Worksheets8.1 How Organisms Obtain Energy
Total questions: 15
Worksheet time: 12mins
What is the major source of energy for all life on Earth?
natural gas
the sun
coal
wind power
What does the first law of thermodynamics state?
entropy increases
energy is conserved
metabolism decreases
chemicals are produced
Autotrophs that convert light energy into chemical energy are called .
photoautotrophs
heterotrophs
chemoautotrophs
omnivores
All of the chemical reactions in an organism's cells are called ____
hemotrophy
autotrophy
metabolism
thermodynamics
What catabolic reaction is occurring in this cycle?
photosynthesis
cellular respiration
absorption of sunlight
conversion of sunlight
What chemical bond in ATP releases energy when broken?
phosphate
sulfur
oxygen
potassium
The group that makes their own food is (a) . The organisms in this group are called (b) . The group that must eat other organisms for food is (c) . The organisms in this group are called (d) . Some organisms get their energy from inorganic substances, such as hydrogen sulfide. These organisms are called (e) .
Circle the part of the ATP molecule that gets ripped off to release energy.
Which is not a characteristic of energy?
cannot be created or destroyed
is the capacity to do work
exists in forms such as light, chemical, and mechanical
changes spontaneously from disorder to order
Which organism depends upon an external source of organic compounds?
autotroph
heterotroph
chemoautotroph
photoautotroph
Which would be a habitat for chemoautotrophs but not photoautotrophs?
cold tundra plain
deep ocean trench
high-altitude mountain
shallow ocean water
Which describes the process of cellular respiration?
anabolic pathway that breaks molecules into energy
anabolic pathway that builds molecules of stored energy
catabolic pathway that breaks molecules into energy
catabolic pathway that builds molecules of stored energy
A black widow spider snaring an insect to eat is an example of an organism called a _______.
heterotroph
autotroph
chemoautotroph
omnivore
In 1977, scientists discovered extremely hot, toxic substances pouring from fissures in deep ocean trenches. The scientists named these fissures black smokers, and, to their surprise, discovered diverse ecosystems thriving near these locations. These ecosystems contained organisms such as large clams, mussels, snails, and avariety of worms. Infer the energy source for these ecosystems.
(a)
Which energy transformation can only occur in autotrophs?
chemical energy to mechanical energy
electrical energy to thermal energy
light energy into chemical energy
mechanical energy into thermal energy
