ENERGY
Which best describes the change in energy that takes place as a log of wood burns?
A The mechanical potential energy of the log of wood increases.
B The gravitational potential energy in the log of wood increases.
C The elastic potential energy of the log of wood decreases.
D The chemical potential energy in the log of wood decreases.
D The chemical potential energy in the log of wood decreases.
Mushrooms are considered decomposers because they obtain nutrients from
A water.
B oxygen.
C living animals.
D decaying plants.
D decaying plants.
Which of these best describes a coniferous
forest in the winter?
A a few small trees separated by mosses
and lichens
B a few trees without leaves separated by
tall grasses
C many trees covered by vines with large
green leaves
D many trees with green needles and few
other plants
D many trees with green needles and few
other plants
Which could be caused by convection in the atmosphere?
A land absorbing solar energy
B rising of ocean tides
C formation of a hurricane
D clouds reflecting sunlight
C formation of a hurricane
Students were asked to record and compare the wind speeds observed every 10 minutes over a
one-hour period. Which tool will best help conduct this investigation?
A telescope
B thermometer
C binoculars
D anemometer
D anemometer
A student has a toy Ferris wheel that moves when placed in sunlight.
Which best describes the energy transformation that moves the Ferris wheel?
A Solar→Electrical→Mechanical
B Mechanical→Electrical→Potential
C Solar→Mechanical→Chemical
D Potential→Electrical→Chemical
A Solar→Electrical→Mechanical
Gazelles living in the grasslands of Africa eat grass and tree leaves. Gazelles are
eaten by lions.
Which of these terms describes the role of gazelles in this ecosystem?
A producer
B herbivore
C carnivore
D decomposer
B herbivore
An organism lives in a region that has long winters with cool summer temperatures and high
precipitation amounts. In which biome does this organism most likely live?
A coniferous forest
B temperate grassland
C tropical rain forest
D coastal desert
A coniferous forest
For a science project, a group of students want to create a representation of how organisms depend
on one another in a freshwater biome.
Which procedure most likely needs to occur first in their project?
A build a model of the biome
B use a computer program to create the representation
C look for information that already exists about the biome
D introduce new species of animals into the biome and observe what happens
C look for information that already exists about the biome
A raccoon eats berries for energy. What type of energy do the berries provide to the raccoon?
A solar energy
B electrical energy
C nuclear energy
D chemical energy
D chemical energy
A grassland biome contains herbivores, carnivores, grasses, trees, and decomposers. The
carnivores obtain energy directly from
A herbivores.
B decomposers.
C grasses.
D trees
A herbivores.
Which material best conducts an electric current?
A glass
B silver
C rubber
D cork
B silver