9. Fill in the missing blanks to complete these statements. 1. Movement in the Department should be and at all times. 2. The workbench and floor should be kept and . 3. All tools and materials are to be put away by the end of the lesson. 4. Students are to remain a distance from others Students using machinery. Add all your answers in the space provided THEN press next.

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.