Grade 8 Science Final Exam Review
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62 Terms
Takes Carbon dioxide produced by the cells and transports it to the lungs to be eliminated
Respiratory System
3 multiple choice options
Removes liquid waste
excretory system
3 multiple choice options
break down food into smaller molecules so that the body can absorb and use for energy, growth, and repair
digestive system
3 multiple choice options
Pump the blood
circulatory system
3 multiple choice options
Communicates the instructions from the brain to the body
Nervous system
3 multiple choice options
Makes different parts of the body move
Muscular System
3 multiple choice options
The Basic unit of life
Cell
3 multiple choice options
Parts that make up a cell
organelles
3 multiple choice options
Thin film that surrounds all cells
Cell Membrane
3 multiple choice options
the system that transports oxygen, food and waste to the different parts of
the body.
Circulatory System
3 multiple choice options
substance that must be eliminated from the body.
Waste
3 multiple choice options
transparent gel that fills the cell and contains other organelles.
Cytoplasm
3 multiple choice options
organelle which is hard and rigid, composed of cellulose, which surrounds plant cells.
Cell wall
3 multiple choice options
big round organelle that contains the chromosomes in the cell.
Nucleus
3 multiple choice options
small bean-shaped organelles that uses oxygen to 'burn' food and release energy for the cell (cellular respiration)
Mitochondria
3 multiple choice options
a "bubble" in the cell; can contain water, waste, or a reserve of food. Bigger and more important in plant cells.
Vacuole
3 multiple choice options
when cells reproduce by splitting in two.
Mitosis
3 multiple choice options
Green organelle that contains chlorophyll and makes photosynthesis; exists only in plant cells.
Chloroplast
3 multiple choice options
a group of similar cells.
Tissues
3 multiple choice options
the system that makes your body move.
muscular system
3 multiple choice options
the system that controls the activities of the body, and that detects and reacts
to changes inside the body and in the environment.
Nervous system
3 multiple choice options
substance needed from food.
Nutrient
3 multiple choice options
a group of organs that work together to perform a necessary function for the body.
Organ system
3 multiple choice options
a part of the body made of two or more types of tissue, which has a specific function.
organ
3 multiple choice options
when the mitochondria in the cells use food and oxygen to release energy, and produce carbon dioxide and water as waste products
Cellular Respiration
3 multiple choice options
the system that absorbs nutrients from food, and eliminates solid waste.
digestive system
3 multiple choice options
the system that eliminates liquid waste from the body.
excretory system
3 multiple choice options
the intensity of a force divided by the surface area on which it is spread out.
pressure
3 multiple choice options
unit of measure of pressure
Pascal
the pressure exerted by the weight of the atmosphere above an object.
Atmospheric Pressure
3 multiple choice options
the amount of matter in something
mass
3 multiple choice options
when forces on an object do not cancel out so the object moves.
unbalanced forces
the amount of space occupied by something.
Volume
3 multiple choice options
the ratio of the mass divided by the volume of something.
density
3 multiple choice options
when opposing forces are equal and cancel each other out so the object does not move.
balanced forces
1 multiple choice option
a push or pull on something
force
3 multiple choice options
the upward force on an object in a fluid. .
buoyancy
3 multiple choice options
the unit of measurement for forces
Newtons
3 multiple choice options
the force of gravity on something
weight
3 multiple choice options
the series of electromagnetic waves ranging from the
longest wavelength (low energy) to the shortest (high energy)
Electromagnetic Spectrum
2 multiple choice options
the height of the crest or the depth of the trough of a wave
Amplitude
3 multiple choice options
a property of light that says it travels in a straight line
rectilinear propagation
3 multiple choice options
see-through; lets light travel clearly through it
Transparent
2 multiple choice options
doesn't let light travel through it at all.
Opaque
2 multiple choice options
cloudy; lets light through but not clearly.
Translucid
2 multiple choice options
when light bounces off a glossy surface and forms an image of
the surroundings
Specular Reflection
1 multiple choice option
when light bounces off a rough surface and does NOT form an
image of the surroundings.
Diffuse reflection
the number of waves per second
frequency
2 multiple choice options
when the different colours of white light are separated into a rainbow
dispersion
3 multiple choice options
the distance between two crests or two troughs of a wave.
wavelength
3 multiple choice options
when light makes a bend as it passes from one substance into another.
refraction
3 multiple choice options
a curve surface like the outside of a sphere
convex
1 multiple choice option
a curved surface like the inside of a sphere
concave
1 multiple choice option
a flat surface
plane
the angle between the incident ray and the normal
angle of incidence
1 multiple choice option
the angle between the reflected ray and the normal
angle of reflection
1 multiple choice option
the light ray that hits the mirror
incident ray
2 multiple choice options
an imaginary line perpendicular to the surface of the mirror
Normal
the light ray that bounces off the mirror
reflected ray
2 multiple choice options
A metal weight in your hand has a weight of 0.79 N and a bottom surface of 0.016 m2. What pressure does it
cause on your hand?
49.4 Pa
A book on your desk weighs 16 N and has a bottom surface area of 0.60 m2
What pressure does it cause on your desk?
26.7 Pa
A piece of metal has a mass of 26.76 g and a volume of 3.0 cm3
a. Calculate its density
b. Use the density chart on p.10 to identify the metal.
Density chart will be given (see notes while studying)
8.92; Copper
Note 
Flashcards (24)