The Beginning

Question 1

It includes all of space,and all the matter and energy that space contains

Answer 1

Universe

Question 2

is the leading explanation about
how the universe began.

Answer 2

The Big Bang Theory

Question 3

The universe began about

Answer 3

13.8 billion years ago.

Question 4

is the galaxy in which Earth resides.

Answer 4

The Milky Way galaxy

Question 5

is a large group of stars, gas, and dust bound together by gravity.

Answer 5

A Galaxy

Question 6

is the distance light travels in one Earth year. Galaxies are immensely large, and the distances between them are vast.

Answer 6

Light-year

Question 7

are two among many hundreds of billions of galaxies in the universe

Answer 7

The Milky Way and Andromeda galaxies

Question 8

is formed as a cloud of dust and gas inspace called a nebula

Answer 8

star

Question 9

Our solar system and everything in it. including Earth, is formed from the coalescence of dust and gas about ?

Answer 9

4.6 billion years ago

Question 10

is a giant cloud of dust and gas in space.

Answer 10

nebula

Question 11

is the second stage of a newborn star in a nebula.

Answer 11

protostar

Question 12

is made up of the sun and everything that orbits around it, including planets. moons, asteroids, comets and meteoroids.

Answer 12

solar system

Question 13

is closer approximation of the Earth’s true shape.

Answer 13

geoid

Question 14

• the line around which the Earth rotates, extending through the poles

Answer 14

Axis

Question 15

movement of the Earth around the Sun

Answer 15

Revolution

Question 16

THE STRUCTURE OF THE EARTH
Three major compositional layers of the Earth:

Answer 16

Core
Mantle
Crust

Question 17

a natural feature, such as a hill or valley, on the surface of Earth.

Answer 17

Landform

Question 18

MAJOR LANDFORM TYPE

Answer 18

Mountains
Plateau
Hills
Plains

Question 19

THE EARTH’S WATER

Answer 19

Seawater
Glacier
Groundwater
Fresh water

Question 20

A theory proposed by Alfred Wegener stating that continents move slowly

Answer 20

Continental Drift

Question 21

the hypothetical supercontinent, composed of all the present continents, that existed between 300 and 200 million years ago

Answer 21

Pangaea

Question 22

was the vast global ocean. that surrounded the supercontinent Pangaea, during the Late Paleozoic and the early Mesozoic eras.

Answer 22

Panthalassa (Greek, meaning ‘all sea’), also known as the Panthalassic Ocean

Question 23

is the water found underground in the cracks and spaces in soil, sand and rock.

Answer 23

Groundwater

Question 24

is a huge mass of ice that moves slowly over land.

Answer 24

Glacier

Question 25

is not salty, for instance water found in
lakes, streams, and rivers, but not the ocean

Answer 25

Freshwater

Question 26

is water from a sea or ocean.

Answer 26

Seawater

Question 27

are large, flat pieces of land with no drastic changes in elevation

Answer 27

Plains

Question 28

is an elevated piece of land that, unlike a mountain, is flat.

Answer 28

Plateau

Question 29

are elevated sections of land with notable
summits that are lower and less steep than
mountains.

Answer 29

Hills

Question 30

are large landforms that rise high above surrounding terrain and usually form sharp peaks

Answer 30

Mountains

Question 31

• Rock layer or shell of the Earth beneath the crust and surrounding the core. composed of ultramafic igneous rock of silicate
  mineral composition

Answer 31

Mantle

Question 32

-Outermost solid shell or layer of the Earth, - composed largely of silicate minerals

Answer 32

Crust

Question 33

consists of molten iron and nickel.

Answer 33

Outer Core

Question 34

consists of solid iron and nickel

Answer 34

Inner Core

Question 35

Spherical central mass of the Earth

Answer 35

Core