Ch. 2 Sources of Energy Flashcard

Front

What is dark matter?

Back

Dark matter is a form of matter that does not emit, absorb, or reflect light, making it invisible and detectable only through its gravitational effects.

Front

What determines the kinetic energy of an object?

Back

The kinetic energy of an object is determined by its mass and velocity, expressed by the formula KE = 1/2 mv².

Front

What occurs during nuclear fusion?

Back

During nuclear fusion, protons combine together to form a heavier nucleus, releasing energy in the process.

Front

What is the primary process that generates energy in the sun?

Back

The primary process that generates energy in the sun is nuclear fusion, where hydrogen nuclei fuse to form helium.

Front

What is a renewable energy source?

Back

A renewable energy source is one that can be replenished naturally over time, such as solar power, wind energy, and hydroelectric power.

Front

What is electromagnetic radiation?

Back

Electromagnetic radiation is a form of energy that travels through space at the speed of light, including visible light, radio waves, and X-rays.

Front

What is the cosmic microwave background?

Back

The cosmic microwave background is the afterglow radiation from the Big Bang, filling the universe and providing evidence for the Big Bang theory.

Front

What is the difference between fusion and fission?

Back

Fusion is the process of combining lighter atomic nuclei to form a heavier nucleus, while fission is the splitting of a heavy nucleus into lighter nuclei.

Front

What is the role of kinetic energy in galaxies?

Back

Kinetic energy in galaxies is associated with the motion of stars and other celestial bodies, contributing to the overall dynamics and structure of the galaxy.

Front

What is solar power?

Back

Solar power is energy harnessed from the sun's rays, typically using solar panels to convert sunlight into electricity.