Classifying Matter
This pure substance contains only one type of atom.
What is an element?
Water droplets bead up because water molecules attract one another through this property.
What is cohesion?
In a chemical reaction, atoms are rearranged, but this total quantity remains the same in a closed system.
What is mass?
In the equation F=ma , this letter represents acceleration.
What is a?
The height of a wave from its resting position to a crest is its this.
What is amplitude?
This pure substance contains two or more elements chemically bonded in a fixed ratio.
What is a compound?
Water sticking to the sides of a glass demonstrates this attraction between different substances.
What is adhesion?
In a balanced chemical equation, the number of each kind of atom is this on both sides.
What is equal?
A net force of 12 newtons acts on a 3-kilogram object. Its acceleration is this.
What is 4 meters per second squared?
The number of wave cycles that pass a point in a given amount of time is this.
What is frequency?
This mixture has a uniform composition throughout, like salt dissolved completely in water.
What is a homogeneous mixture?
This property creates a thin “skin” at the surface of water, allowing some small insects to stand on it.
What is surface tension?
A reaction produces 12 grams of product in a closed system. The total mass of the reactants was this.
What is 12 grams?
A swimmer pushes water backward, and the water pushes the swimmer forward. This law describes the equal and opposite forces.
What is Newton’s Third Law?
The distance from one crest to the next crest is this wave property.
What is wavelength?
A mixture of sand and water has visibly different parts. It is this type of mixture.
What is a heterogeneous mixture?
A solution with a pH below 7 is classified as this.
What is an acid?
When wood burns in an open container, the measured mass of the remaining ash may be less than the original wood because some products escape as this.
What are gases?
A cart accelerates when pushed, then continues moving after the push ends until friction slows it. This situation illustrates Newton’s Second Law during the push and this law after the push.
What are Newton’s First and Second Law?
This electromagnetic wave is used in medical imaging to view bones.
What are X-rays?