Mini-Quiz: Tools Used to Perform Simple Tasks

1. Is a toothbrush a tool?

   Yes, because it uses wedges and friction to perform a taskThat is correct. You know about tools. No, because you must use toothpaste to make it workSorry, not correct. Try another button. It is a simple machine, because it contains a leverGood try, but not right. Select another answer.

2. Why is friction required in a tool like a pair of pliers?

   Friction is not needed, since a pair of pliers uses two leversSorry, not correct. Try another button. Without friction, the pliers would become a scissorsOops! Wrong answer. Re-read the question and try again. Friction is needed to for the pliers to grasp the object and for you to hold onto the pliersCorrect. Good work!

3. When a crow uses a twig to probe for insects, is that really using a tool?

   No, because a twig is not a simple machineGood try, but not right. Select another answer. Yes, because it is a simple device used to perform a taskThat is correct. You know about tools. Animals are not smart enough to use toolsOops! Wrong answer. Re-read the question and try again.

Pick an answer to see instant feedback. Re-read the lesson if you miss one.