Year 10.5 Mid Strand ESS Test Revision

Our solar system lies in our galaxy, the Milky Way. There may be 200 – 400 billion other main objects in the galaxy. What are these objects most likely to be?

• Planets

• Moons

• Galaxies

• Stars

A galaxy is best described as:

• a group or cluster of stars that moves in space.

• a group or cluster of stars that makes a pattern in the sky when viewed from Earth.

• a swirling mass of gravity.

• a swirling cluster of planets.

On a very clear night it is quite obvious that all the stars seem to be in a long group across the sky.  This is the Milky Way, which is:

• an elliptical galaxy consisting of old stars.

• an elliptical galaxy consisting of young stars.

• a constellation.

• a spiral galaxy composed of young and old stars.

A light year is a measurement based on the:

• speed of light hitting a planet.

• distance that light travels in one year.

• time it takes sunlight to reach the Earth.

• speed of reflected sunlight.

The universe includes:

• all matter known to exist.

• all the space that exists.

• nearly 200 billion galaxies.

• 200 billion galaxies AND all the matter & space known to exist

What do we call a cluster of stars, dust, gas and matter?

• A planet

• A star system

• A planetary system

• A galaxy

What units do scientists use to measure the distance between galaxies?

• Kilometers

• Billiometers

• Light Years

• Sound Years

What is the name of the scientific theory that explains how the universe was created?

• The Balloon Theory

• The Big Bang Theory

• The Big Explosion Theory

• The Implosion Theory

Knowledge of the structure of the atom is one of the basic pieces of information we need before we can understand the universe. Which is the best description of an atom?

• Electrons orbiting a nucleus of protons and neutrons

• Electrons moving at the speed of light from atom to atom

• Protons, neutrons and electrons in a tight ball

• Protons, neutrons and electrons orbiting around each other

Which of the following is NOT used in the study of astronomy?

• Optical telescope

• Radio telescope

• Spectrometer

• Radio microscope