This requires a device which remains open until the desired depth is reached, and then closes securely, retaining the sample. Objectives Students will investigate how changes in salinity and temperature affect water density. Students will design and evaluate the effectiveness of devices to sample specific water layers. Challenge students to create a bottom sampling device. Explore Procedure Complete Activity 1.4.2 lab investigation.
Ocean water is sampled for chemicals and organisms.
The depth at which the sample was gathered must be accurately known. The temperature at time of collection must be known. It must not allow contaminants to enter as it's being brought up on deck Back to Table of Contents . Back to Activity 1.4 . Back to Activity 1.4.1 .