Study Guide
Quick meanings for every word. Pair Tier 3 words with pictures to support newcomers.
Beginner ELL Core Idea
- Air surrounds Earth and changes.
- Air pushes and moves.
- Heat makes air rise. Cool air falls.
- Weather happens in the troposphere.
| Word | Meaning |
|---|---|
| Air Pressure | Air pressure is air pushing on things. |
| Atmosphere | The atmosphere is the air around Earth. |
| Gas | Gas is air. Gas spreads out. |
| Gravity | Gravity pulls things down to Earth. |
| Pressure | Pressure is a push. Air can push. |
| Temperature | Temperature tells how hot or cold something is. |
| Weather | Weather is what the air is like today. Rain, sun, wind, or snow. |
| Altitude | Altitude is how high something is in the sky. |
| Barometer | A barometer measures air pressure. |
| Biosphere | The biosphere is all living things on Earth. |
| Chemical Composition | Chemical composition means what something is made of. |
| Density | Density means how packed something is. More packed = heavier. |
| Exosphere | The exosphere is the outer layer of air. |
| Greenhouse | A greenhouse traps heat. Gases in the air trap heat. |
| Hydrosphere | The hydrosphere is all the water on Earth. |
| Ionosphere | The ionosphere is a layer of air with charged particles. |
| Lithosphere | The lithosphere is the land part of Earth. |
| Mesopause | The mesopause is the top of the mesosphere. |
| Mesosphere | The mesosphere is a cold air layer above the stratosphere. |
| Ozone | Ozone is a gas that blocks harmful sunlight. |
| Stratopause | The stratopause is the top of the stratosphere. |
| Stratosphere | The stratosphere is a layer above the troposphere. Planes fly here. |
| Troposphere | The troposphere is the lowest air layer. Weather happens here. |
| Thermosphere | The thermosphere is a very hot air layer. |
| Tropopause | The tropopause is the top of the troposphere. |
| Variations | Variations mean changes or differences. |
| Water Vapor | Water vapor is water in gas form. |