The Sun

The Sun

Assessment

Flashcard

Science

6th - 8th Grade

Hard

Created by

Barbara White

FREE Resource

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35 questions

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1.

FLASHCARD QUESTION

Front

Light-year Noun

[lite-yeer]

Back

Light-year


The distance light travels in a vacuum in one year, a unit used for measuring vast astronomical distances.

Example: This diagram shows a light-year is a unit used to measure the vast distance between stars, like the 4.2 light-year distance from our Sun to Proxima Centauri.
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2.

FLASHCARD QUESTION

Front

Luminosity Noun

[loo-mi-nos-i-tee]

Back

Luminosity


The total intrinsic amount of energy a star or other celestial object radiates per unit of time.

Example: The Sun, a star, has high luminosity, meaning it emits a large amount of energy as light and heat, which travels through space to Earth.
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3.

FLASHCARD QUESTION

Front

Electromagnetic radiation Noun

[eh-lek-tro-mag-net-ik ray-dee-ay-shun]

Back

Electromagnetic radiation


A form of energy propagated as waves, including a spectrum of visible light, gamma rays, and radio waves.

Example: This diagram shows the electromagnetic spectrum, a range of energy waves from high-energy gamma rays to low-energy radio waves, including the visible light we see.
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4.

FLASHCARD QUESTION

Front

Intensity Noun

[in-ten-si-tee]

Back

Intensity


The measure of radiation's power per unit area, which diminishes with the square of the distance from its source.

Example: Energy from a source like the Sun spreads out as it travels; the same amount of energy covers a larger area, so its intensity decreases with distance.
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5.

FLASHCARD QUESTION

Front

Nuclear fusion Noun

[noo-klee-er fyoo-zhun]

Back

Nuclear fusion


A nuclear reaction where atomic nuclei combine to form heavier nuclei, releasing a tremendous amount of energy.

Example: Two small atomic nuclei, Hydrogen-1 and Hydrogen-2, combine (fuse) to form a larger nucleus, Helium-3, releasing a large amount of energy.
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6.

FLASHCARD QUESTION

Front

Combustion Noun

[kom-bus-chun]

Back

Combustion


A rapid chemical reaction between a substance and an oxidant, usually oxygen, to produce heat and light.

Example: This diagram shows combustion, a chemical reaction where a fuel (candle wax) reacts with oxygen (O₂) to produce heat, light, carbon dioxide (CO₂), and water (H₂O).
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7.

FLASHCARD QUESTION

Front

Proton-proton chain Noun

[pro-ton pro-ton chayn]

Back

Proton-proton chain


The main sequence of nuclear fusion steps by which stars like the Sun convert hydrogen into helium, releasing energy.

Example: This diagram shows how the Sun creates energy by fusing hydrogen nuclei (protons) into one helium nucleus through a multi-step process.
Media Image

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