Atmospheric pressure.. Introduction All objects on Earth are affected by the force of atmospheric pressure. The force of atmospheric pressure is created.

Slides:

Advertisements

Similar presentations

Under Pressure. What is Pressure?  Pressure (P) is defined as the amount of force (F) applied per unit area (A) or as the ratio of force to area: P=

Advertisements

The Air Around You Section 15:1.

Air Pressure Can you feel it?.

AIR PRESSURE Keeping an Atmosphere Atmosphere is kept by the world’s gravity –Low mass (small) worlds= low gravity =almost no atm. –High mass (large)

Air Pressure - #1 element of weather prediction.

What is barometric pressure?

Weather—The Atmosphere Weather is the condition of Earth’s atmosphere at a particular time and place. Weather is the condition of Earth’s atmosphere at.

Bell Ringer Be sure to put the date on the outside of the page! Copy down the question below and answer it. 1.What is the composition of air?

Aim: What is air pressure?

The Atmosphere.

The Air Around You. Earth’s Atmosphere Earth’s atmosphere is the envelope of gasses that surround the planet. Nitrogen makes up 78% of our air Oxygen.

Chapter 12 Section 2 AIR Pressure.

Air Pressure 5.4.

Diagram Explanation: Written Explanation: Can Demonstration.

Air Pressure 5.4 Ms. De Los Rios 6 th Grade Weather Factors.

Air Pressure Chapter 1, Section 2, p Properties of Air Air has mass – Air is made of atoms & molecules – Atoms & molecules have mass How can you.

AIR PRESSURE Keeping an Atmosphere Atmosphere is kept by the world’s gravity –Low mass (small) worlds= low gravity =almost no atm. –High mass (large)

Water and Weather Chapter Five: Earth’s Atmosphere 5.1 The Atmosphere 5.2 Layers of the Atmosphere 5.3 Earth is Just Right.

Atmosphere and Air Temp. Vocabulary Insolation – the amount of the Sun’s energy that reaches the Earth at any given time Atmosphere – the blanket of gases.

Section 1: Characteristics of the Atmosphere Objectives: Describe the composition of Earth’s atmosphere. Explain how two types of barometers work. Identify.

 Air Pressure – the weight of the gases in the atmosphere pushing on the surface of the Earth.

The Atmosphere Chapter 15 Section1. Composition of the Atmosphere The most abundant gas in the atmosphere that we breathe is Nitrogen 78% Nitrogen The.

Air Pressure and Wind. What is air pressure? The force exerted by air molecules as they collide with a surface The weight of the atmosphere as it pushes.

TOPIC 7. What is weather? Weather is the state or condition of the variables of the atmosphere at any given location for a short period of time.

Air Temperature, Pressure, and Density

Air Pressure. Does Air Have Mass?  Air consists of atoms and molecules, which have mass.  Because air has mass, it also has other properties, including.

Air Pressure  The atmosphere is a blanket of gasses around the planet.  The 4 main ways the atmosphere helps us: 1. Provides Oxygen 2. Blocks Harmful.

13.1 Describing the Properties of Gases

Chapter 6 Air Pressure. Gale Force Winds Create Waves that Batter Coast in UK in 2002.

Fluid Pressure. 1. The atmosphere is a thin layer of gasses that surrounds Earth, and held in place by gravity.

Air Pressure Air has mass, density, and pressure. Density Density- amount of mass in a given volume of air D= Mass Volume More molecules in a given volume.

How do people with arthritis know when it’s going to rain?

15.2 Air Pressure Key Concepts: What are some of the properties of air? What instruments are used to measure air pressure? How does increasing altitude.

Weather! Coulter. Air pressure 0 Because air has mass, it also has other properties, including density and pressure. 0 Density=mass/volume 0 Pressure-

1 ATMOSPHERIC PRESSURE & DENSITY. 2 The denser the atmosphere…  the greater its weight, and  the greater its air pressure.

The Earth is surrounded by a thin blanket of air called the atmosphere.

Journal # 19 The layer of gases that surrounds the earth is called the ___________. Nitrogen makes up about __% of the atmosphere. Oxygen makes up about.

ATMOSPHERE NERD WORDS. ATMOSPHERE Defintion: The envelope of gases that surrounds the planet. Example: Earth’s atmosphere is a thin layer of gases on.

Air pressure is the pressure exerted by the weight of air above Exerted in all directions (up, down, and sideways) The air pressure pushing down on.

Air Pressure Notes. Properties of Air Oxygen (O 2 ) Nitrogen (N 2 ) CO 2, H 2 O, and others.

The Air Around You Section 15:1.

Weather Lesson Two Pressure and Wind.

Air Pressure Notes.

Air Pressure Can you feel it?.

Introduction to Pressure

Atmosphere Review Quick Review.

Air Pressure Notes.

Aim: How does atmospheric pressure predict the weather?

Does air have mass?.

Air Pressure Notes.

Air Pressure Can you feel it?.

Air has weight. You might not be able to see it, but it is everywhere

Air Pressure Notes.

Air Pressure Can you feel it?.

Water and Weather. Water and Weather Chapter Five: Earth’s Atmosphere 5.1 The Atmosphere 5.2 Layers of the Atmosphere 5.3 Earth is Just Right.

Aim: How can we explain air pressure?

Air Pressure and Wind Pages

Air Pressure Can you feel it?.

Chapter 1.2 Air Pressure pgs 10-14

Air Pressure The atmosphere is a blanket of gasses around the planet.

Gases Boyle’s Law.

Air Pressure Can you feel it?.

Presentation transcript:

Atmospheric pressure.

Introduction All objects on Earth are affected by the force of atmospheric pressure. The force of atmospheric pressure is created by the weight of air. Air is not the name of a chemical element or gas. Air is a non-scientific term for a mixture of many different gases. The atmosphere is a layer of different gases surrounding our planet. Even though air seems weightless, it does have a weight. The Earth's atmosphere is about 500 kilometres deep. That is a lot of air! This air pushes down, with its weight, everything on Earth, creating atmospheric pressure.

What is Atmospheric Pressure ? Atmospheric pressure is the pressure exerted by the weight of air in the atmosphere of Earth (or that of another planet). OR Atmospheric pressure is defined as the force per unit area exerted against a surface by the weight of the air above that surface. How is it measured ? It is measured with a barometer,in barometer the level of mercury rises or falls as the weight of atmosphere changes.

What is the unit used to measure it? An atmosphere is the unit of measurement equl to the average air pressure at sea level at a temperature of 15 degree celsius. One atmosphere is equal to millibars. In aviation and television weather reports, pressure is given in inches of mercury ("Hg), while meteorologists use millibars (mb), the unit of pressure found on weather maps

How does the decrease in atmospheric pressure affect us? As the atmospheric pressure decreases,the amount of oxygen available to breathe also decreases.so at high altitudes as at.pressure decreases the people can becme sick and can die also. Mountain climbers use bottled oxygen when they ascend high peaks. Moving quickly from higher to lower pressure can cause ‘decompression sickness’ (or the bends ‘)

Can atmospheric pressure indicate weather ? When a low pressure area moves into an area,it usually leads to cloudiness,wind and precipitation. high pressure systems usually lead to fair calm weather.