unit 2 (matter)
Sodium is an element found in table salt. It
contains 11 protons and 12 neutrons. How many
electrons are found in a neutral atom of sodium
11
The wise use of natural resources is called
conservation
An event in which a disease spreads to many regions of the world is called
a pandemic
A genome is
the complete sequence of an organism’s DNA
Which of the following is an abiotic factor in an ecosystem?
A. bacteria (B.air (C. niche (D. grass
air
What is formed when two or more elements are
chemically combined?
compound
What is a consequence of continued use of coal for
power production?
decrease in coal reserves
A mosquito that transmits malaria from one
person to another is
a vector
An animal that has exactly the same set of genes
as its parent is an example of
A clone
What is a habitat
the place where an organism lives
The nucleus of an atom contains
protons and neutrons
Hydroelectric dams, nuclear power plants, coal-fired plants,
and solar panels are ways electricity can be produced.
Which method has the least ecological impact when
producing electricity
Solar panel
A vaccine is made from
a weakened or dead form of a pathogen
A DNA fingerprint is
a unique sequence of repeating units in a
section of DNA
Which of these is the producer
A. rabbit, B. fox, C. hawk, D. fern
fern
Elements in the same column of the periodic
table have
similar chemical properties
A city traffic system introduced separate express lanes for carpools that allowed them to bypass rush hour traffic. This increased the number of people choosing to carpool to work. Which outcomes was the initiative designed to support.
to reduce the use of fossil fuels resources
Why do doctors suggest that people get a flu
vaccine each year?
Viruses can mutate from year to year.
What is involved in creating genetically modified
bacteria
using biotechnology techniques
How much of the energy from one trophic level is transferred to the next
About 10% of the energy is transferred
When substances combine to form a mixture,
they
keep their original properties
Which energy source would have the lowest risk of depletion
coal,hydroelectric,natural gas,nuclear
hydroelectric
Which of these diseases can be treated with antibiotics
A. lyme disease
B. the common cold
C. influenza
D. AIDS
lyme disease
Genetic engineering has directly increased productivity in which U.S industry?
agriculture
The process by which bacteria return nitrogen gas to the atmosphere is called
denitrification