Household Energy Exploration

Name:

Date:

📚 Part 1: Multiple Choice & Matching

1. What does the term 'vampire' energy mean?

Energy used by large appliances when running full power

Energy lost as heat from an appliance while it operates

Energy consumed by devices that are switched off but still plugged in

Energy produced by solar panels at night

2. Which household device commonly uses energy continuously (24/7)?

Kettle

Fridge / freezer

Toaster

Hair dryer

3. A TV in standby draws about 5 W. How much energy (kWh) does it use in one day (24 h)?

0.12 kWh

1.2 kWh

12 kWh

0.005 kWh

4. Which action will best reduce vampire energy at home?

Leave chargers plugged in but not connected to devices

Use power boards with an on/off switch and turn them off overnight

Run the heater at highest setting all day

Keep lights on in empty rooms

5. Match each household item to the main form of energy transfer it produces while operating.

A. Toaster

B. Fan

C. LED Lamp

D. Washing machine (spin)

E. Smartphone on charger

1. Mechanical

2. Electrical (standby)

3. Light

4. Heat

5. Convection (hot air)

✏️ Part 2: Short Answers & Activity

6. Energy flow mapping (group task): On the floor plan at the front, draw arrows from the electricity meter to three appliances. Label each arrow with the form of energy produced (e.g. electrical → light, electrical → heat). Use the box below for notes.

7. Explain the law of conservation of energy in one sentence and give a household example.

8. Cost calculation: If electricity costs $0.30 per kWh, a fridge uses 1.2 kWh per day. Calculate the fridge cost for one week (7 days). Show your working.

9. Exit ticket — write one simple change you will make at home to reduce vampire energy and explain how it saves energy or money.