Week 1

Question 1

Where is our solar system located in relation to the universe and our galaxy system?

Answer 1

In the outer suburbs of the Milky Way galaxy

Question 2

Heliocentric model

Answer 2

Sun centred

Question 3

Geocentric model

Answer 3

Earth centred

Question 4

How old is the universe?

Answer 4

Approx 13.7billion years

Question 5

What is a light year?

Answer 5

Distance light travels in a year (speed of light x 1 year)

Question 6

Occam’s razor

Answer 6

Simplest possible explanation

Question 7

Dark energy

Answer 7

Not well understood, but is causing universe expansion to accelerate

Question 8

Dark matter

Answer 8

Matter with gravitational force that can’t be seen or detected. Most of the galaxies mass

Question 9

What is in motion in the universe

Answer 9

Everything

Question 10

Universe history (before atoms)

Answer 10

10-43, universe starts and is very hot and dense sea of energy. Over time the universe expands, causing temp and density to decrease.

Question 11

Universe history (after atoms)

Answer 11

Formation of atoms causes universe to go from charged to neutral, thus allowing photons to travel through space without interacting with electrons

Question 12

Scientific method

Answer 12

Theories that are simple, evidence-based, testable and natural

Question 13

Galileo

Answer 13

Invented scientific method, and discovered phases of Venus which provided evidence for a heliocentric universe, first to use telescopes for space.

Question 14

Kepler

Answer 14

Used Tycho’s measurements to determine orbits were elliptical, not circular

Question 15

Tycho

Answer 15

Recorded measurements and observations of space.

Question 16

Baryonic matter

Answer 16

all matter that is not dark matter or dark energy

Question 17

Before what time is modern physics unable to explain what was happening in the universe

Answer 17

10-43 seconds

Question 18

AU

Answer 18

ave distance between sun and earth, approx 1.5x10(8) km