science teacher's guide - DepEd Naga City

Teacher's GuideModule 2: Substances & MixturesTeaching Tips• Emphasize that the samples that will be used in Part A are theproducts from Activity 1. Part B will not be using the ones collectedfrom Activity 1. However, after the activity, students will infer themelting behavior of one of its products.• The melting dish made by other classes or batches may be used.You may skip the construction of an improvised melting dish if it isalready available.• In case some materials for Part B are not available, a video mayserve as an alternative. To get a copy of this video, please accesscurriculum.nismed.upd.edu.ph.• Allow students to tinker with the samples so they may be able togive a rich description for each of them. Hand lens, if available, maybe used.• Let the students assemble the setup for boiling. This will give anopportunity for the students to enhance their lab/manipulativeskills. This can also be included as an assessment.• Review techniques in the proper use of a laboratory thermometer.Make sure temperature is read at the eye level. There is no need toshake the thermometer to bring the reading to zero.Grade 7 Science: MatterDiversity of Materials in the Environment 22