Questions: Complete these sentences by matching the phrases below. Scientists smash together tiny bits of matter using: Scientists extrapolate backwards in time to derive: When light waves are emitted by a moving source, scientists can measure: The extremely low temperature of outer space can be explained as:

Complete these sentences by matching the phrases below.

Scientists smash together tiny bits of matter using:

Scientists extrapolate backwards in time to derive:

When light waves are emitted by a moving source, scientists can measure:

The extremely low temperature of outer space can be explained as:
Transcript text: Complete these sentences by matching the phrases below. Scientists smash together tiny bits of matter using: Scientists extrapolate backwards in time to derive: When light waves are emitted by a moving source, scientists can measure: The extremely low temperature of outer space can be explained as:
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Solution

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Solution Steps

Step 1: Understanding the Context

The task is to complete sentences by matching them with appropriate scientific concepts or phenomena. Each sentence relates to a different area of physics or cosmology.

Step 2: Analyzing Each Sentence
  1. Scientists smash together tiny bits of matter using: This refers to particle accelerators, which are used to collide particles at high speeds to study fundamental forces and particles.

  2. Scientists extrapolate backwards in time to derive: This is related to the Big Bang theory, where scientists use current observations to infer the conditions of the early universe.

  3. When light waves are emitted by a moving source, scientists can measure: This describes the Doppler effect, which is the change in frequency or wavelength of light from a moving source.

  4. The extremely low temperature of outer space can be explained as: This is related to the cosmic microwave background radiation, which is the thermal radiation left over from the Big Bang.

Step 3: Matching Phrases to Sentences
  • Particle accelerators are used to smash together tiny bits of matter.
  • The Big Bang theory is derived by extrapolating backwards in time.
  • The Doppler effect is measured when light waves are emitted by a moving source.
  • Cosmic microwave background radiation explains the extremely low temperature of outer space.

Final Answer

  • Scientists smash together tiny bits of matter using: \(\boxed{\text{Particle accelerators}}\)
  • Scientists extrapolate backwards in time to derive: \(\boxed{\text{The Big Bang theory}}\)
  • When light waves are emitted by a moving source, scientists can measure: \(\boxed{\text{The Doppler effect}}\)
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