LOPA
Which layer of Earth is liquid and generates the magnetic field?
Outercore
Which greenhouse gas is present in the greatest concentration in Earth’s atmosphere?
Water Vapor
What is the temperature at which water boils at sea level?
100°C
What is the name of the chemical reaction that produces heat and light in a fire?
Combustion
Which system in humans transports oxygen, nutrients, and waste throughout the body?
Circulatory system
What is the name of the supercontinent that broke apart, showing how the Earth's surface is always moving?
Pangea
What layer of the atmosphere contains most of the air we breathe?
Troposphere
Which process describes water moving from plants into the atmosphere?
Transpiration
What is the process called when fire spreads from one object to another without direct contact?
Radiation
What is the waxy layer on leaves that prevents water loss?
Cuticle
Which gas makes up the largest percentage of Earth’s atmosphere?
Nitrogen
18
Which form of water is found underground in spaces between soil and rocks?
Groundwater
Substances that slow down or prevent fire are called:
Extinguishers
Which process recycles nutrients from dead organisms back into the ecosystem?
Decomposition
What process drives the movement of tectonic plates beneath the Earth’s surface?
Convection currents in the mantle
What do we call the tiny solid and liquid particles suspended in the air?
Aerosols
What is the major source of freshwater on Earth?
Glaciers and ice caps
What is the main combustible material in paper and wood?
Cellulose
Which process describes the evolution of species over time?
Natural selection
Complete my birthday
September, _ _, 200x
18
As you climb a mountain, does the air become more or less dense?
Less dense
What is the process by which water changes from a liquid to a gas?
Evaporation
What is the visible, hot part of a fire called?
Flame
What part of a tree absorbs water and minerals from the soil?
Roots