jueves, 23 de abril de 2020

4º PRIMARIA: SOLUCIONARIO SCIENCE (20-24 ABRIL)

LIVING THINGS

1.      Circle the respiration words blue, the nutrition words green and the reproduction words red.

viviparous      herbivores      gills      omnivores      carnivores      lungs      oviparous

2.      Match and write the sentences.











All animals need oxygen to live.
Amphibians have gills when they are young and later develop lungs. 
Mammals produce milk to feed their babies. 
Most vertebrate animals are omnivores or carnivores.
Oviparous animals lay soft or hard eggs.
3.      Which is the odd one out?

a)
fish
young amphibians
reptiles
b)
birds
mammals
fish
c)
lions
humans
pigs

4.      Write what each animal is. Follow the example given.
a)    When I’m hungry, I eat both animals and plants.     It’s an omnivore!
b)    To have babies, I lay eggs. It’s oviparous!
c)    I can breathe in the water. It’s a fish!
d)    I produce milk to feed my babies. It’s a mammal!
e)   When I was a baby, I could breathe in water, but now I can’t. It’s an amphibian.


LIVING THINGS

1.    Order the words and write sentences.

a)  to seed pollen the a ovule joins the make
The pollen joins the ovule to make a seed.
b)  reproduction sexual some and use plants asexual
Some plants use sexual and asexual reproduction.
c)  fertilisation in no are reproduction flowers asexual there or
In asexual reproduction there are no flowers or fertilisation.

2.    Are these sentences true or false? Correct the false ones.

a)  The pollen goes from the pistil to the stamen. False. The pollen goes from the stamen to the pistil.

b)  The pollen joins an ovule to make a seed. This is called pollination. False. This is called fertilisation.

c)  Runners are stems which grow along the ground. True
d)  Tubers are swollen stems which grow above the ground. False. Tubers are swollen stems which grow below the ground.
e)  Plants absorb carbon dioxide and produce oxygen. True

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