Learning About the Universe - Savvas Lesson 2 Reading

The electromagnetic spectrum helps scientists learn about the universe by:

• allowing them to observe different types of energy emitted by celestial objects

• measuring only visible light from stars

• blocking harmful radiation from reaching Earth

• limiting the study of space to radio waves only

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Scientists use technology to learn about the universe by:

• using telescopes and spacecraft to observe space

• guessing based on ancient myths

• relying only on the naked eye

• ignoring evidence from experiments

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What is the meaning of the vocabulary word: electromagnetic radiation?

• Electromagnetic radiation is energy that can travel in the form of waves, such as light, radio waves, X-rays, and gamma rays.

• Electromagnetic radiation is a type of static electricity found in metals.

• Electromagnetic radiation is the process by which plants convert sunlight into food.

• Electromagnetic radiation is the movement of air molecules that creates sound waves.

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What is the meaning of the vocabulary word: visible light?

• Visible light is the type of electromagnetic radiation that can be seen by the human eye.

• Visible light is a type of sound wave that travels through water.

• Visible light is the energy produced by chemical reactions in plants.

• Visible light is the force that holds atoms together in a molecule.

What is the meaning of the vocabulary word: spectrum?

• A spectrum is a range of different colors with different wavelengths, such as the visible light spectrum.

• A spectrum is a type of musical instrument used in orchestras.

• A spectrum is a mathematical formula used to calculate speed.

• A spectrum is a kind of plant found in rainforests.

What is the meaning of the vocabulary word: wavelength?

• Wavelength is the distance between the crest of one wave and the crest of the next wave.

• Wavelength is the speed at which a wave travels through a medium.

• Wavelength is the height of a wave from its base to its crest.

• Wavelength is the amount of energy carried by a wave.

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What is the meaning of the vocabulary word: telescope?

• A telescope is an instrument used to observe distant objects by collecting electromagnetic radiation.

• A telescope is a device used to measure temperature.

• A telescope is a tool for mixing chemicals in a laboratory.

• A telescope is a machine used for digging holes in the ground.

What is the meaning of the vocabulary word: probe?

• A probe is an instrument or device sent into space to collect data and transmit it back to scientists on Earth.

• A probe is a type of protective suit worn by astronauts.

• A probe is a communication satellite used for television broadcasts.

• A probe is a fuel tank used to power rockets.

Refer to the image titled 'A Distant Galaxy - Figure 1'. What does this image show and what tool was used to capture it?

• The image shows the distant galaxy NGC 1512, and it was captured using NASA's Hubble Space Telescope.

• The image shows the Andromeda galaxy, and it was captured using the James Webb Space Telescope.

• The image shows the Milky Way galaxy, and it was captured using the Chandra X-ray Observatory.

• The image shows the Orion Nebula, and it was captured using the Spitzer Space Telescope.

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What do optical telescopes use to collect and focus visible light?

• Lenses and mirrors

• Only mirrors

• Only lenses

• Radio waves