BCP8 Combined Science GCSE

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  • Created by: kokokeisy
  • Created on: 27-04-18 10:50
What three ways can you measure the pH of something,
Indicator, Indicator Paper, and a pH probe
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What equipment can you use to measure the time taken for a change
a stopwatch or lightgate
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Pros to Lightgates and pH probes
Reduce errors and give an accurate value
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Precautions to take near chemicals in an experiment
Work in a WELL VENITLATED area or in a fume hood, Never directly touch chemicals, be careful when mixing chemicals
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Precautions to take with equipment in an experiment
Stop equipment falling using clamp stands, wear insulated gloves with heated materials, laser safety goggles, use low voltage and current to prevent overheating and damage
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Precautions to take with ethical issues in an experiment
Animals should be treated humanely, safely, and ethically, + returned to their original habitat, and not in overcrowded conditons
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Precautions to take when working in the lab
Wear sensible cloting, wear a lab coat, safety goggles and gloves, keep flammable objects away from bunsen burner
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How would you set up an electrolysis experiment to find out the gas produced?
Place a test tube in the electrodes, and gas produced from electrodes woul be collected into the test tubes.
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How do you set up a Bunsen Burner?
(1)Connect to gas tap and place on heat-proof mat. Make sure the hole is closed (2)Light Splint and turn on gas. Yellow Flame.(3)Open the hole more and the flame should turn blue.
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What makes a Bunsen burner stronger?
If you open the hole more; itll heat your substance more strongly
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Wheres the hottest part of the flame in a Bunsen burner?
Just above the blue cone near the middle of the blue flame
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What should you do if you're heating something over the flame of a bunsen burner?
Put a tripod or gauze over the bunsen burner before lighting it.
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What is a water bath and how can it be heated?
A container filled with water heated to a specific temperature by a bunsen burner or heating a beaker of water
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Why cant you heat a substance in water bath above 100 degrees?
Water boils at 100 degress, so it cant get hotter than this
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What are electric heaters made out of and although you can heat temperaturs above water temp, whats the con to it?
Theyre made out of metal plates which act like a water bath. The vessel is only heated from the bottom so to get an evenly spread high temperature, you'd have to stir it.
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What wires come with a voltmeter and what ports do they go into ?
Red (positive) wire and the Black (Negative) wire goes into the red and black port.
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Why should you turn your circuit off between readings?
To prevent wires overheating and potnetially affecting your results
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Where should you connect a voltmeter in a circuit?
In Parallel
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Where should you connect an ammeter in a circuit?
In series
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Define a Multimeter
Devices that measure a range of properties e.g p.d, current, resistance
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How do you find the potential difference on a multimeter?
Red Wire should be plugged in port that has a V(VOLT)
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How do you find the current on a multimeter?
Use a port labelled A or mA (AMPS_)
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How do ou measure speed using a light gate?
Connect a light gate using a computer, measure length of object. COmputer measures speed
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How do you measure the accerleration using a light gate?
Use an object that interrupts the signal twice in a short period of time. COmputer measures speed to calculate the accerletation
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Other cards in this set

Card 2

Front

What equipment can you use to measure the time taken for a change

Back

a stopwatch or lightgate

Card 3

Front

Pros to Lightgates and pH probes

Back

Preview of the front of card 3

Card 4

Front

Precautions to take near chemicals in an experiment

Back

Preview of the front of card 4

Card 5

Front

Precautions to take with equipment in an experiment

Back

Preview of the front of card 5
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