IB Earth & Space Science Unit 2 review

Question 1

Why do astronauts float in the space shuttle?

Accepted Answer

They're in free fall around Earth's orbit

Question 2

The surface temperature of a star can be determined by its _________?

Accepted Answer

Color

Question 3

What is the force responsible for the contraction of the gas cloud that gave birth to the sun?

Accepted Answer

Gravity

Question 4

How many main sequence stars will become Neutron Stars?

Accepted Answer

Less than 3%

Question 5

Stars spend a majority of their lives as _______.

Accepted Answer

Main sequence stars

Question 6

What is the hottest and dimmest star?

Accepted Answer

White dwarf

Question 7

What is 620,002,000,000,000,000,000.00 in Scientific Notation?

Accepted Answer

6.20002 x 1020

Question 8

The color of the DIMMEST stars on the HR diagram is ______.

Accepted Answer

Red

Question 9

Which of the following does NOT perform fusion?

Accepted Answer

White dwarf

Question 10

If the halflife is 20 years, how long does it take for a 1000g sample of zinc to decay to 125g?

Accepted Answer

60 years

Question 11

What are the competing forces that maintain balance and stability inside of a star?

Accepted Answer

Thermal pressure and Gravity

Question 12

Which is the correct order of stellar evolution?

Accepted Answer

Protostar, main sequence, red giant, planetary nebula, dwarf

Question 13

The factor that affects a star's Luminosity the most is its ______.

Accepted Answer

Size

Question 14

Red Giant stars develop after ________?

Accepted Answer

All of a star's Hydrogen has been fused.

Question 15

Which list shows the units of distance in order from smallest to largest?

Accepted Answer

millimeter, centimeter, meter, kilometer

Question 16

The halflife of Zinc-22 is 2.4 minutes. How much of a 400 g sample would remain at 9.6 minutes?

Accepted Answer

25

Question 17

What is 2.3 x 1017 in standard format?

Accepted Answer

230,000,000,000,000,000

Question 18

How many years old is our Sun?

Accepted Answer

4.7 Billion

Question 19

What is the surface of a black hole called?

Accepted Answer

The event horizon

Question 20

Which order is correct from SMALLEST to LARGEST?

Accepted Answer

Solar System, Galaxy, Universe

Question 21

According to scientists, the Sun will become a red giant in approximately how many years?

Accepted Answer

5 billion

Question 22

The Sun's immense energy output comes from the fusing of ________ in the core.

Accepted Answer

Hydrogen into Helium

Question 23

Which elements does the unknown sample consist of?

Accepted Answer

H & He

Question 24

The Big Bang theory was first supported by which discovery?

Accepted Answer

The redshift of most observable stars by Hubble

Question 25

Which of these would appear to the observer as more red?

Accepted Answer

B

Question 26

What is a supernova?

Accepted Answer

A massive explosion caused by the end of a super giant

Question 27

What is the unit of measurement we use to measure the size of stars?

Accepted Answer

Solar masses

Question 28

Which of these is moving the fastest?

Accepted Answer

Betelguese

Question 29

Using the graph, the age of a bone discovered to have 25% of radioactive material would be__?

Accepted Answer

10,000 years

Question 30

This can form after a blue super giant star can no longer continue fusion in the core.

Accepted Answer

Black hole

Question 31

The Sun is like ____% of other stars in the universe.

Accepted Answer

97%

Question 32

On the Hertzsprung-Russell Diagram, temperature is _______.

Accepted Answer

Displayed along the X-axis and goes from hottest to coldest

Question 33

Our Sun is what kind of star?

Accepted Answer

A main sequence star

Question 34

Which stars are the hottest and brightest?

Accepted Answer

Blue Main Sequence

Question 35

About how many solar masses is our sun?

Accepted Answer

1

IB Earth & Space Science Unit 2 review

Questions 35

IB Earth & Space Science Unit 2 review

Questions 35