Test #3

Question 1

A model atom has a ____ charged nucleus at the center?

Answer 1

positively.

(Protons carry a positive electrical charge and neutrons have no charge

Question 2

Isotopes!!! atoms have the same # of ____ but different # of ____.

Answer 2

• Protons

- different neutrons.

Question 3

Atom excitation.

Higher the temp.= the higher the ____.

Answer 3

Energy. and more common for collisions.

Question 4

TRUE OR FALSE?

Blue is hotter than red.

Answer 4

TRUE.

Question 5

HOTTEST=

COLDEST=

Answer 5

-O
-M
OBAFGKM

Question 6

an Ion is a ____ charged atom.

Answer 6

Negatively.

Question 7

Temperature is a measure of _____ energy.

Answer 7

kinetic

Question 8

Proton-Proton

Answer 8

SUN USES THIS. (90%)

-there’s series of 3 reactions that builds a helium gas by adding together protons.

Question 9

4 Hydrogen protons make 1 helium.

Answer 9

FUSION.

Question 10

Black body radiation shows on a ____graph?

Answer 10

Spectragraph

Question 11

measuring distance w/ parallax = what unit of distance?

Answer 11

Parsec (pc).

parallax of 1 second arc.

Question 12

H.R Diagram

Answer 12

Hertzprung-Russel diagram. SHOWS surface temp & surface area on luminosities.

Question 13

Eclipsing binary stars

Answer 13

Orbits of the 2 stars in an orbit around a larger star. First eclipsing the larger star them being eclipsed as it moves behind.

Question 14

Clouds are made of ___ and ____

Answer 14

Hydrogen and Helium

Question 15

Protostar

Answer 15

Doesn’t fuse Hydrogen into Helium in center. Begins to glow through black body radiation.

viewed through INFARED

Cool and faint.

Question 16

Important Trigger

Answer 16

When masses in a space, the space is getting changed.

Question 17

CNO cycle

Answer 17

Carbon Nitrogen Oxygen.

MAIN SEQUENCE STARS use this process for energy production

Question 18

Alpha particle has a ____ nucleus

Answer 18

helium.

Question 19

TRUE OR FALSE: Main sequence stars are stable stars

Answer 19

True

Question 20

Stability in star relies on ____ and ____ ____

Answer 20

Temperature and Gas Pressure.

Question 21

LAWS OF MASS AND ENERGY (3 laws)

Answer 21

1. Conservational mass= total mass is equal to the sum of the layers of mass.
2. Conservational energy= energy proceeds is the same from Layer to layer
3. Hydrostatic equlibrium
4. Energy transport

Question 22

Mass determines life time. If the star brighter it burns faster then ___

Answer 22

they die sooner

Question 23

TRUE OR FALSE: More mass= more energy needed to produce =short lifetime for larger stars

Answer 23

TRUE

Question 24

TRUE OR FALSE: Main sequence stars use nuclear fusion for energy

Answer 24

TRUE

Question 25

Planetary Nebulae

Answer 25

Outer layers kicked out from a medium-mass star.

Fusion Shell is so unstable they begin to flare- which pushed the atmosphere outward.

Question 26

Novae and the binary system

Answer 26

when there a system of a small star and a large star and the smaller steals the mass of the larger one

Question 27

Type I supernovae

Answer 27

• No hydrogen lines in their spectra
• CLASSIFICATION of 1a and 1b
• happens in binary system

1a= white dwarf has more than 1.4 solar masses it will collapse on itself. BRIGHTEST explosion. EVERYTHING IS DESTROYED.

1b.Enormous explosion. outer layers removed. LEAST COMMON.

Question 28

Type II supernovae

Answer 28

• Spectra containing hydrogen lines (because the star didn’t lose its atmosphere)
• explosion of a massive star.

Question 29

Jocelyn Bell 1967

Answer 29

SERIES OF REGULAR PULSES. (Pulsars)

Question 30

The greater the mass the ____er the evolution

Answer 30

faster

Question 31

Escape Velocity:

Answer 31

How much velocity needed for an object to leave celestial body (more mass higher escape velocity)

Question 32

need chapter 11-12

Answer 32

…