G4 STEM Q2 Reviewer

It is good to use hydropower or dams for electricity because it does not give off air pollution when it is operating.

A turbine is basically a motor connected backward. It is connected to the motor, and its movement generates electricity.

It is practical to put wind turbines in urban places like the city.

Hydropower is a renewable energy source

Building dams for hydropower is not very expensive.

Plan is one of the STEM processes/steps. What are the activities in the 'Plan' step?

• identifying and preparing of materials

• sketching the prototype

• listing all the required steps to make your prototype

• all of the above

A _____________ is connected to the motor, and its movement generates electricity.

• wind turbine

• water wheel

• both a and b

• none of the above

What is the problem we need to solve? This question is for the '______' STEM process.

• Improve

• Ask

• Test

• Imagine

Samples sources of energy include _________, _________, geothermal, biomass, ocean and ________. Choose all the correct answers.

• solar

• Hydropower or water

• Wind

• Land

Dams capture energy from a renewable energy sources such as ____________. It can reduce the amount of fossil fuels used to generate electricity.

• Wind

• Water

• none of the above

• all of the above