Scientific Measurements and Tools - G7

• Based on scientific notation, the exponent will be positive if the decimal point moves to the left.
• Based on scientific notation, the exponent will be negative if the decimal point moves to the right.
• Based on standard notation, the exponent will be positive if the decimal point moves to the right.
• Based on standard notation, the exponent will be negative if the decimal point moves to the left.
• pH paper estimates the acidity of a liquid substance.
• Spring scale measures the weight or the amount of force applied to an object.
• Thermometer: an instrument used to measure temperature.
• A science journal is used to record observations, write questions and hypotheses, collect data, and analyze the results of scientific inquiry.
• What does the spring scale measure?

  The weght or amount of force
• Balance: used to measure the mass of an object
• 1 centimetre is equivalent to 10 millimetres.

  Equation form: 1 centimetre multiplied by 10 = 10 millimetres.

  : 10 millimetres divided by 10 = 1 centimetre.
• 1 metre is equivalent to 100 centimetres.

  Equation form: 1 metre multiplied by 100 = 100 centimetres.

  : 100 centimetres divided by 100 = 1 metre.
• 1 kilometre is equivalent to 1000 metres.

  Equation form: 1 kilometre multiplied by 1000 = 1000 metres.

  : 1000 metres divided by 1000 = 1 kilometre.
• The difference between precision and accuracy is that precision shows how similar or close repeated measurements are to each other whilst accuracy shows how close measurements are to the true or accepted value.