Unit 4: Natural Science Learn Together Primary 4 1
Unit 4: Natural Science Learn Together Primary 4 1
Unit 4: Natural Science Learn Together Primary 4 1
Class:
b Plants sustain life on the planet because they produce oxygen / carbon dioxide.
c During the day / During the day and at night, plants perform photosynthesis.
d During the day / During the day and at night, plants perform respiration.
c
b e
d
c f e
g f
4 Put the sentences about the lifecycle of an angiosperm in the correct order.
a The fruit falls, opens and releases the seeds.
a b c
d e
6 Read the sentences and write T (true) or F (false). Correct the false sentences.
a Birds are the only animals which have feathers.
b All birds have fins / wings but some birds cannot swim / fly.
c Reptiles are usually viviparous / oviparous and most are herbivores / carnivores.
d Amphibians breathe with gills / lungs when they are babies and go through
photosynthesis / metamorphosis to change into adults.
e Fish have scales / shells to protect their bodies and use tails / tentacles to move through
the water.
Sea cucumbers have move and must filter food from the water.
annelid sponge cnidarian
a b c