science technology (1)

1.

Why do we blink?

2.

Why does cutting onions
makes us crying?

3.

What is a cloud?

4.

Why do we blink?
1.To keep our eyes moist and
clean.
2.To help us stay awake.

5.

Why does cutting onions make us cry?
1.Because they produce a gas which irritates
our eyes.
2. Because they give off dry particles which
irritate our eyes.

6.

What is a cloud?
1.A mixture of warm gases rising from the
Earth.
2.A mixture of water vapour, ice, and dust
floating in the sky.

7.

VERB
invent
NOUN
PERSON
production
observe
design
developer
discoverer
explore

8.

VERB
NOUN
research
program
PERSON
engineer
builder
create
specialise
supervise

9.

VERB
conserve
sponsor
NOUN
PERSON
instructor