Lab Safety Rules
What must you do before touching or tasting any materials in the lab?
Never touch or taste materials unless instructed by the teacher.
Which piece of equipment flushes hazardous chemicals out of your eyes?
Eyewash Station.
Is "The liquid in the beaker is blue" an observation or an inference?
Observation (it relies directly on the sense of sight).
What term describes gathering factual information directly using your 5 senses?
Observation
Alex tastes a clear liquid in a beaker to check if it is water. What rule was broken?
Never touch or taste materials unless instructed by the teacher.
What two safety steps are required before working near chemicals or flames?
Wear safety goggles and tie back long hair.
What symbol warns you to keep water away from cords and electrical outlets?
Electrical Shock Symbol.
Identify the inference: "The ground outside is wet, so it must have rained last night."
"It must have rained last night".
What is an educated guess about what will happen next based on evidence?
Prediction
Predict what happens when red food coloring drops into hot water vs. cold water.
It spreads faster in hot water because warm particles move quicker.
What is the immediate step required if glass breaks or a spill occurs?
Report it immediately to the teacher.
Name the equipment used specifically to smother fires on people or objects.
Fire Blanket
Besides an observation, what else is required to formulate an inference?
Prior knowledge and logical reasoning.
Science is learning about the natural world through observation and what else?
Logical reasoning.
You spot a cracked test tube before starting a lab. What is the hazard and proper rule?
Hazard: Glass shattering or causing cuts. Rule: Report broken glass immediately and do not use damaged glassware.
Why is horseplay strictly prohibited during lab investigations?
It creates hazards that lead to accidents, spills, injuries, and broken equipment
Where should broken glassware and disposable lab chemicals be thrown away?
In designated disposal bins, never in standard trash cans.
Why can two scientists look at identical animal tracks and draw different inferences?
They apply different prior knowledge and reasoning to the same facts.
What 3-step cycle was used during the Venus Flytrap investigation?
Observe, Wonder, Predict
"I see footprints in the mud, so a bear was here." State the observation and the inference.
Observation = footprints in mud; Inference = a bear was here.
What safety step must every student complete at the end of every lab investigation?
Wash hands thoroughly with soap and water.
What safety equipment washes hazardous chemicals off your entire body during a severe spill?
Safety Shower
Turn this inference into an observation: "The animal was running fast."
"The animal's footprints are spaced far apart in the mud".
What main element separates a scientific observation from a prediction?
Observations focus on present facts; predictions focus on future outcomes based on evidence.
A Venus Flytrap snaps shut on an insect. Give 1 sensory observation and 1 "Wonder" question.
Observation = leaves closed shut; Wonder = "I wonder what triggers the leaves to close?"