Science 6 Unit 6 Lesson 1 Practice Quiz 1

ion

electrically charged atom

ozone

form of oxygen having three atoms of oxygen making up the molecule (O3)

nitrogen (N)

Many people think the atmosphere is made mostly of oxygen, but the most abundant gas is actually ___________. It makes up about 78 percent of the gases in the atmosphere. The second most abundant gas is oxygen (O), which makes up about 21 percent. The remaining 1 percent is made of argon (Ar), carbon dioxide (CO2), water vapor, and other trace gases. ________________, oxygen, argon, and carbon dioxide are the primary gases in the atmosphere.

argon (Ar), carbon dioxide (CO2), water vapor and other trace gases

Many people think the atmosphere is made mostly of oxygen, but the most abundant gas is actually nitrogen (N). Nitrogen makes up about 78 percent of the gases in the atmosphere. The second most abundant gas is oxygen (O), which makes up about 21 percent. The remaining 1 percent is made of ____________ , _____________ ______________, ___________ ___________ and _____ ___________ ______________. Nitrogen, oxygen, argon, and carbon dioxide are the primary gases in the atmosphere.

increases as wavelength decreases

The EM spectrum lists radiation in order from lowest energy to highest. Energy __________ as wavelength __________.

atmosphere

The Earth is surrounded by a blanket of air called the ____________. The ___________ is made of many different gases. These gases remain around the planet because of the Earth's gravity. The gases at the bottom of the _____________ are compressed by the weight of the atmosphere. Fifty percent of the total mass of the __________ lies within 5.6 kilometers (3.5 miles) of the Earth's surface.

Spectrum

A broad range of related waves is called

sun

In addition to light and heat, the ______ also emits radio waves, X-rays, and microwaves.

plant growth

Nitrogen is important for

ultraviolent rays

Solar radiation also includes gamma-rays and ___________ _______.

ozone layer

The _________ _____________ acts as a shield to protect the Earth from most of the sun's ultraviolet rays.

ionosphere

The _____________ is important because without it, radio waves would not bound and deflect to travel around the world.

greenhouse effect

The trapping of heat by the Earth's atmosphere is called the __________________ ___________.

cell process

Without oxygen, animals would not be able to breathe. Oxygen in the air is taken in by animal lungs. It is used to make energy for ______ ______________. When animals exhale, they release carbon dioxide. This gas is used by plants to make food and oxygen through photosynthesis. The oxygen is released back into the air through holes in plant leaves.

Nitrogen, oxygen, argon and carbon dioxide

_________, __________, ________, and _____________ _______________ are the primary gases in the atmosphere.

Solar radiation

__________ ______________ is made of a broad range of energy frequencies.

nitrogen

__________ is very important for living organisms. It is removed from the air by special bacteria and precipitation. Once on the ground, it is absorbed by plant roots. The ___________ helps the plants grow. It is returned to the atmosphere by other bacteria.

ionosphere

layer of atmosphere containing ions; above the mesosphere.

thermosphere

layer of the atmosphere above the mesosphere where temperatures are the highest in the atmosphere

mesosphere

layer of the atmosphere just above the stratosphere

stratosphere

layer of the atmosphere just above the troposphere where the temperature remains fairly constant

troposphere

layer of the atmosphere nearest the Earth in which most weather changes occur

ozonosphere

region in the upper stratosphere where ozone is concentrated