Public Quiz: Unit 3 : Concept 3.3 Renewable Energy Resources (Science) - Primary 4 - Science

Question 1

How does the water cycle relate to the renewable nature of hydroelectric power?

It continuously replenishes the water supply for dams.

It purifies the water before it reaches the dam.

It causes erosion that creates new riverbeds.

It creates thermal energy for the dam.

Question 2

Wind and water are examples of what category of energy sources?

Fossil fuels.

Renewable energy sources.

Nuclear energy sources.

Non-renewable resources.

Question 3

What specific process was performed at a mill using wind or water power?

Distilling spirits.

Pumping irrigation water.

Refining metals.

Crushing grain.

Question 4

What is a primary characteristic of sustainable energy sources like solar and wind?

They are finite resources.

They are naturally replenished.

They are only available at night.

They produce greenhouse gases.

Question 5

How does the sun's energy contribute to air movement on Earth?

It generates a magnetic field that moves the atmosphere.

It warms different parts of Earth unequally, causing air to move.

It cools the air, creating high-pressure zones.

It directly pushes air molecules from space.

Question 6

Which common device mentioned uses small solar cells to power its battery?

Electric cars.

Solar-cell calculators.

Conventional streetlights.

Large-scale power grids.

Question 7

What is the purpose of generators in a hydroelectric dam?

They hold back the flow of water.

They control the release of water from the dam.

They convert the mechanical energy of spinning turbines into electrical energy.

They store the generated electricity for later use.

Question 8

How do current wind turbines relate to windmills built hundreds of years ago?

They use different energy sources than ancient windmills.

They look both similar to and different from older windmills.

They are fundamentally different and share no similarities.

They are entirely identical in design and function.

Question 9

What is the main purpose of a hydroelectric dam in power generation?

To increase the speed of rivers for navigation.

To prevent flooding in residential areas.

To filter water for drinking purposes.

To hold back water, building up potential energy before release.

Question 10

Which form of energy from the wind is captured by wind turbine blades?

Chemical energy.

Kinetic energy.

Potential energy.

Thermal energy.

Question 11

What is the primary characteristic of a scientific claim?

It is a one-sentence answer to a question that does not start with 'yes' or 'no'.

It is a question that guides scientific inquiry.

It is a detailed explanation of an entire phenomenon.

It is always a statement of fact that requires no further support.

Question 12

What energy transformation takes place when a wind turbine operates?

Kinetic energy of wind is transformed into electrical energy.

Sound energy is transformed into light energy.

Electrical energy is transformed into potential energy.

Thermal energy is transformed into chemical energy.

Question 13

Windmills are primarily used to convert the kinetic energy of wind into electrical energy.

True

False

Question 14

How do convergent mirrors aid in solar cooking?

They collect and focus sunlight to heat a metal pot.

They spread sunlight over a wide area to cool food.

They generate electricity for electric stoves.

They convert sunlight directly into chemical energy for cooking.

Question 15

Wind energy is considered a renewable source because the wind is a continuously regenerating natural phenomenon.