Science Benchmark Review Part 3 (Jones) Question Preview (ID: 42100)


Review Of Discovery Ed Science Benchmark. TEACHERS: click here for quick copy question ID numbers.

What does the term...dissociate...mean?
a) the splitting of molecules into ions in solution
b) the splitting of atoms into protons, neutrons, and electrons
c) the loss of electrons by an atom
d) the change from a liquid into a gas

At room temperature, oxygen is a gas and hydrogen is a gas. When they combine at room temperature, they form a ___.
a) solid
b) liquid
c) gas
d) solution

When a species of organisms cannot adapt or change to meet its needs in a changing environment, what happens to this species?
a) They evolve into a new organism.
b) They increase in number.
c) They decrease and become extinct.
d) They go into hibernation.

Some scientists believe that life on Earth began about 3.5 billion years ago. What do they base this belief on?
a) the fossil record
b) the distance from the sun to Earth
c) the time it takes to orbit Earth
d) the thickness of the mantle

Of the 4 organisms listed, which supports the other organisms by making food from the nonliving components of the ecosystem?
a) mice
b) grass
c) snake
d) eagle

What are the traits called that organisms use to survive?
a) homologous structures
b) adaptations
c) evolutionary characteristics
d) ancient structures

The hydra is an animal that lives in freshwater streams and ponds. It reproduces by producing eggs and also by budding, a form of asexual reproduction. What advantage does budding give hydra?
a) Hydra can reproduce through meiosis.
b) Hydra can reproduce without the need for a mate.
c) Budding takes more time than sexual reproduction.
d) Budding increases genetic diversity among hydra.

Plants produce carbohydrates during what cellular process?
a) replication
b) glycolysis
c) respiration
d) photosynthesis

What is the function of plant leaves?
a) They obtain minerals for growth.
b) They trap light energy for use during photosynthesis.
c) They obtain water for growth.
d) They release stored energy.

What is one benefit of using chemical pesticides on food plants?
a) The soil around the crops becomes richer.
b) Insects cannot eat or lay eggs on the crops.
c) The crops absorb more nutrients.
d) The food that is produced lasts longer without spoiling.

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