the tools, machines, or other things that you need for a particular job or activity
equipment
200
careful thought in order to try to avoid risks or danger
caution
200
...aluminized fabric is ______ ____ protect spacecraft...
fireproof material ______ _____ make space suits has been adapted.....
used to
200
=take in a gas, heat, or other substance
=reduce harmful effects
absorb
200
Hydrogen burns more cleanly than fossil fuels, creating [more / fewer] harmful emissions.
fewer
200
=in or on (a ship, bus, train, or plane)
aboard
300
=at first, initially, in the beginning
originally
300
to change your ideas or behaviour so that you can deal with a new situation
adapt
300
The designers of early spacecraft found ____ necessary to develop special material that was lightwight....
it
300
The [eventual / eventually] development of a hydrogen-burning engine for use in cars....
eventual
300
And much of the equipment designed to be used aboard spacecraft [has / have] been adapted .....
has
400
something good that happens unexpectedly as a result of something else
spin-off
400
=very: used for emphasizing an adjective or adverb
extremely
400
These crystals, _______ are highly stable during temperature changes, now make sure that....
NASA developed the technology _______ eventually evolved into the barcodes.
which
400
Space flight researchers are constantly studying (burn, materials, different, how)....
how different materials burn
400
But perhaps most important [is / are] the tiny but highly effective pumps .....
are
500
These adapted space technologies are known ____ "space spin-offs"...
as
500
In the early years of space travel, these spin-offs generally ________ by chance...
occurred
500
If a clock _______ good ______, it always shows the correct time.
keeps, time
500
=made from artificial materials or substances
=false, nor real
synthetic
500
something that you can choose instead of something else