Evaporation

WALA: Investigating evaporation

L.O: to present results in bar charts and line graphs.

INTRODUCTION

Go through the experiment students did on investigating evaporation.

Identify with them variable and invariable factors.

let them complete the results on the table correctly.

Guide learned to draw a line graph using the results on the table.

Lead to answer the questions on the next slide in their notebooks.

Plenary (mark the work in class)

• 1. Water evaporates more quickly from the container in the warm place than from the container in the cool place.

  OR

  More water evaporates from the container in the warm place than from the container in the cool place.

  
  

• 2. A line graph. Line graphs are used when there is smooth change or progression in the factor being measured over time, such as volume of water evaporated or an increase in temperature or plant height.

• 3 a). Evaporation happens more quickly when it is warm.

• b). Repeat the investigation several times.

  
  

• 4).Instead of putting one container in a warm place and the other in a cool place, you could let a fan blow onto one container but not onto the other container.