Daylight Only — Double Up

Quick quiz

These ask about details you only notice by really doing the task. Get every one right to pass.

1. 1. You opened the curtains instead of using lights. When does that save the least?

   Around middayOn a bright morningWhen the room faces the sunOn a dark, overcast late afternoon

2. 2. Lowering the thermostat by 1°C typically cuts heating energy by about…

   5–10%Less than 0.5%About 50%Nothing — it only saves money

3. 3. Why should you decide what you want before opening the fridge?

   Cold air spills out and the fridge works to cool down againThe light bulb overheatsFood spoils instantly when exposedIt resets the thermostat

4. 4. After unplugging idle chargers, which device usually still draws standby power when left plugged in?

   A disconnected extension cordA battery-free wall clockA wooden lamp switched off at the wallA TV or console with a standby light