A first-grade teacher is planning a science lesson on weather and clouds that includes the words precipitation, runoff, cirrus, and cumulus. Which of the following describes the best way for the teacher to introduce this vocabulary to students?
1) By showing pictures of different types of clouds and explaining their characteristics
2) By having students read a textbook passage about weather and clouds
3) By having students write a definition for each vocabulary word
4) By asking students to act out different types of weather conditions