2.1 Practical Investigation

Do Now from Monday 31st May

Parts of Scientific Investigation

Ms. Adviento's and Ms. Bates' Slides

2.1 Slides (ADE)
Osmosis practice 1.pptx

HYPOTONIC Solutions

Hypotonic solutions are very dilute solutions. E.g. pure water.

The water concentration is higher in the extracellular environment, so the water is going to want to move into the cell. 

The cell grows in size and becomes TURGID (plant). The animal cell keeps growing until the cell membrane ruptures (LYSIS).

ISOTONIC Solutions

Isotonic solutions are neither concentrated nor dilute. E.g. saline.

The water concentration is the same inside the cell and in the extracellular environment, so there is no net movement of water

The cell does NOT change size.

HYPERTONIC Solution

Hypertonic solutions are very concentrated solutions. E.g. very salty or sugar water.

The water concentration is higher in the cell, so the water is going to want to move out of the cell and into the extracellular environment.

The cell shrinks in size and becomes FLACCID (plant) or PLASMOLYSED (animal).

Formative 1: Osmosis in Gummy Bears / (We did the Carrot one)

2.1 - Gummy Bear Investigation Report
Marking Schedule_Gummy Bears
"Other Sources" for Gummy Bear Osmosis
Control Variable Retrieval Grid

Formative 2: Osmosis in Turnips

2.1 - Formative Assessment Report
Marking Schedule for the Formative Assessment Report
Practice Osmosis Experiment (for teachers).docx

Last Minute Reminders

Last-Minute Reminders