تدريب عام: Unit 3 : Concept 3.3 Renewable Energy Resources (Science) - Primary 4 - Science

السؤال 1

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

It creates thermal energy for the dam.

It purifies the water before it reaches the dam.

It causes erosion that creates new riverbeds.

It continuously replenishes the water supply for dams.

السؤال 2

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

Fossil fuels.

Nuclear energy sources.

Renewable energy sources.

Non-renewable resources.

السؤال 3

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

Crushing grain.

Pumping irrigation water.

Distilling spirits.

Refining metals.

السؤال 4

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

They produce greenhouse gases.

They are finite resources.

They are only available at night.

They are naturally replenished.

السؤال 5

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

It cools the air, creating high-pressure zones.

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

It directly pushes air molecules from space.

It generates a magnetic field that moves the atmosphere.

السؤال 6

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

Conventional streetlights.

Large-scale power grids.

Solar-cell calculators.

Electric cars.

السؤال 7

What is the purpose of generators in a hydroelectric dam?

They hold back the flow of water.

They store the generated electricity for later use.

They control the release of water from the dam.

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

السؤال 8

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

They are entirely identical in design and function.

They look both similar to and different from older windmills.

They are fundamentally different and share no similarities.

They use different energy sources than ancient windmills.

السؤال 9

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

To filter water for drinking purposes.

To prevent flooding in residential areas.

To increase the speed of rivers for navigation.

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

السؤال 10

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

Chemical energy.

Potential energy.

Thermal energy.

Kinetic energy.

السؤال 11

What is the primary characteristic of a scientific claim?

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.

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

السؤال 12

What energy transformation takes place when a wind turbine operates?

Kinetic energy of wind is transformed into electrical energy.

Thermal energy is transformed into chemical energy.

Sound energy is transformed into light energy.

Electrical energy is transformed into potential energy.

السؤال 13

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

False

True

السؤال 14

How do convergent mirrors aid in solar cooking?

They collect and focus sunlight to heat a metal pot.

They convert sunlight directly into chemical energy for cooking.

They spread sunlight over a wide area to cool food.

They generate electricity for electric stoves.

السؤال 15

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