each property decides the use of a material. (6 marks)

Describe an activity to test which liquids mix with water and which do not. Draw diagrams of the results for vinegar, lemon juice, mustard oil and kerosene, and explain one practical use of this knowledge. (6 marks)