Engineering is simply applied sciences. Taking science knowledge and using it. So in science class we experience this by doing design solutions.
Identify a problem
Understand the science of the problem
Research
Come up with a design solution
Understand the science of the design solution
Make a model of the design solution
Make the design solution
Come up with criteria
What is needed for it to work
What will it do when it works
Come up with constraints
What can't it do when it is works
What limits it as it is working
Rank the criteria to come up with a list of trade-offs
Test it
Come up with an investigation
Collect results
Analyze results
Revise
Look at trade-offs
Create a cost benefit analysis
Eliminate constraints
Make a new model
Repeat 7&8