BTEC L3 Unit 3 science quiz

A thermometer measures to the nearest degree. what is half the increment?

• 0.05

• 5

• 0.5

• 50

Resistance is measured in

• Volts

• Amps

• Watts

• Ohms

A 3W bulb is left on for 30 seconds. How many joules of energy does it use?

• 9

• 900

• 90

• 10

To measure the resistance of a wire you need

• a joule meter

• voltmeter

• ammeter

• voltmeter and ammeter

A device uses 2A. What fuse should be fitted?

• 10A

• 5A

• 3A

• 1A

A quadrat is best used to measure

• % cover

• Surface area

• Distribution of species

• Area of a field

When a enzyme and a substrate are joined an ????? is formed

• Enzyme complex

• active site

• enzyme-substrate complex

• substrate-enzyme complex

What word do you need to include in a null hypothesis?

• some

• most

• often

• no

Why should you use a switch in a circuit?

• To prevent the fuse blowing

• To control the voltage

• To prevent the resistance changing

• To help measure the current

What do error bars show?

• range

• mean

• standard deviation

• chi squared