Elements
An element with 27 atoms.
What is cobalt?
This is the process where liquid water heats up from the sun and turns into water vapor, rising into the air.
What is evaporation?
This is another common scientific name for a homogeneous mixture, where one substance is completely dissolved into another.
What is a solution?
Unlike a homogeneous mixture, this type of mixture does not look the same throughout, and you can easily see and separate its different parts.
What is a heterogeneous mixture?
This fluffy, sweet campfire treat is actually a solid colloid made by trapping gas bubbles inside a sugary gelatin mixture.
What is a marshmallow?
Fluorine, chlorine, bromine, and iodine belong to this group of highly reactive nonmetals that all possess seven valence electrons.
What are the halogens?
This is the specific term for water that does not soak into the ground after raining, but instead flows over the land into rivers, lakes, and oceans.
What is runoff?
In a saltwater solution, this is the specific term used to describe the water because it is the substance doing the dissolving.
What is the solvent?
This popular lunch food, often made with lettuce, tomatoes, cucumbers, and croutons, is a classic example of a heterogeneous mixture.
What is a salad?
This weather phenomenon is a liquid-in-gas colloid that forms close to the ground, significantly reducing visibility for drivers.
What is fog?
Named after the Latin word for flint, this metalloid is a major component of sand and is widely used to make glass and computer chips.
What is silicon?
This process occurs when water on the surface soaks down through the soil and rocks to replenish underground water supplies.
What is infiltration (or percolation)?
In a sugary drink mixture, sugar is classified as this specific component because it is the substance being dissolved.
What is the solute?
This specific type of heterogeneous mixture contains large particles that will settle to the bottom over time if left undisturbed, like muddy water or oil and vinegar.
What is a suspension?
This is the specific scientific term for a colloid formed by mixing two liquids that usually repel each other, such as oil and water in mayonnaise.
What is an emulsion?
These elements run in a staircase line down the right side of the periodic table, sharing properties of both metals and nonmetals.
What are metalloids?
This is the rare process where dry ice or heavy snow changes directly from a solid into water vapor, completely skipping the liquid phase.
What is sublimation?
This common homogeneous mixture is actually a gas solution containing about 78% nitrogen and 21% oxygen.
What is air?
This specific type of heterogeneous mixture features medium-sized particles that do not settle out over time, giving substances like milk, fog, or shaving cream a cloudy appearance.
What is a colloid?
Unlike a suspension, the tiny particles suspended inside a colloid will never do this action, even if the mixture sits completely undisturbed on a shelf for days.
What is settle (or sink/separate)?
This highly flammable element is the simplest and lightest of all elements, consisting of just one proton and one electron.
What is hydrogen?
This massive energy source drives the entire water cycle by heating Earth's water and powering the force of gravity that pulls precipitation back down.
What is the sun?
This is the specific term for a homogeneous mixture made of two or more metals, such as brass, bronze, or steel.
What is an alloy?
This separation method uses a porous barrier, like mesh or paper, to separate the solid particles from the liquid in a heterogeneous mixture.
What is filtration?
This is the metric unit of measurement—equal to one-billionth of a meter—typically used to measure the tiny microscopic particles suspended within a colloid.
What is a nanometer?