Primary 3 Science · Investigation worksheet

Diversity of Materials: Investigation Practice

Name:Date:Marks: / 20

Section A · Multiple choice 8 marks

1. Look at the bar chart. Which material is the strongest?1 mark

(A) Paper(B) Cloth(C) Foil(D) Plastic sheet

2. Look at the bar chart. How many more grams did the cloth hold than the paper?1 mark

(A) 140 g(B) 120 g(C) 60 g(D) 220 g

3. Look at the float or sink table. Which list has only objects that sank?1 mark

Float or sink test

Object	Made of	Size	Result in water
Wooden block	wood	big	floats
Glass bead	glass	small	sinks
Bottle cap	plastic	small	floats
Iron nail	metal	medium	sinks
Ceramic tile	ceramic	big	sinks

(A) wooden block, glass bead, iron nail(B) bottle cap, iron nail, ceramic tile(C) glass bead, bottle cap, ceramic tile(D) glass bead, iron nail, ceramic tile

4. Look at the waterproof test. Which sheet is waterproof?1 mark

Waterproof test (tissue placed under each sheet)

Sheet	What happened to the drop	Tissue under sheet
P	stays as a drop on top	dry
Q	soaks into the sheet	dry
R	water slowly passes through small holes	wet
S	soaks into the sheet	wet

(A) Q(B) R(C) P(D) S

5. Look at the light test. Which sheet is opaque?1 mark

Light test

Sheet	A torch bulb seen through the sheet
M	clearly
N	as a blurry glow
O	not at all

(A) M(B) O(C) N(D) None of them

6. Zara wants to find out which material is the strongest by hanging weights. Which one thing should she keep the SAME for every strip?1 mark

(A) The size of the strip(B) The material of the strip(C) The type of material she tests(D) Which strip she tests first

7. Which property is the MOST important for a material used to make a raincoat?1 mark

(A) Transparent(B) Floats on water(C) Opaque(D) Waterproof

8. A hair band must stretch and bend without breaking. Which property does the material need?1 mark

(A) Transparent(B) Waterproof(C) Flexible(D) Sinks in water

Section B · Show what you know 12 marks

9. Look at the bar chart. Mia hangs a load of 100 g on each strip. Name the materials that would tear.2 marks

10. Look at the float or sink table. Ben says, "Small things float and big things sink." Is he right? Use the table to explain.2 marks

Float or sink test

Object	Made of	Size	Result in water
Wooden block	wood	big	floats
Glass bead	glass	small	sinks
Bottle cap	plastic	small	floats
Iron nail	metal	medium	sinks
Ceramic tile	ceramic	big	sinks

11. Look at the waterproof test. Sheets Q and R are both NOT waterproof, but they fail in different ways. Explain how each one fails.2 marks

Waterproof test (tissue placed under each sheet)

Sheet	What happened to the drop	Tissue under sheet
P	stays as a drop on top	dry
Q	soaks into the sheet	dry
R	water slowly passes through small holes	wet
S	soaks into the sheet	wet

12. Look at the light test. Mia wants a window cover that lets light in but stops people outside from seeing clearly into the room. Which sheet should she use? Give a reason.2 marks

Light test

Sheet	A torch bulb seen through the sheet
M	clearly
N	as a blurry glow
O	not at all

13. Look at Ali's test. He wants to find which material is stronger, but his test is not fair. State what is wrong and how he can fix it.2 marks

Ali's strength test

	Material	Width	Length	Weights added
Strip 1	foil	2 cm	10 cm	one at a time
Strip 2	cling wrap	4 cm	10 cm	one at a time

14. Look at the table. Sam needs a squeezable water bottle that is waterproof and lets him see how much water is left. Which material should he choose? Give two reasons.2 marks

Properties of four materials

Material	Waterproof?	Flexible?	Transparent?
Clear plastic	yes	yes	yes
Glass	yes	no	yes
Cloth	no	yes	no
Metal	yes	no	no

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