Q1T3: The Sun's Radiative Power

Question 1

How old is the sun?

Answer 1

4.5 billion years old

Question 2

What reaction is occurring in the sun’s core?

Answer 2

Fusion of hydrogen into helium

Question 3

How much of the entire solar system’s mass is contained in the sun alone?

Answer 3

99.8%

Question 4

What is true about the sun’s temperature?

Answer 4

The core is hotter then the surface

Question 5

Which of the following is NOT true about the sun?

a. It is considered a ball of gases; mainly hydrogen and helium
b. It is considered to be at its midlife or midway through the star life cycle
c. It is larger than the other star in our solar system, Rigel

Answer 5

C

Question 6

Where nuclear fusion occurs?

Answer 6

Core

Question 7

The visible layer that can be seen from earth.

Answer 7

Chromosphere

Question 8

The sometimes visible (like during a solar eclipse) layer of the sun that gives off tremendous heat

Answer 8

Corona

Question 9

A region of very tightly packed gas where energy is transformed mainly in the form of electromagnetic radiation

Answer 9

Radiative

Question 10

The outermost layer of the sun’s interior. Cooler gases sink, forming loops of gas that move heat toward the sun’s surface.

Answer 10

Convective

Question 11

True or fals: the sun’s core is hotter than the surface which is hotter than the corona

Answer 11

False

Question 12

Eruptions that occur when the loops in sunspot regions suddenly connect to each other

Answer 12

Solar flare

Question 13

The sun’s atmosphere layer that gives if visible light

Answer 13

Photosphere

Question 14

The sun’s atmosphere layer that has a reddish glow

Answer 14

Chromosphere

Question 15

Areas of gas on the sun’s surface that are cooler than the gasses around them

Answer 15

Sunspot

Question 16

The layer of the sun’s atmosphere that looks like a halo and can be seen during an eclipse

Answer 16

Corona

Question 17

The joining of hydrogen atoms to form helium

Answer 17

Nuclear fusion

Question 18

The center most layer of the sun

Answer 18

Core

Question 19

Reddish loops of gas that link parts of the sunspot regions

Answer 19

Prominences

Question 20

The layer of the sun’s interior where energy is transferred mainly by electromagnetic radiation

Answer 20

Radiation zone

Question 21

The outermost layer of the sun’s interior

Answer 21

Convection

Question 22

What particle is needed to begin a nuclear chain reaction

Answer 22

Neutron

Question 23

What type of nuclear energy is used to produce electrical energy

Answer 23

Nuclear fission

Question 24

What is it called when two atomic nuclei are combined

Answer 24

Nuclear fusion

Question 25

The following are types of radioactivity. Which of the following is not one of them?

a. alpha
b. beta
c. gamma
d. Delta

Answer 25

D

Question 26

Which of the following particles could not pass right through a piece of paper?

a. alpha
b. beta
c. gamma
d. Delta

Answer 26

A

Question 27

The smaller number in an elements box on the periodic table list that element’s

Answer 27

Atomic number

Question 28

The smaller number in an elements box on the periodic table also Tells you that elements

Answer 28

Number of protons

Question 29

This is the amount of time it takes for half of a radioactive material to decay

Answer 29

Half life

Question 30

An isotope has the same number of _______, but different numbers of _____

Answer 30

Protons

Neutrons

Question 31

Which type of radioactive decay doesn’t change the atomic number or the atomic mass because it does not release any particles but merely a wave of energy and can penetrate materials quite deeply

Answer 31

Gamma

Question 32

What is emitted during alpha decay

Answer 32

Two protons and two neutrons from the nucleus

Question 33

A radioactive isotope has a half- life of 2 years. At the end of two years, how much of a 300g sample would remain?

Answer 33

150g

Question 34

A radioactive isotope has a half-life of 2 years. How much of a 400g sample remains after 4 years

Answer 34

100g

Question 35

The radioactive isotope Z has a half-life of 12 hours. After 2 days the fraction of the original amount remaining is

Answer 35

1/16

Question 36

How much of the sample remains when 70 hours have passed

Answer 36

0.1

Question 37

How much remains after 2 half lives have passed

Answer 37

0.25

Question 38

The half life of a cobalt- 60 is 5 years. If u have 10g of cobalt-60, how much do u have after 15 years

Answer 38

1.25 g

Question 39

Carbon-14 has a half- life of 5780 years. If you have 20g now, how long would it take for 3 half- lives to occur

Answer 39

17,340years

Question 40

Americium-242 has a half-life of 6 hours. If you started with 24g and you now have 3 g, how much time has passed

Answer 40

18 hours

Question 41

American-242 has a half- life of 6 hours. If you started with 24g and 3 hours have passed, how much do you have left

Answer 41

18 grams