Another word for fixing a problem is _____________ it.
inventing
challenging
solving
experimenting
A(n) __________________ is an idea about how to do something.
suggestion
invention
design
expectation
Something that is difficult to do is a(n) ________________.
experiment
challenge
structure
invention
If you talk about how things are alike and different, you are ____________ them.
comparing
designing
contrasting
testing
