Primary 4 Science Answers

Ex 1.1	Ex 1.2	Ex 1.3
Ex 2.1	Ex 2.2	Ex 2.3
Ex 3.1	Ex 3.2	Ex 3.3
Ex 4.1	Ex 4.2	Ex 4.3
Ex 5.1	Ex 5.2	Ex 5.3
Ex 6.1	Ex 6.2	Ex 6.3
Ex 7.1	Ex 7.2	Ex 7.3

Ex 1.1

To Answer Index

A (1)1   (2)1   (3)4   (4)2   (5)4
B (1)T   (2)F   (3)F   (4)T   (5)T
C (1)lighter , less dense   (2)sunlight , water , carbon dioxide
  (3)oxygen   (4)expanded   (5)oxygen

Ex 1.2

To Answer Index

A (1)2   (2)1   (3)1   (4)3   (5)4
B (1)F   (2)T   (3)T   (4)F   (5)F
C (1)horizontal   (2)waterproof   (3)feel   (4)shape , size
  (5)oxygen , hydrogen , carbon dioxide , nitrogen

Ex 2.1

To Answer Index

A (1)3   (2)3   (3)4   (4)1   (5)4
B (1)T   (2)F   (3)T   (4)T   (5)F
C (1)hot . . . cold   (2)radiation   (3)touch   (4)heat   (5)37°C

Ex 2.2

To Answer Index

A (1)2   (2)3   (3)4   (4)1   (5)2
B (1)T   (2)T   (3)T   (4)T   (5)F
C (1)Celsius/Centigrade   (2)thermostat   (3)solar   (4)friction
  (5)the same

Ex 3.1

To Answer Index

A (1)2   (2)4   (3)1   (4)3   (5)3
B (1)F   (2)T   (3)T   (4)F   (5)T
C (1)tungsten   (2)insulator   (3)two   (4)closed   (5)series

Ex 3.2

To Answer Index

A (1)1   (2)3   (3)4   (4)2   (5)3
B (1)T   (2)T   (3)F   (4)F   (5)T
C (1)postive , negative   (2)glass covering   (3)appliances
  (4)insulators   (5)circuit tester

Ex 4.1

To Answer Index

A (1)2   (2)2   (3)4   (4)1   (5)3
B (1)F   (2)T   (3)F   (4)T   (5)T
C (1)living things   (2)buds   (3)flowers   (4)trunk   (5)tap , fibrous

Ex 4.2

To Answer Index

A (1)4   (2)3   (3)1   (4)4   (5)2
B (1)T   (2)F   (3)F   (4)T   (5)T
C (1)edible   (2)creepers   (3)flowering , non-flowering   (4)minerals
  (5)seeds

Ex 5.1

To Answer Index

A (1)4   (2)2   (3)2   (4)3   (5)1
B (1)T   (2)F   (3)F   (4)T   (5)F
C (1)air , water , sunlight   (2)stomata   (3)sepals   (4)chlorophyll
  (5)seed

Ex 5.2

To Answer Index

A (1)4   (2)3   (3)4   (4)1   (5)2
B (1)F   (2)F   (3)T   (4)T   (5)F
C (1)air   (2)seedling/young plant   (3)stem   (4)leaves   (5)dispersal

Ex 6.1

To Answer Index

A (1)2   (2)4   (3)1   (4)4   (5)3
B (1)T   (2)F   (3)T   (4)T   (5)F
C (1)inner , outer , middle   (2)206   (3)iris   (4)marrow   (5)muscles

Ex 6.2

To Answer Index

A (1)1   (2)2   (3)4   (4)3   (5)3
B (1)F   (2)T   (3)F   (4)T   (5)T
C (1)freely   (2)taste buds   (3)backbone   (4)windpipe   (5)smell

Ex 7.1

To Answer Index

A (1)4   (2)2   (3)1   (4)2   (5)3
B (1)F   (2)F   (3)T   (4)F   (5)T
C (1)Veins   (2)carbon dioxide   (3)oxygen , food , water
  (4)small intestine   (5)heart