Abeka Science G8/SR 7.1

Define atmosphere

• The layer of water surrounding the Earth
• The layer of fire surrounding the Earth
• The layer of rocks surrounding the Earth
• The blanket of gases surrounding the Earth

Why is the lower layer of the atmosphere called the homosphere?

• Because it is made up of only one type of gas
• Due to the presence of high levels of pollution
• It has a constant chemical composition and is composed of a nearly unchanging mixture of several gases

• Because it is the layer closest to the Earth's surface

What the most abundant gas in the atmosphere?

• Oxygen
• Nitrogen
• Carbon dioxide
• Helium

Which layer of the atmosphere is responsible for our weather?

• Mesosphere
• Exosphere
• Stratosphere
• Troposphere

Name three forms of UV radiation. Which one causes tanning and sunburns?

• UVA, UVC, Infrared
• UVA, UVB, UVC

  ;UVB

• Visible, Microwave, Radio
• X-ray, Gamma, Infrared

What is the name for the coolest point in the atmosphere?

• Stratosphere
• Mesosphere
• Tropopause
• Mesopause

Define ionosphere.

• The region of the thermosphere in which radiation causes the air to take the form of a plasma

• The layer of the Earth's atmosphere that is frozen solid
• The layer of the Earth's atmosphere that is made of pure oxygen
• The layer of the Earth's atmosphere that is filled with water vapor

What is a magnetic field?

• A type of energy produced by the Earth's core
• A type of force that repels objects
• A type of radiation emitted by the sun
• The region in which a magnet affects other objects

Describe the shape of the magnetosphere.

• • - away the sun - compressed by the earth's wind;

  - toward from the sun -stretched out like a hawks tail

• • - toward the sun - compressed by the earth's wind;

  - away from the sun -stretched out like a hawks tail

• • -away the sun - compressed by the solar wind;

  - toward from the sun -stretched out like a giant tail

• • - toward the sun - compressed by the solar wind;

  - away from the sun -stretched out like a giant tail

What is an aurora?

• A colorful phenomenon that occurs when solar wind particles collide when the ionosphere to produce light

• A type of tropical fruit
• A type of rock formation found in deserts
• A species of bird found in South America