Luna is studying the layers of Earth's atmosphere for her science project. She notices that in some layers, the temperature drops as you go higher up. Based on the graph, in which two layers does the temperature decrease as altitude increases?

Arjun is studying the Earth's atmosphere using a graph that shows how temperature changes with altitude. He notices that in some layers, the temperature increases as you go higher. Based on the graph, in which two layers does the temperature increase as the altitude increases?

Zoe is fascinated by space and wants to learn more about where the International Space Station orbits Earth. She discovers that many satellites actually orbit Earth within a certain layer of the atmosphere. She also learns that variations in the amount of energy coming from the Sun exert a powerful influence on both the height of the top of this layer and the temperature within it. The aurora, the Northern Lights and Southern Lights, occur here. Another name for this layer is the “heat” layer. Which layer is Zoe learning about?

Abigail is reading about Earth's atmosphere for her science project. She learns that most meteors burn up in a certain layer. Unlike the stratosphere, temperatures in this layer grow colder as you rise. The coldest temperatures in Earth's atmosphere, about -90° C (-130° F), are found near the top of this layer. The air is far too thin to breathe; air pressure at the bottom of the layer is well below 1% of the pressure at sea level, and continues dropping as you go higher. Which layer is Abigail learning about?

Emma is studying about Earth's atmosphere for her science project. She learns that the "air" is very, very, very thin in one particular layer, making it even more space-like than the thermosphere. In fact, the air is constantly - though very gradually - "leaking" out of Earth's atmosphere into outer space. There is no clear-cut upper boundary in this layer. High Earth Orbit satellites can be found here. Which layer is Emma learning about?

Mia is curious about the layer of the atmosphere where humans live, and where nearly all weather occurs. She notices that most clouds appear here, and learns that 99% of the water vapor in the atmosphere is found in this layer. As Mia climbs a mountain, she observes that air pressure drops and temperatures get colder the higher she goes. Which layer is Mia exploring?

While hiking up a mountain, Noah notices that the air feels thinner the higher he climbs. The density of our atmosphere _______________ with an increase in altitude.

Lily is hiking up a mountain. She notices that the atmospheric pressure _________________ with ___________________ altitude.

Charlotte is learning about the air we breathe. She wonders what the atmosphere is composed of mainly. Can you help her find the answer?

Grace is learning about the atmosphere for her science project. She wants to know which layer of the atmosphere is the most dense. Which layer should she choose?

Aiden is planning a high-altitude balloon experiment and wants to know which layer of the atmosphere will be the coldest for his equipment. Which layer is the coldest?

Zoe is planning a trip to see the Northern Lights and wants to know in which layer of the atmosphere she should expect to find them.

William is curious about where most weather events, like rain and snow, take place in Earth's atmosphere. In which layer do these weather events mostly occur?

Ava is learning about the different layers of Earth's atmosphere in her science class. Her teacher mentions a layer known as the “heat layer” because temperatures rise significantly there. Which layer is Ava's teacher referring to?

Charlotte is learning about the Earth's atmosphere in her science class. She wants to know in which layer the Ozone layer is found.

Jackson is reading about how the Earth is protected from space objects. He wonders which layer of the atmosphere protects the earth from meteoroids. Which layer is it?

Grace is looking at a photo taken from space and notices a thin blue layer surrounding Earth. She wonders what this layer of gases is called. What is the layer of gases that surrounds Earth?

Nora is learning about the air we breathe in her science class. Her teacher tells her that one particular gas makes up 21% of our atmosphere. Which gas is it?

Rohan is learning about how Earth stays warm enough for people, plants, and animals to live. His teacher tells him about the Greenhouse Effect. How does the Greenhouse Effect protect life on Earth?

Kai is learning about how Earth is protected from the sun's harmful rays. He wonders which sphere blocks these rays. Which sphere is responsible for this protection?

Aria and her friends are playing outside and start wondering about the air they breathe. Aria asks, "What sphere do we live in?"

