Energy (Part 3)

Select the renewable sources of energy that originate from the sun.

• biofuels

• coal and oil

• solar and wind

• tidal and geothermal

Allison and Khaled burn different foods to heat 20 ml of water in a boiling tube. Name the energy stores and transfers taking place in this process.

• Chemical to thermal

• Thermal to chemical

• Chemical to kinetic

• Nuclear to thermal

Allison and Khaled burns different foods to heat 20 ml of water.

Name the independent variable (the variable they change).

• Volume of water

• Temperature of water

• Type of food.

• Distance of flame from boiling tube.

Allison and Khaled burn different foods to heat 20 ml of water.

Name the dependent variable (the variable they measure).

• Volume of water

• Temperature of water

• Type of food

• Distance of flame from boiling tube.

Allison and Khaled burn different foods to heat 20 ml of water.

Name the control variables (the variables they keep the same to make it a fair test).

• Volume of water

• Temperature of water

• Type of food

• Distance of flame from the boiling tube.

Allison and Khaled burn different foods to heat 20 ml of water.

What instrument will they use to measure the temperature of water?

• Boiling tube

• Scale or digital balance

• Thermometer

• Measuring cylinder

Allison and Khaled burn different foods to heat 20 ml of water.

What instrument will they use to measure the volume of water?

• Boiling tube

• Thermometer

• Measuring cylinder

• Digital balance

Allison and Khaled burn different foods to heat 20 ml of water.

3g of food X raises the temperature of water by 15°C.

2g of food Y raises the temperature of water by 10°C.

0.2g of food Z raises the temperature of water by 2°C.

Which food had the most energy?

• Food X

• Food Y

• Food Z

• Foods X, Y and Z have the same energy

Select the correct process for electricity generation.

• Steam -> water -> turbine -> generator -> electricity

• Water -> steam -> generator -> turbine -> electricity

• Water -> steam -> turbine -> generator -> electricity

• Turbine -> water -> steam -> generator -> electricity

Which of these is NOT a pathway for energy transfer?

• radiation

• force

• electricity

• magnetism