3. The gloves might have chemical residue on them.
Loose clothing could touch chemicals or flames in the laboratory.
The food or drink might become contaminated with chemicals.
Some chemicals are reactive with water; others can contaminate water supplies.
Report to your teacher; rinse your eyes thoroughly with water.
Chemicals can splash or boil out of the test tube.
Heating would cause any enclosed air, vapors, or other gases to expand; the container could blow apart and cause injury.

4. Stray materials can ignite.
Heated chemicals can splash and cause eye injury.
Use a wafting motion to direct the vapor towards your nose. Do not inhale the vapors directly.
Always pour acid into water.
You could contaminate the unused chemical in the original container.
Hold the back of your hand near the glassware.
The glassware might be contaminated with laboratory chemicals.

5. With the blade pointed away from you.
Notify the teacher so the accident can be reported and you can receive first aid.
It is stressful for the animal and you could receive germs from the animal or its waste.
The cage may be contaminated by the animal’s waste.
Substances from your hand might contaminate the experiment.
Your hands might have come in contact with laboratory chemicals.
The gas lines might be on, even if the flame is extinguished, creating a dangerous situation.

6. Burns
Cuts and bruises
Fainting
Foreign matter in the eye
Poisoning
Spills on skin

7. Do not harm the environment you are studying.
Pick up after yourself. Do not leave anything that may negatively affect the natural processes that occur in the area.
If you must take a specimen from its habitat, take only what you need.

9. The Scientific Method
Observe
Formulate a question
Collect data
Form a hypothesis
Test the hypothesis
Draw conclusions
Observation
Observations give additional data for a new hypothesis
Observe anything in nature.
What do you want to know?
Propose and answer to your question based on observations.
Experiment.
Did the results support your hypothesis? If not, modify the hypothesis based on observations.

11. Accuracy
Precision

12. Name: Erlenmeyer flask
Purpose: Hold and measure the volume of liquids
Name: Florence flask
Purpose: Hold liquids (for making solutions)
Name: Test tube
Purpose: Hold liquids
(for heating)
Name: Beaker
Purpose: Hold and measure volume of liquids
Name: Triple beam balance
Purpose: Measures mass
Name: Digital Scale
Purpose: Measures mass
Name: Buret
Purpose: Measures small volumes
Name: Microscope
Purpose: Magnifies specimens

13. Name: Stopwatch
Purpose: Measure time
Name: Bunsen burner
Purpose: Heat substances
Name: Thermometer
Purpose: Measure temperature
Name: Graduated cylinder
Purpose: Measure volume
Name: Digital multimeter
Purpose: Measure voltage, current, or resistance
Name: Ruler
Purpose: Measure length

21. About 18 meters.
About 4 seconds.

22. Gasoline, ethyl alcohol, vegetable oil, water, seawater
Ethyl alcohol and gasoline

23. Silicon

26. Lamarck
Yes, other scientists can use the strengths of the hypothesis to advance in their own work.
Develop a characteristic (such as obesity) and measure whether the trait is passed on to offspring.

27. Serving size
Calories per serving
% daily value
250 Calories
24 grams

28. prescription
Food and Drug Administration
Talk to an expert; do research using reliable sources.
Scientific studies are more reliable than advertising claims.

32. Good luck!