Astound
to surprise someone a lot
Measurement
the size, length, or amount of something found by measuring
Heart
the part of your body that pumps blood
Size
how big or small something is
Merely
only; just
Mass
how much matter is in something (how heavy or big it is)
Minute
60 seconds
Tip-top
the very best
Efficient
working well without wasting time or energy
Well-balanced
steady and even; not falling over
Skimp
to use too little of something because you want to save it
Blood
the red liquid that moves through your body and keeps you alive
Increase
to make something become bigger, larger, or more
Litre
a unit for measuring liquid (like water or milk)
Adult
a person who is fully grown
Pump
to move a liquid from one place to another using a machine or muscle
