Unit 1 & 2
Which action illustrates a chemical change?
A.painting a wood chest
B.sawing a wood plank
C.burning wood chips
D.cutting down a tree
burning wood chips
Which topic area would be the best to research to find ways of reducing environmental problems caused by humans?
A.converting sunlight into electricity
B.looking for new coal reserves
C.finding reservoirs that contain oil
D.converting forests into farmland
converting sunlight into electricity
A certain type of hybrid car utilizes a braking system in which energy is recovered and stored in batteries. This is an example of which type of energy conversion?
kinetic energy converted to potential energy
When compared to the other layers of Earth, which layer has the lowest density?
crust
organism → population → community → ecosystem → biosphere
Levels of organization in an environment
Living matter is composed primary of what element
oxygen
Some students are performing hardness tests on several substances. X scratches Y. Y scratches Z. Z scratches W. Which of these statements best describes substance W’s hardness?
F.W is the softest of the four substances tested.
G.W is the hardest of the four substances tested.
H.W can scratch Y.
J.W can scratch X.
W is the softest of the four substances tested.
heat is transferred from
hot to cold
Which tectonic plate is directly south of the African Plate?
Antartic plate
Water is biotic or abiotic
abiotic
Which chemical cannot be further broken down into other chemicals using ordinary laboratory processes?
NaCl,Na,H2O, HFNa
An element with which property would be best to use in electrical wiring?
F.insulator
G.conductor
H.malleable
J.porous
conductor
hot air will rise or sink
rise
Which process accounts for the formation of horizontally layered rocks?
compaction and cementation
Organisms can be separated by their most basic characteristics into the broadest groups known as
Domain
A student was working with chemicals in the classroom. What preventative safety equipment should be used to avoid any eye chemical burns.
goggles
Equation for density
mass/volume
Equation for speed
distance/ time
The planets in the solar system revolve around the Sun because the Sun
has stronger gravity
In which way is a prokaryotic cell different from a eukaryotic cell?
prokaryotic cell had no nucleus
A scientist lost the cap to an ammonia bottle, so she moved the ammonia into a clean container with a lid. What else should she do to be safe?
Label the new container clearly.
Calculate density
m= 5 g
v=5 mL
d= 1g/mL
calculate speed
distance = 500m
time= 5 seconds
speed = 100m/s
Characteristics of an Object in the Solar System
Irregularly shaped
Composed of metal and rock
Much smaller than planets
Similar orbital pattern as the planets
asteroid
Muscle tissues are made of specialized units called
Cells