4. When measuring using a ruler, align the object's edge with the edge of the ruler. _ 5. Observing can be done using a single sense.
Answer (1)
4. True. When measuring an object, you must start from the zero mark on the ruler not from the very end because not all rulers begin exactly at the edge. However, aligning the edge of the object with the 0 cm or 0 inch point is correct practice.5. True. Observation in science can use just one of the five senses—seeing, hearing, smelling, touching, or tasting. For example, you can observe color with only your eyes or smell an odor with only your nose.
