8th Grade Science Guide

8.3: Ecology 3 Dimensions & Progressions

Unit 3

● Study photosynthesis in a variety of conditions. Oxygen production is used to measure the rate of photosynthesis. Light intensity, carbon dioxide levels, temperature, and wavelength of light can all be

● Gizmo

● Understand that oxygen is produced by photosynthesis. ● Determine how temperature, light intensity, and carbon dioxide levels affect rates of photosynthesis. ● Observe that the color of light can affect the rate of photosynthesis. ● Explain why photosynthesis works most slowly under green light.

varied. Determine which conditions are ideal for photosynthesis, and understand how limiting factors affect oxygen production.

Formative Assessment: 8.3.1 SEEd Formative Assessment

Activity: Joseph Priestly Jar Experiment (Candle, Mouse, Plant Combo)

Objective

Overview

Materials

● I can make inferences about results from an experiment.

● Students see the set of each of the experiments and then predict what they think happened. This is a great lead-in to connect photosynthesis and respiration.

● Joseph Priestly Experiments Slide presentation ● Bill Nye Video shows the history of the experiment

Activity: Gizmo - Cell Energy Cycle

Objective

Overview

Materials

● I can explain the cyclical nature of photosynthesis and respiration in the cell.

● Explore the processes of photosynthesis and respiration that occur within plant and animal cells. The cyclical nature of the two processes can be constructed visually, and the simplifed photosynthesis and respiration formulae can be balanced.

● Gizmo

Activity: Respiration - What is cellular Respiration?

Objective

Overview

Materials