year 7, term 2, science CAT

• what is accuracy?

  The closeness of a measurement to the true value.
• what is precision?


  is a measure of how close multiple measurements are to each other.
• Independent variable meaning


  its what is being changed
• what is a dependent variable


  what you measure or the variable that gives you Data
• what is a controlled variabe? is a factor in an experiment that is kept constant to prevent it from affecting the outcome.
• what is quantitative?


  it is related to quantity and meausurements
• what is qualitative


  its about quality so like appearance
• what is the first step on lighting a Bunsen burner? A   Turn on the gas.

  B   Light a match.

  C   Connect Bunsen burner to the gas.

  D   Turn the collar to close the airhole.

  E   To obtain a blue flame, open the airhole.

  F   Place the Bunsen burner on bench mat.

  G  Hold the match about 1 cm from the top of the barrel.

  H  The Bunsen should light and the flame should be yellow.

  F
• what is the second step on lighting a Bunsen burner? A   Turn on the gas.

  B   Light a match.

  C   Connect Bunsen burner to the gas.

  D   Turn the collar to close the airhole.

  E   To obtain a blue flame, open the airhole.

  F   Place the Bunsen burner on bench mat.

  G  Hold the match about 1 cm from the top of the barrel.

  H  The Bunsen should light and the flame should be yellow.

  C
• what is the third step on lighting a Bunsen burner? A   Turn on the gas.

  B   Light a match.

  C   Connect Bunsen burner to the gas.

  D   Turn the collar to close the airhole.

  E   To obtain a blue flame, open the airhole.

  F   Place the Bunsen burner on bench mat.

  G  Hold the match about 1 cm from the top of the barrel.

  H  The Bunsen should light and the flame should be yellow.

  D
• What is the fourth step on lighting a Bunsen burner? A   Turn on the gas.

  B   Light a match.

  C   Connect Bunsen burner to the gas.

  D   Turn the collar to close the airhole.

  E   To obtain a blue flame, open the airhole.

  F   Place the Bunsen burner on bench mat.

  G  Hold the match about 1 cm from the top of the barrel.

  H  The Bunsen should light and the flame should be yellow.

  B
• What is the fifth step on lighting a Bunsen burner? A   Turn on the gas.

  B   Light a match.

  C   Connect Bunsen burner to the gas.

  D   Turn the collar to close the airhole.

  E   To obtain a blue flame, open the airhole.

  F   Place the Bunsen burner on bench mat.

  G  Hold the match about 1 cm from the top of the barrel.

  H  The Bunsen should light and the flame should be yellow.

  G
• What is the sixth step on lighting a Bunsen burner? A   Turn on the gas.

  B   Light a match.

  C   Connect Bunsen burner to the gas.

  D   Turn the collar to close the airhole.

  E   To obtain a blue flame, open the airhole.

  F   Place the Bunsen burner on bench mat.

  G  Hold the match about 1 cm from the top of the barrel.

  H  The Bunsen should light and the flame should be yellow.

  A
• What is the seventh step on lighting a Bunsen burner? A   Turn on the gas.

  B   Light a match.

  C   Connect Bunsen burner to the gas.

  D   Turn the collar to close the airhole.

  E   To obtain a blue flame, open the airhole.

  F   Place the Bunsen burner on bench mat.

  G  Hold the match about 1 cm from the top of the barrel.

  H  The Bunsen should light and the flame should be yellow.

  H
• What is the eighth step on lighting a Bunsen burner? A   Turn on the gas.

  B   Light a match.

  C   Connect Bunsen burner to the gas.

  D   Turn the collar to close the airhole.

  E   To obtain a blue flame, open the airhole.

  F   Place the Bunsen burner on bench mat.

  G  Hold the match about 1 cm from the top of the barrel.

  H  The Bunsen should light and the flame should be yellow.

  E
• why is the yellow flame on a Bunsen burner is considered the safety flame when is it still hot enough to burn

  It is considered the safety flame as it is more visible and far less hot than the heating flame
• What is a safety concern when conducting an experiment with chemicals?

  • spilling chemicals on yourself or others
• is this statement qualitative or quantitative? "the flowers are red"

  qualitative
• Is this statement qualitative or quantitative? "he ran 3 kilometers in 11 minutes"

  Quantitative
• is this statement qualitative or quantitative? "the food will be ready in 5 minutes"

  quantitative
• is this statement qualitative or quantitative? "it is a hot day today"

  Qualitative
• what is a hypothesis?


  it is an educated guess
• what is a prediction?


  what you think will happen
• which part of the measuring cylinder do you measure from?

  the meniscus
• what is a meniscus

  it is the curve thingy that you measure from in measuring cylinder