Question

directions: determine whether the italicized term makes each statement true or false. if the statement is true, write true in the blank. if the statement is false, write in the blank the term or terms that make the statement true.

1. the steady state theory is the currently accepted theory of the orgin of the universe.
2. the existence of dark energy is detected by its gravitational effect on ordinary matter.
3. the existence of dark matter is used to explain the acceleration of distant galaxies.
4. if a star is moving away from earth, the color of the light from the star shifts towards the blue part of the spectrum.
5. the doppler effect is used to measure the speed of galaxies.

Explanation:

Question 10

The steady - state theory is not the currently accepted theory for the origin of the universe. The Big Bang theory is the currently widely accepted theory for the origin of the universe. So the statement is false, and the correct term to replace "steady state theory" is "Big Bang theory".

Dark energy's existence is detected by its effect on the expansion of the universe (the accelerating expansion), not by its gravitational effect on ordinary matter. So the statement is false, and the correct phrase to replace "gravitational effect on ordinary matter" is "effect on the expansion of the universe (or accelerating expansion - related effect)".

Dark matter is used to explain the rotational speeds of galaxies (the flat rotation curves of galaxies), not the acceleration of distant galaxies. The acceleration of distant galaxies is related to dark energy. So the statement is false, and the correct phrase to replace "acceleration of distant galaxies" is "rotational speeds of galaxies (or flat rotation curves of galaxies)".

Answer:

false; Big Bang theory

Question 11