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Lesson 1 And 2

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

Earth’s atmosphere is composed of?

Back (Answer)

78% nitrogen 21% oxygen Carbon dioxide Water vapor

#2
Front (Question)

Earth has a _______ core

Back (Answer)

Molten nickel-iron core

#3
Front (Question)

4 Earth structure

Back (Answer)

Inner core Outer core Mantle Crust

#4
Front (Question)

Solid, made of iron and nickel

Back (Answer)

Inner core

#5
Front (Question)

Molten metal. Responsible for the magnetic field

Back (Answer)

Outer core

#6
Front (Question)

Semi-solid rock, drives plate tectonics

Back (Answer)

Mantle

#7
Front (Question)

Solid outer layer where life exists

Back (Answer)

Crust

#8
Front (Question)

Form mountains, cause earthquakes, and help recycle nutrients on earth’s surface

Back (Answer)

Plate tectonics

#9
Front (Question)

Deflects solar wind and radiation

Back (Answer)

Magnetic field

#10
Front (Question)

Blocks ultraviolet rays

Back (Answer)

Ozone layer

#11
Front (Question)

Process where certain gases in the atmosphere traps heat from the sun, warming the earth just right

Back (Answer)

Greenhouse effect

#12
Front (Question)

Traps heat, shields against radiation, and burns up small meteorites

Back (Answer)

Atmosphere

#13
Front (Question)

Earth surface is about ___% water

Back (Answer)

70% water

#14
Front (Question)

Is essential for transporting chemicals within and between cells

Back (Answer)

Water

#15
Front (Question)

Geological and Chemical cycles (3)

Back (Answer)

Carbon cycle Nitrogen cycle Water cycle

#16
Front (Question)

Earth formed about ____ years ago

Back (Answer)

4.5 billion years ago

#17
Front (Question)

Life in earth began around _______ years ago

Back (Answer)

3.7 - 4 billion years ago

#18
Front (Question)

Life may have started in the ocean, particularly near ______

Back (Answer)

Hydrothermal vents

#19
Front (Question)

Refers to the interdependent or interrelated objects comprising and functioning as a whole

Back (Answer)

System

#20
Front (Question)

A system in which sets of interconnected components interact to form a unified whole

Back (Answer)

Earth as a system

#21
Front (Question)

The amount of matter within a closed system is _____

Back (Answer)

Fixed

#22
Front (Question)

The quantity of water on earth remains ______

Back (Answer)

Constant

#23
Front (Question)

4 earth’s subsystem:

Back (Answer)

Atmosphere Geosphere Hydrosphere Biosphere

#24
Front (Question)

Earth subsystem is also called

Back (Answer)

Spheres