Earth's Systems
Which of these contain most of Earth’s water?
A. oceans
B. rivers
C. lakes
D. glaciers
A. oceans
Describes living factors in the environment e.g. plants and animals
Biotic factors
What is formed when two or more elements are chemically combined?
What is a compound?
Basic building block of all matter; the smallest unit of an element.
Atom
An event in which a disease spreads to many regions of the world is called
Pandemic
Where is most of the freshwater on Earth
located?
A. in the oceans
B. in polar ice and glaciers
C. in rivers, streams, and lakes
D. under the ground
B. in polar ice and glaciers
Non-living factors in an ecosystem, e.g. temperature, sunlight
Abiotic factors
Elements are described as pure substances
because
A. they are found in nature.
B. they cannot be separated into parts by physical means.
C. they have no charge.
D. they can be produced in a laboratory.
What is B they cannot be separated into parts by physical means?
The number of protons in the nucleus of an atom
Atomic number
A mosquito that transmits malaria from one person to another is
Vector
A rock layer that collects and stores water is
called?
A. an aquifer
B. an estuary
C. a glacier
D. a hydrosphere
A. an aquifer
A organism that performs photosynthesis is called
A. a decomposer
B. a consumer
C. an autotroph
D. a heterotroph
C. an autotroph
What are the two types of Mixtures?
What is Homogeneous and Heterogeneous?
Group 1 elements, except for hydrogen, which are very reactive/least stable
Alkali Metals
Which is the best way to help prevent the flu from becoming pandemic?
A. getting a vaccination
B. taking antibiotics
C. eating fruits and vegetables
D. washing hands often
A. getting a vaccination
An area of land that drains into a river or lake is
called
A. an ecosystem
B. a wetland
C. a watershed
D. a habitat
C. a watershed
Process in which chemical energy is used to produce carbohydrates
Chemosynthesis
When substances combine to form a mixture, they
A. keep their original properties.
B. form new chemical bonds.
C. form a new compound.
D. cannot be separated physically
What is A keep their original properties?
A change in matter that produces one or more new substances; irreversible
Chemical change
Which of these diseases can be treated with antibiotics?
A. lyme disease
B. the common cold
C. influenza
D. AIDS
A. lyme disease
Pamlico Sound is an estuary because it is
A. an area fed by several rivers
B. an area that many watersheds drain into
C. an area that is protected by land on both sides
D. an area where freshwater mixes with saltwater
D. an area where freshwater mixes with saltwater
The process by which bacteria return nitrogen gas to the atmosphere is called
A. reproduction
B. denitrification
C. nitrogen fixation
D. transpiration
B. denitrification
Filtration can be used to separate a mixture of
What is a solid and a liquid?
Which elements in the periodic table are least likely to combine with other elements?
A. halogens
B. noble gases
C. alkaline earths
D. transition metals
B. noble gases
Which would be the least effective in treating an illness caused by a virus?
A. drinking plenty of fluids
B. widespread vaccination
C. getting extra rest and sleep
D. daily treatment with antibiotics
D. daily treatment with antibiotics