ENVR-1301 (Week 2 Quiz)

A solution of pH 5 has __________ times more hydrogen ions than that of pure water. 5 10 50 100

100

All of the following are considered reservoirs of carbon except __________. Sediments Aquifers Plants the oceans

Aquifers

The ___________ consists of all the planet's organisms and the abiotic (nonliving) portions of the environment with which they interact. Biosphere Lithosphere Atmosphere Hydrosphere

Biosphere

Which one of the following describes a positive feedback loop? Positive feedback loops are relatively common in nature compared to negative feedback loops. A positive feedback loop would stabilize the concentration of a substance. Positive feedback loops are more common in natural systems altered by human actions. A positive feedback loop would reverse a change that may cause damage to an ecosystem.

Positive feedback loops are more common in natural systems altered by human actions.

In an atom, which of the following components is located in the nucleus? Protons Electrons Neutrons Ions

Protons, Electrons

Which of the following best describes the role of autotrophs in ecosystems? They consume other organisms for energy. They produce their own organic molecules, which can be broken down for energy. They produce their own inorganic molecules, which can be broken down for energy. Without heterotrophs, there would be no autotrophs.

They produce their own organic molecules, which can be broken down for energy

A(n) __________ is an example of an ecosystem with high primary productivity, while a __________ is an example of an ecosystem with low primary productivity. desert; tundra open ocean; wetland tundra; coral reef algal bed; desert

algal bed; desert

Ecosystems that rapidly convert solar energy to biomass _________ are usually found in cold, damp climates where decomposition is slow have little vegetation are said to have high secondary productivity are said to have high primary net productivity

are said to have high primary net productivity

Which of the following are the reactants (ingredients) needed for photosynthesis to occur? glucose, oxygen, and sunlight carbon dioxide, water, and sunlight plant seeds, water, and soil sunlight, plants, and oxygen

carbon dioxide, water, and sunlight

Which of the following represent the reactants (ingredients) necessary for cellular respiration? carbon dioxide, water, and oxygen glucose and oxygen starch and enzymes hydrogen sulfide, carbon dioxide, and water

glucose and oxygen

Atoms of iron (Fe) and sulfur (S) form iron sulfide (FeS) when the iron atom donates electrons to the sulfur atom. The type of bond formed would be a(n) __________. covalent bond bionic bond methane bond ionic bond

ionic bond

Although 78% of Earth's atmosphere is nitrogen, nitrogen is limited in most ecosystems because __________. nitrogen is used up by living organisms very little nitrogen is needed by living organisms plants can assimilate nitrogen only during the day since sunlight is needed for photosynthesis the natural conversion of atmospheric nitrogen occurs via only lightning and nitrogen-fixing bacteria

the natural conversion of atmospheric nitrogen occurs via only lightning and nitrogen-fixing bacteria

How do plants contribute to the water cycle? through the process of transpiration through the evaporation of water from their roots through the process of infiltration through the process of condensation

through the process of transpiration