Science Quiz-energy: Heat Transfer, Electricity, Wave Energy

1. What is a wave

Energy moving from point to point

A build up of water in the ocean that crashes in to shore

Enrgy

A wave is defined as energy moving from one point to another. This energy can be transferred through various mediums such as water, air, or even electromagnetic fields. In the context of ocean waves, the energy is carried by the movement of water particles, causing them to oscillate up and down or back and forth. This energy propagates through the water, eventually reaching the shore where it crashes or breaks. Waves can also occur in other forms, such as sound waves or light waves, where the energy is transmitted through air or electromagnetic fields respectively.

Explanation

A wave is defined as energy moving from one point to another. This energy can be transferred through various mediums such as water, air, or even electromagnetic fields. In the context of ocean waves, the energy is carried by the movement of water particles, causing them to oscillate up and down or back and forth. This energy propagates through the water, eventually reaching the shore where it crashes or breaks. Waves can also occur in other forms, such as sound waves or light waves, where the energy is transmitted through air or electromagnetic fields respectively.

2. Match the type of heat transfer with the definition

Conduction

Convection

Radiation

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3. Light coloured objects ____________ heat.

Light colored objects absorb heat. When an object is light in color, it reflects most of the light that falls on it. However, it also absorbs a small amount of light, and this absorbed light is converted into heat energy. Dark colored objects, on the other hand, absorb more light and therefore more heat. So, the correct answer is "absorb."

Explanation

Light colored objects absorb heat. When an object is light in color, it reflects most of the light that falls on it. However, it also absorbs a small amount of light, and this absorbed light is converted into heat energy. Dark colored objects, on the other hand, absorb more light and therefore more heat. So, the correct answer is "absorb."

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4. What is the law of Conservation of energy?

Energy can be created but not destroyed

Enrgy can destroyed but not created

Energy cannot be created nor destroyed it can only change form

Energy can only be transformed in to Electrical energy

The law of Conservation of energy states that energy cannot be created nor destroyed, it can only change form. This means that the total amount of energy in a closed system remains constant, although it can be converted from one form to another. This principle is based on the understanding that energy is a fundamental property of the universe and is always conserved.

Explanation

The law of Conservation of energy states that energy cannot be created nor destroyed, it can only change form. This means that the total amount of energy in a closed system remains constant, although it can be converted from one form to another. This principle is based on the understanding that energy is a fundamental property of the universe and is always conserved.

5. V ----- This is Ohm's law i | r

True

False

The given answer is true because the table represents Ohm's law, which states that the current (i) flowing through a conductor is directly proportional to the voltage (V) applied across it and inversely proportional to the resistance (r) of the conductor. Therefore, the statement "This is Ohm's law" is correct.

Explanation

The given answer is true because the table represents Ohm's law, which states that the current (i) flowing through a conductor is directly proportional to the voltage (V) applied across it and inversely proportional to the resistance (r) of the conductor. Therefore, the statement "This is Ohm's law" is correct.