Determining the mass of an empty beaker
Scooping 20 g of chemical powder from a storage container
Constructing a model of an animal cell
Viewing a stained slide with a microscope
Place both powders in the trash and start over
Place a drop of water on a small amount of each powder and observe
Proceed with the experiment
Check with her teacher for guidance
It can cause injury to body tissue
It is unstable in water
It catches fire easily
It is hazardous to the environment
Wipe the glassware with paper towels
Leave the materials exactly where they are for the next sampling activity
Turn the sample bottles and pipettes upside down to drain and dry
Wash all the supplies with detergent, rinse thoroughly, and allow them to dry
Testing a substance by tasting it
Watering a plant without wearing gloves
Using a glass rod to stir liquid in a glass beaker
Detecting an odor by moving air toward you with your hand
Put gloves on over his hands.
Rinse his arm with water and inform his teacher
Clean up the other spilled drops before anyone else is hurt.
Look in his notes to find out if the chemical was dangerous.
Wipe the lab bench with a paper towel, and rinse hands with alcohol.
Wipe the lab bench with dry brush, and dry hands with a paper towel.
Wipe the lab bench with disinfectant, and wash hands with soap and water.
Wipe the lab bench with a paper towel, and wash hands with soap and water.