STAAR Review Question Preview (ID: 46686)


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What percentage of available energy gets passed from one energy level to the next?
a) 10%
b) 20%
c) 50%
d) 100%

Identify the following as characteristics of primary or secondary succession. Regrowth of an ecosystem after a disturbance.
a) Primary Succession
b) Secondary Succession
c)
d)

Where does all of the energy in food chains, food webs, and energy pyramids originate?
a) Producers
b) Sun
c) decomposers
d)

What term describes the amount of mass in a given volume of a certain substance?
a) Force
b) Density
c) Speed
d) none of the above

Which category of elements is located on the right side of the Periodic Table? List 3 examples. Which category of elements is located on the left
a) Metals
b) Nonmetals
c) Meltalloids
d)

Which category of elements is located on the right side of the Periodic Table?
a) Metals
b) Nonmetals
c) Metalliods
d)

Which category of elements is located on the “zig-zag” line or “staircase” on the Periodic Table?
a) Metals
b) Nonmetals
c) Metalloids
d)

Which of the following is not evidence that a chemical reaction has taken place?
a) Gas produced
b) Unexpected color change
c) Change in energy (light or temperature)
d) Change of size or shape

What is the name given to the horizontal rows of elements on the Periodic Table?
a) Group
b) Period
c)
d)

What term describes a shorthand way to represent an element or compound using symbols for its elements?
a) Chemical Formula
b) Chemical Symbol
c) Chemical Equation
d)

What is the name given to the vertical columns of elements on the Periodic Table?
a) Group
b) Period
c)
d)

What characteristic determines an element’s chemical properties such as reactivity?
a) Protons
b) Neutrons
c) Electrons
d) Valance Electrons

What characteristic is the most important information to know when trying to determine an element’s identity?
a) Protons
b) Neutrons
c) Electrons
d) Valance Electrons

Which subatomic particle has a mass of 1 amu, a positive charge, and is located inside the nucleus?
a) Protons
b) Neutrons
c) Electrons
d) Valance Electrons

Which subatomic particle has a mass of 1 amu, a neural charge, and is located inside the nucleus?
a) Protons
b) Neutrons
c) Electrons
d) Valance Electrons

Which subatomic particle has a mass of 1/1836 amu, a negative charge, and is located outside of the nucleus?
a) Protons
b) Neutrons
c) Electrons
d) Valance Electrons

What term describes a variety of species with genetic variations in an ecosystem?
a) Environmental Changes
b) Biodiversity
c) Ecological Succession
d) Organism Relationships

Which two body systems work together to break down food in the body and remove solid and liquid wastes?
a) Muscular and Skeletal
b) Endocrine and Circulatory
c) Digestive and Excretory
d) Digestive and Nervous

What term describes organisms that are better suited for their environment are more likely to survive and reproduce?
a) Variation
b) Genetic Diversity
c) Selective Breeding
d) Natural Selection

Identify the following as characteristics of primary or secondary succession. Forms where nothing previously existed.
a) Primary Succession
b) Secondary Succession
c)
d)

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