How can we help?

You can also find more resources in our Help Center.

27 terms

8th grade TCAP vocabulary

modified from: Holt Science & Technology Grade 8 Tennessee
STUDY
PLAY
compound
substance made up of atoms of two or more different elements joined by chemical bonds
density
ratio of the mass of a substance to the volume of the substance
element
substance that cannot be separated or broken down into simpler substances by chemical means
law of conservation of mass
law that states that mass cannot be created or destroyed in ordinary chemical and physical changes
nucleus
an atom's central region, which is made up of protons and neutrons
pH
value that is used to express the acidity or basicity (alkalinity) of a system
product
substance that forms in a chemical reaction
reactant
substance or molecule that exists before a chemical reaction
relative age
approximate age of fossils or other objects in rock layers determined by comparing whether the surrounding rock layers are younger or older
volume
measure of the size of a body or region in three dimensional space
weight
measure of the gravitational force exerted on an object
atom
smallest particle that makes up all types of matter
adaptive technology
device or product that has been changed in some way to better help someone, special version of an already existing product
assistive technology
device, product, or service that has been developed to help someone
adaptation
any variation that makes an organism better suited for their environment
mass
amount of matter in an object
gravity
force that exists between any two objects that have mass
chemical change
change in which the composition of a substance changes
physical change
change in which the form or appearance of matter changes, but not its composition
gas
matter that does not have a definite shape or volume; has particles that move at high speeds in all directions
liquid
matter with a definite volume but no definite shape that can flow or slide from one place to another
solid
matter with a definite shape and volume; has tightly packed particles that move mainly by vibrating
graduated cylinder
tool used to measure the volume of liquids
balance
tool used to measure mass
scale
tool used to measure force
dependent variable
variable that changes as a result of a change in the experimental variable
independent variable
variable that the experimenter changes