Experimental Skills

What is a hypothesis?

• A hypothesis is the right answer to an experiment.
• A hypothesis is the wrong answer to an experiment.
• A hypothesis is an educated guess.
• I don't know.

Your prediction and explanation of what will happen in an experiment is known as the...

• Hypothesis

• Conclusion

• Procedure

• Evaluation

What is the definition of a hypothesis?

• A prediction using prior scientific knowledge

• What you change in an experiment

• The title of an investigation

• The average

Which of the following should you include in a risk assessment?

• List of hazards

• Whether there is a high, medium or low risk from each hazard

• Precautions you should take to avoid the hazard

• All of these

Which of the following must be included in a risk assessment for an experiment? Tick all correct answers.

• A list of the hazards e.g. harmful chemicals being used

• The main steps of the method

• The risks involved with each hazard (what could happen)

• A list of the rules to be followed during experiments

• Precautions you should take to avoid each risk

You are heating a substance in a test tube. Always point the open end of the tube...

• Toward yourself.

• Toward your lab partner(s).

• Toward another classmate.

• Away from all people.

You are heating a piece of glass and now want to pick it up. You should...

• Use a rag or paper towels.

• Pick up the end that looks cooler.

• Use tongs.

• Pour cold water on it.

Which of the following is safe laboratory procedure?

• Taste unknown chemicals.
• Wear safety goggles when instructed to do so.
• Continue an experiment when you are unsure of the procedure.
• Mix all chemicals at the lab 

When you finish working with chemicals, biological specimens, and other lab substances, always ____.

• treat your hands with skin lotion.
• wash your hand thoroughly with soap and water.
• wipe your hands on a towel.
• wipe your hands on your clothes. 

There should not be any loud talking or messing around in the lab because ____.

• Your safety and the safety of others depends on your behavior.

• Your teacher may have a headache.

• The teacher has told you not to.

• You may not be able to hear instructions.