Physics Exam 2

Question 1

What is the refraction of light

Answer 1

Absorption of light/ dense transverse

Question 2

Which type of telescope uses a lender as a main obstacle elements

Answer 2

Refracting telescope

Question 3

Light gathering power of a telescope is related directly to the

Answer 3

primary Mirror or lens

Question 4

A typical reflecting telescope is made up of

Answer 4

A long focal length front /short focal length rear

Question 5

What happens when he being white light is passed through a prism of glass

Answer 5

Different colors / different angles to produce a spectrum

Question 6

When white light passes through a prism which wavelength of light or deflected most by the glass

Answer 6

Shorter wavelengths

Question 7

A Newtonian telescope consist of which of the following combination of optical elements

Answer 7

concave /one flat mirror

Question 8

One major difference between radio waves and light is that

Answer 8

Radio waves have a shorter wavelength

Question 9

How does angular resolutions for giving diameter of telescope depend on wavelength

Answer 9

Resolution worsens as wavelength increases

Question 10

Main reason for combining many radio telescopes together into a interferometer with large distance between telescopes

Answer 10

sharper image /sources

Question 11

Two ranges of electromagnetic

Answer 11

Visible and radio

Question 12

What range of wavelengths does the Hubble space telescope operate

Answer 12

Infrared, visible & ultraviolet

Question 13

High-energy telescope to take the radiation at the high energy and of the electromagnetic spectrum namely

Answer 13

X-rays & gamma rays

Question 14

And electromagnetic wave has a wave of 80 cm

Answer 14

Radio Wave

Question 15

How many stars are in our solar system

Answer 15

1

Question 16

The overall shape of the orbit

Answer 16

Slightly elliptical but nearly circular

Question 17

Best way to measure the mass of the planet is to measure

Answer 17

Size & rotational speed

Question 18

The mean density of a planet is

Answer 18

mass divided by volume

Question 19

Which planet does not have natural satellites

Answer 19

Venus & Mercury

Question 20

The astroid belt exist between the orbits of which planets

Answer 20

Mars & Jupiter

Question 21

Pluto is classified as a

Answer 21

Minor planet

Question 22

The most common elements in the universe are

Answer 22

Equal hydrogen and helium / small amounts of heavier elements

Question 23

Hydrogen and helium account for

Answer 23

98%

Question 24

Which following Chemical elements is relatively rare

Answer 24

Gold

Question 25

Our solar system seems to have formed about how long ago

Answer 25

5 billion years

Question 26

When dealing with radioactive decay of materials we often read about the age of a particular rock

Answer 26

age of Atoms within the rock

Question 27

Radioactive decay in Atom occurs because the

Answer 27

unstable nucleus by exposure to the nuclear reactions

Question 28

What was the form of the material from which the solar system formed

Answer 28

A nebula made mostly of hydrogen and helium gas ( supernova explosions)

Question 29

Most probable theory for the solar systems formation

Answer 29

Gas and dust clouds condensed to form the sun / formed later within a nebular disc

Question 30

Material that has the highest condensation temperature

Answer 30

Rocks & dust grains

Question 31

Formation of terrestrial type planets around a star

Answer 31

Accretion or slow accumulation of smaller particles by mutual gravitational attraction

Question 32

Process of chemical differentiation

Answer 32

The sinking of heavy material to the center of a planet

Question 33

How many of the satellites of the Jovian planets have formed

Answer 33

From a disc of material around the planet

Question 34

What is the Oort cloud

Answer 34

A Spherical solar system halo of icy objects

Question 35

Is not a technique used to discover exoplanets

Answer 35

Ultraviolet excess

Question 36

Earth is the only planet who's atmosphere contains a significant amount of

Answer 36

Oxygen

Question 37

The albedo of the planet is a fraction of energy that is

Answer 37

Reflected by the whole planet including atmosphere and surface

Question 38

The basic structure of earths interior

Answer 38

Solid inner core, molten iron outer core, Rocky mantle , and lighter Rocky crust

Question 39

The composition of Earth's core

Answer 39

Pure iron

Question 40

Upper layers of the mantle or plastic

Answer 40

Because the continents are able to flow and drift

Question 41

The name Pangaea refers to

Answer 41

Supercontinent that split into the north and south America Europe and Africa

Question 42

The average speed of motion of the plates of earths surface is

Answer 42

A few centimeters per year

Question 43

On earth you would expect to find metamorphic rocks where

Answer 43

boundaries of colliding tectonic plates

Question 44

Earths magnetosphere is

Answer 44

beyond the atmosphere with a magnetic field protects us

Question 45

Van Allen belts are

Answer 45

Regions of high energy charged particles trapped

Question 46

Aurora on Northern and Southern lights are caused by

Answer 46

Charge particles from magnetosphere

Question 47

Photosynthesis is a chemical process that takes place in a greenhouse what is the effect of our atmosphere

Answer 47

It consumes carbon dioxide from our atmosphere and produces oxygen

Question 48

Which is the most abundant gas

Answer 48

Nitrogen

Question 49

The basic structure of earths atmosphere

Answer 49

Four layers of alternating temperature profiles

Question 50

The greenhouse effect is

Answer 50

Absorption by atmospheric gases of infrared radiation

Question 51

We need to ozone layer because it

Answer 51

Shield us from harmful solar ultraviolets radiation

Question 52

Earths biosphere includes

Answer 52

The troposphere, stratosphere in everything down to 1 km

Question 53

Lowest pressure in earths atmosphere occurs when

Answer 53

The boundary of upper troposphere with the stratosphere

Question 54

The diameter of the moon is

Answer 54

One fourth

Question 55

In its orbit Around the earth the moon

Answer 55

Always keep the same side towards earth

Question 56

The moon has

Answer 56

No measurable atmosphere or liquid water

Question 57

Most of the craters on the moon were formed by

Answer 57

Bombardment by interplanetary you

Question 58

Maria are

Answer 58

Large impact craters and filled by lava

Question 59

What is Scarp

Answer 59

A long wall when the moon surface cold and shrink

Question 60

What can we say about the moons magnetic field

Answer 60

Has iron rich core that is partly Molten

Question 61

The primary cause of moonquakes

Answer 61

Title forces due to gravitational pull of the earth

Question 62

The age of the moon rocks has been determined by

Answer 62

Measurements of radioactive decay products

Question 63

What will most likely be the fate of the footprints that the astronaut left on the moon

Answer 63

obliterated by micrometeorite impacts

Question 64

Most of the craters on the moon were formed by

Answer 64

Rocky debris during the first billion years of the moons history

Question 65

What effect of the ocean waters title drag on earth is

Answer 65

It slows down earths spin rate

Question 66

The speed of light and glass is

Answer 66

Less