Unit 3 ( The universe and the solar system)

What was the most common elements in the early universe?

• Helium

• Hydrogen

• Gold

• Iron

The scientist who found the modern theory about the evolution of the solar system is ……..

• chamberlain

• Moulten

• Alfred Hale

• Laplace.

In modern theory , bombing the star nucleus away was due to ………………..

• the force of gravity

• collision by asteroids.

• drop in temperature .

• huge nuclear reactions.

The sun was born after ……………… million years of the Big Bang.

• 2000

• 3000

• 10000

• 15000

As a nebula contracts to form a star, what happens to the thermal energy of the nebula?

• It stays the same.

• it decreases

• It increases.

As a nebula contracts to form a star, what happens to the kinetic energy of the particles in it?

• It stays the same.

• it decreases

• It increases.

Which of the following best describes the shape of the Milky Way?

• A spiral

• A circle

• A sphere

Complete the following sentence: A telescope makes distant objects appear

• smaller

• larger

• brighter

Complete the following sentence: The solar system .....................

• orbits another star system

• orbits the center of the galaxy

• does not orbit anything

The Hubble telescope was launched in April in................

• 1905

• 1990

• 1995

• 1959