Chemical Reactions
Water and Carbon Dioxide are waste products released as a direct result of
(1)asexual reproduction
(2) mechanical digestion
(3) natural selection
(4) cellular respiration
(4) cellular respiration
Which two gases, when released into the atmosphere, are believed to contribute most to global warming?
(1) nitrogen and oxygen
(2) nitrogen and carbon dioxide
(3) methane and oxygen
(4) methane and carbon dioxide
(4) methane and carbon dioxide
Which terms best describe the properties of a gas?
(1) definite volume and a defi nite shape
(2) definite volume and no defi nite shape
(3) no definite volume and a defi nite shape
(4) no definite volume and no defi nite shape
(3) no definite volume and a defi nite shape
When a flashlight is turned on Which form of energy is being converted to electrical energy by the batteries in the fl ashlight?
(1) chemical (2) nuclear (3) solar (4) sound
Chemical Energy
Which human activity would help reduce the amount of carbon dioxide in the atmosphere?
(1) decrease the burning of fossil fuels
(2) decrease the number of recycling programs
(3) increase the human population
(4) increase the number of cars being driven
(1) decrease the burning of fossil fuels
The primary function of a plant’s roots is to
(1) absorb water
(2) perform photosynthesis
(3) produce seeds
(4) exchange gases
(1) absorb water
Low-pressure systems generally move across the United States from
(1) north to south
(2) east to west
(3) west to east
(4) south to north
(1) north to south
(2) east to west
(3) west to east
(4) south to north
In a pedigree chart, the information is organized by?
(1) energy flow in an ecosystem
(2) population growth for pea plants
(3) the number of chromosomes in an organism
(4) the passing of a trait from one generation to another
(4) the passing of a trait from one generation to another
Which set of Earth components is arranged in order from solid to liquid to gas?
(1) hydrosphere, atmosphere, lithosphere (2) hydrosphere, lithosphere, atmosphere (3) lithosphere, atmosphere, hydrosphere (4) lithosphere, hydrosphere, atmosphere
(4) lithosphere, hydrosphere, atmosphere
In 1865, a pond was surrounded by open fields. Today, the same area is swampy and surrounded by a forest. Which process is responsible for this change?
(1) metamorphosis
(2) conservation
(3) ecological succession
(4) crustal plate movement
(3) ecological succession
Which substance in green plants needs to absorb sunlight during photosynthesis?
(1) chlorophyll
(2) cytoplasm
(3) oxygen
(4) water
(1) chlorophyll
Which event is an example of a physical change?
(1) iron rusting
(2) fireworks exploding
(3) eggs cooking
(4) ice melting
(4) ice melting
Cell division occurs as part of which process?
(1) Energy in food is released.
(2) A cut on a person’s finger heals.
(3) A disinfectant destroys microbes.
(4) The body eliminates wastes.
(2) A cut on a person’s finger heals.
A student correctly determined the density of two rocks. If the volumes of the two rocks are equal, the rock with the greater density has a
d=m*v
(1) rounder shape
(2) smoother surface
(3) greater mass
(4) smaller size
(3) greater mass
Compared to the amount of genetic information contained in a normal human body cell, the amount contained in a normal human sperm cell is
(1) the same
(2) twice as much
(3) one-half as much
(4) one-fourth as much
(3) one-half as much
Which type of cell uses energy to carry out life processes?
(1) plant cell, only
(2) animal cell, only
(3) both a plant cell and an animal cell
(4) neither a plant cell nor an animal cell
(4) neither a plant cell nor an animal cell
A plant growing toward a light source is an example of an organism
(1) attracting a mate
(2) destroying infectious germs
(3) responding to external stimuli
(4) obtaining moisture from the air
(3) responding to external stimuli
What is the main source of energy for the water cycle?
(1) the Moon
(2) the Sun
(3) winds
(4) oceans
(1) the Moon
(2) the Sun
(3) winds
(4) oceans
Which set of terms describes natural fertilization and development in humans before birth?
(1) external fertilization, external development
(2) external fertilization, internal development
(3) internal fertilization, external development
(4) internal fertilization, internal development
(4) internal fertilization, internal development
Genes are a part of a
(1) cell wall
(2) chromosome
(3) hormone
(4) vitamin
(2) chromosome
When calcium carbonate (CaCO3 ) is heated, it decomposes to form calcium oxide (CaO) and carbon dioxide (CO2 ). The equation below shows this reaction.
CaCO3 —› CaO + CO2
Reactant Products
Identify the relationship between the mass of the reactants and the products
(1) is less than the mass of CaO plus the mass of CO2
(2) is greater than the mass of CaO plus the mass of CO2
(3) equals the mass of CaO plus the mass of CO2
(4) equals the mass of CaO minus the mass of CO2
(3) equals the mass of CaO plus the mass of CO2
A cactus plant, a snake, and a hawk can be members of the same
(1) community
(2) kingdom
(3) population
(4) species
(3) population
The fur on an arctic polar bear appears white all year. The color of the fur is an example of
(1) an adaptation helping an organism to survive
(2) an organism exchanging materials with its environment
(3) an organism responding to internal stimuli
(4) metabolism regulating an organism’s activities
(1) an adaptation helping an organism to survive
Urban growth and uncontrolled waste disposal by humans most likely results in
(1) conservation of fossil fuels
(2) environmental degradation
(3) improved soil composition
(4) a balanced ecosystem
(2) environmental degradation
A change in an animal’s DNA, leading to a variation in a species, is called
(1) a mutation
(2) an infection
(3) selective breeding
(4) sexual reproduction