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.

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.

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.

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

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.

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.

Accuracy Precision

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

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

About 18 meters. About 4 seconds.

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

Silicon

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.

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

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

Good luck!