Unit 6 - Energy- Assessment

Look at the food label for a bar of chocolate. Give the energy of 100g of chocolate.

• 1000KJ

• 541 Kcal

• 2260 KJ

• 100g

Jayesh and Isabella carry out an investigation to compare how much energy is stored in different foods.

They burn, pasta, crisps, and dried bread and use it to heat water. They use the temperature change of the water to tell them which food has the most energy stored in it.

a Name the piece of equipment needed to measure the temperature rise.

• Ruler

• Thermometer

• Compass

• Temperature Probe

Choose which energy store is linked to how warm an object is.

Select the correct answer.

• Elastic Energy Store

• Chemical Energy Store

• Thermal Energy Store

In the investigation, Jayesh and Isabella change the type of food they burn. Decide which variable the type of food is. Select the correct answer.

• Control

• Dependent

• Independent

Jayesh plots a bar chart of their results.

Name the food with the biggest store of energy.

• Bread

• Crisps

• Pasta

Jayesh plots a bar chart of their results.

Name the food with the smallest store of energy.

• Bread

• Crisps

• Pasta

Choose which energy store is emptied when the food burns.

Select the correct answer.

• Chemical Energy Store

• Thermal Energy Store

• Elastic Energy Store

Caleb and Zoe live next door to each other. Caleb’s family uses 10 000 kWh of energy each year. Zoe’s family uses 12 500 kWh of energy each year.

a State which family will have the biggest electricity bill.

• Zoe's Family

• Caleb's Family

• Neither

• Both

Zoe watches television for 2 hours one evening. The power of the television is 0.1 kW. The cost of 1 kWh is 12p.

Calculate the cost using this formula:

cost (p) = power (kW) × time (h) × cost per kWh (p)

• 21 X 1 X 0.1 = 2.3P

• 2 X 12 X 1 = 24

• 0.1 X 2 X 12 = 2.4p

• 1 X 12 X 2 = 24

Sunita and Liam are discussing ways of generating electricity. Sunita thinks that solar panels are a good way to generate electricity. Liam doesn’t agree and thinks that hydroelectric dams are better.

Describe one advantage of using solar panels to generate electricity.

• Renewable

• High cost of Installation

• High cost per unit

• Limited amount of exposure