Classifying Matter
Gold, silver, helium, lead, and oxygen are all examples of this pure classification of matter.
This law states that matter is neither created nor destroyed, but can only change from one form to another.
the Law of Conservation of Mass
This property occurs when water molecules are attracted to other water molecules, causing water to form spherical droplets.
cohesion
Measured in Newtons, this represents the end result of all combined forces acting on an object.
net force
All stars start of as a
nebula
Table salt (NaCl) and water (H2O) represent this category of matter composed of chemically combined elements.
compound
You can use this to identify the specific elements involved in chemical reactions.
the Periodic Table of Elements
When water molecules are more attracted to another object than to each other, this property causes water to spread out on surfaces.
adhesion
These types of forces act on an object without changing its motion, resulting in a net force equal to zero.
balanced force
When evaluating acids and bases, their relative pH level is compared against this standard neutral substance.
water
Salt water, sugar water, and water with food coloring are classified as
homogenous mixtures
The conservation of mass in a chemical reaction relies on the rearrangement of these microscopic units (hint: the smallest unit of matter).
atoms
Resulting from adhesion and cohesion, this phenomenon allows water to climb against gravity up narrow glass tubes or graduated cylinders.
capillary action
Newton's First Law describes this concept—the tendency of an object to resist changes to its state of motion.
inertia
Acids have a pH of
less than 7
A salad, a mixture of salt and sand, or oil mixed with water are examples of
heterogenous mixtures
This fundamental plant process is a prime example of a chemical reaction where atoms rearrange and mass is conserved.
photosynthesis
Driven by strong cohesion and hydrogen bonding, this feature allows paperclips, needles, or insects to rest on top of water without sinking.
surface tension
According to Newton's 3rd Law of Motion, "for every action force, there is an equal and opposite reaction force." This indicates that all forces come in _______
pairs
What are the two characteristics that an HR diagram uses to categorize stars?
Luminosity and Temperature
What word is used to describe a mixture that is blended evenly throughout?
uniform
chemical equations; same
Frogs sticking to surfaces, dew droplets clinging to grass, or water clinging to the outside of a glass are observable phenomena caused by this property.
adhesion
If I wanted to calculate the acceleration of an object, describe what I would have to do?
A= F/M
At the end of a massive stars life cycle, it will become either a ________ or a _________.
black hole or neutron star