laboratory practice
TRANSCRIPT
Effect of chemical contaminants on the germination of seeds
• Material
• Petri plates• Sal• vinegar• then d'avet• test• dropper
Effect of chemical contaminants on the germination of seeds
• Procedure:
1. We will germinate in petri dishes d'anet then irrigated with water and mineral water with different concentrations of salt or vinegar.
Effect of chemical contaminants on the germination of seeds
• 2. Steps • Each capsule stuck a label with the name of
the group of students, and a number. each capsule will put blotter at the base, two layers thick.
• 5 d'anet will then spread around each capsule.
Effect of chemical contaminants on the germination of seeds
• Will 3 ml of liquid water in each capsule as follows:• Regain 1 capsule with water, watered water• Regain 2 capsule with water contaminated salt 1g /
ml contaminated water and vinegar watered to 50%• 3 capsule will water contaminated with salt water to
2g / ml contaminated water and vinegar watered to 75%
• Capsule 4 watered salt contaminated water to 3.5 g / ml and vinegar watered pure 100%
Effect of chemical contaminants on the germination of seeds
• Save capsules protected from light, separating two different drawers that contain salt that contain vinegar.
• Very important: will be watering at least 2 times per week using the dissolution if the paper is dry, so that the paper remains moist but not fully floating water. Also will be observing and then scored on a grill amount of seeds that have germinated.
Effect of chemical contaminants on the germination of seeds
• Questions and Comments:• Data collection:• Should be performed every Monday,
Wednesday and Friday for the duration of practice: six observations following the registration form:
Effect of chemical contaminants on the germination of seeds
Salt Day 1 Day 2 Day 3 Day 4 Day 5 Day 6
Capsule 1
Capsule 2
Capsule3
Capsule 4
Effect of chemical contaminants on the germination of seeds
Vinegar Day 1 Day 2 Day 3 Day 4 Day 5 Day 6
Capsule 1
Capsule 2
Capsule3
Capsule 4
Effect of chemical contaminants on the germination of seeds
• At the end of the observations we di the analysis of the data.
• Ratings