Mia is climbing to the top of a mountain and notices it is harder to breathe. Why is this?

Ava is curious about how the atmosphere helps keep everyone safe on Earth. She asks her teacher, "How does the atmosphere protect life on Earth?" What could her teacher say?

Hannah is learning about how the Earth is protected from the sun's harmful rays. She wonders which layer of gases blocks radiation from the sun. Which layer is it?

David notices that factories in his city are releasing a lot of pollution into the air. He wonders how this pollution might effect Earth's temperature. What is the impact?

Benjamin is curious about what would happen if Earth suddenly lost its atmosphere. What would Earth be like without an atmosphere?

Maya is working on a science project about Earth's atmosphere. She needs to identify the three gases present in the greatest concentration in our atmosphere. Which combination should she choose?

While watching a documentary about space, Sophia learns about the different layers of Earth's atmosphere. She wonders, which is the uppermost layer?

Benjamin is learning about the Earth's atmosphere in science class. He wonders why the thermosphere and exosphere are the warmest of the atmospheric layers. What is the reason?

Scarlett is curious about where rain, snow, and clouds form in the atmosphere. Using the figure, in which layer would she find these weather phenomena?

Ava notices droplets forming on the outside of her cold water bottle on a hot day. What is it called when water changes from gas to liquid?

Avery is curious about what powers most of the natural processes she observes on Earth's surface, like weather and plant growth. What is the major source of energy for the Earth's surface? 

Grace is hiking up a mountain. As she climbs higher, what happens to the air pressure?

Maya is learning about the layers of the atmosphere in her science class. She wants to know more about the Troposphere. Which two statements describe the Troposphere?

Kai is studying how temperature changes as you go higher in the atmosphere. He notices that some layers are warmer at lower altitudes and get steadily colder as altitude increases. According to this graph, which two layers is Kai observing?

Henry is building a model to show the layers of Earth's atmosphere for his science project. He wants to stack the layers in the correct order from the ground up to space. Which of the following is the correct order of the atmosphere layers from Earth to space?

While studying for her science test, Mia reads that the lower part of the thermosphere is called the _________.

David is preparing a science project about the Earth's atmosphere. He wants to know what percentage of our atmosphere is made up of other gases such as argon, water vapor, and carbon dioxide. What percentage should he write in his report?

Charlotte is reading about Earth's atmosphere for her science project. She wants to know in which layer she will find the ozone layer. Where should she look?

Priya is learning about how Earth's atmosphere helps keep the planet warm. She looks at this diagram in her science class. What does this diagram illustrate?

Priya is reading about the Earth's atmosphere and wonders which layer is considered space. Which layer is considered space?

Priya is curious about why the Earth's atmosphere doesn't just float away into space. What enables the atmosphere of Earth to stay in place?

Ava is learning about the environment in her science class. Her teacher asks her to explain how the ozone layer helps protect the Earth. What should Ava say?

While helping Scarlett with her science homework, Liam claims that the mesosphere is the layer of the atmosphere that contains the ozone layer. Is Liam correct?

Jackson is studying for his science test and reads that the layer of the atmosphere where weather occurs is the thermosphere. Is this statement correct?

While stargazing, Nora wonders if most meteoroids burn up in the mesosphere.

Isla is curious about where satellites orbit the Earth. In which layer of the atmosphere do we find satellites in space?

Abigail is studying for her science test and reads that the troposphere is made up of helium and hydrogen. True or False?

Which layer of the atmosphere contains the highest percentage of water vapor?

What is Global Warming?

Global warming is caused by a phenomenon known as the greenhouse effect.

Why are too many greenhouse gases bad for the environment?

Which one is not a fossil source?

A student draws a model to represent the precesses involved in the water cycle, as shown. To which process is the formation of clouds related?

If groundwater reaches earth's surface, how does it reenter the water cycle?

Gravity is not a factor in the water cycle

What is the water that is above the Earth's surface?

What is it called when water flows across the Earth's surface into bodies of water?

What is the correct order of the water cycle?