Exploring Air and Water

What is the atmosphere?

• The atmosphere is a solid layer of rock beneath the Earth's surface.

• The atmosphere is the ocean surrounding the Earth.

• The atmosphere is a type of plant that grows in the soil.

• The atmosphere is the layer of gases surrounding Earth.

Name the layers of the atmosphere.

• Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere

• Atmosphere, Lithosphere, Magnetosphere

• Lithosphere, Hydrosphere, Biosphere

• Stratosphere, Ionosphere, Ozone Layer

What are the main components of air?

• Ozone, Methane, Sulfur Dioxide

• Hydrogen, Helium, Neon

• Carbon Monoxide, Ammonia, Phosphorus

• Nitrogen, Oxygen, Argon, Carbon Dioxide, Trace Gases

List two properties of air.

• Air does not support combustion.

• Air has a fixed volume.

• Air is compressible and exerts pressure.

• Air is a solid substance.

How is air used in our daily lives?

• Air is used for breathing, cooking, heating, cooling, transportation, and various industrial applications.

• Air is only important for flying aircraft.

• Air is primarily used for making music.

• Air is used for growing plants only.

What are water impurities?

• Water impurities are contaminants such as sediments, chemicals, and microorganisms that affect water quality.

• Water impurities are beneficial minerals that enhance taste.

• Water impurities are only physical particles like rocks and dirt.

• Water impurities are solely caused by human activities.

What is one way to remove insoluble impurities from water?

• Filtration

• Distillation

• Evaporation

• Boiling

Explain the process of sedimentation and decantation.

• Sedimentation refers to the chemical reaction that breaks down particles, and decantation is the process of crystallization.

• Sedimentation is the process of mixing particles into a fluid, and decantation is the separation of solids from liquids using a sieve.

• Sedimentation is the settling of particles in a fluid, followed by decantation, which is the pouring off of the clear liquid.

• Sedimentation involves heating the liquid to evaporate it, while decantation is the filtration of solids.

What is filtration and how does it work?

• Filtration is a method of mixing liquids together.

• Filtration is the process of heating liquids to evaporate them.

• Filtration is a technique used to dissolve solids in water.

• Filtration is the process of separating solids from liquids or gases using a filter medium.

Describe the process of evaporation.

• Evaporation is the process of freezing water into ice.

• Evaporation is the transformation of liquid water into water vapor due to energy absorption.

• Evaporation occurs when water is mixed with oil.

• Evaporation is the conversion of water vapor back into liquid water.