IG Practicals revision

Reorder the following in design an experiment

• Determine the IV, DV, and control variables

• Describe general steps

• State apparatus used to measure IV and DV

• Remember to repeat for 6 readings and Each measurement should repeat for 3 times. And then calculate a mean value

• Plot a graph DV against IV

Force is applying to an object and causes acceleration. State the IV and DV.

To produce more accurate results, which method is reasonable?

• repeat experiment, to calculate average reading.

• when measure length, look perpendicular to the ruler

• check for zero when using scale

• when investigate cooling or heating, use insulation method

When measure the cooling or heating effect of water, which of the following is reasonable?

• same initial temperature

• same volume of water

• same room temperature

• stir the water in the beakers

When measure the specific heat capacity of water, heat loss could be reduced by?

How to check if a rule is vertical?

What precautions should be taken in experiments about formation of image by a lens?

• use a darker area

• object and lens are at same height on bench

• avoid parallax error in measurement

• object is perpendicular to bench

Safety precautions in measure hot object?

which of the following is correct regarding safety?

• while changing components of the circuit the power should be switched off so that one should not experience electric shocks

• safety goggles, gloves and other safety components should be used while handling experiments

• live wire should not be touched

• while handling a mercury thermometer one should take care of the mercury spills.

护目镜的英文是？