Página — Uerakua Anapu Uantakua Projects And Readings 3° Secundaria (pág. 41)

4. Complete the following sentences with the correct form of the verbs in parentheses.

a)Ⅰ(learn) in this project that electrolytes (save) people's lives.

b)Ⅰ_(not/do) any experiment last school year; but I (do) a few during this one.

c) Scientists (just/make) many discoveries on behalf of human beings.

d)Scientists (just/tell) us how to solve the climate change crisis but people (not/isten) carefully.

e))My science magazine (arrive) almost every week since I first (subscribe).

f)With the help of technology, doctors and nurses (make)significant steps in treating and preventing diseases.

g)The effects of technology on society (be) both positive and negative.

a s a p

Reading

Individually, put the following steps to perform an experiment in order by writing the correct number on the line.

Pour the upper liquid into another container until it separates from the lower liquid.

Subsequently, pour the lower liquid into another container to separate it from the sand or earth sediments.

Place a container for liquids, preferably transparent,of500ml.

Add the liquids to the transparent container:

Add a tablespoon of sand or soil.

Mix the materials perfectly well.

Measure 250 ml of water and 100 ml of edible oil.

Wait until the elements are separated.


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