http://www.testprepreview.com/STAAR/grade-8-science.htm
Realise that the Math tests and the last STAAR tests of this school year for Grades 6 - 8 are given the week of April 20-22nd. The school term doesn't end until June 8th.
This is an interesting article http://roadkillgoldfish.com/texas-officials-upset-over-low-staar-scores/
1. Which of the following elements are ordered from least reactive to most reactive according to the Periodic Table?
A. Ar, Cu, Na
B. Na, Ar, Cu
C. Na, Cu, Ar
D. Ar, Na, Cu
2. Evidence of a chemical reaction can be determined by all of the following except?
A. Modifying the arrangement of atoms
B. Endothermic and exothermic reactions
C. Equal masses of reactants and products
D. No change in energy
3. Which of the following is a star with an absolute magnitude of +10 and a temperature of 25,000K?
A. Main Sequence
B. Super Giant
C. Giant
D. White Dwarf
4. Which of the following below is not considered evidence of plate tectonics?
A. The shape of continents fits together like a puzzle
B. Fossil comparisons exist along where the continents would fit together
C. The Mid-Atlantic Ridge shows where new crust is formed
D. There is a large amount of inland seismic activity
5. On December 22 of every year, the people in the southern hemisphere of the earth experience which event?
A. Summer Solstice
B. Winter Solstice
C. Spring Equinox
D. Fall Equinox
6. Our planet's oceans are experiencing climate changes, pollution, and overfishing. Which of the following answers is not a result of human activity?
A. Diminishment of coral reefs
B. Destruction of food webs
C. Increased population of all species
D. Degradation or total loss of wetlands
7. In mosses, eggs and sperm are produced by:
A. Spores
B. Sporophytes
C. Gametophytes
D. Zygotes
8. Which statement correctly states the work-energy theorem?
A. The change in kinetic energy of an object is equal to the work done by the object
B. The change in kinetic energy of an object is equal to the work done on an object
C. The change in potential energy of an object is equal to the work done by the object
D. The change in potential energy of an object is equal to the work done on an object
9. Balance the following reaction between sulfuric acid and aluminum hydroxide by filling in the correct stoichiometric values for each chemical.
_ H2SO4 + _ Al(OH)3 => _ Al2(SO4)3 + _ H2O
A. 3, 2, 1, 6
B. 2, 3, 1, 3
C. 3, 3, 2, 6
D. 1, 2, 1, 4
10. Which of the following situations would result in the generation of new crust?
A. Two crustal plates converge
B. Two crustal plates move apart
C. Two crustal plates slide past one another
D. A crustal plate is pushed down into the mantle
Grade 8 Science Answer Key
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Realise that the Math tests and the last STAAR tests of this school year for Grades 6 - 8 are given the week of April 20-22nd. The school term doesn't end until June 8th.
This is an interesting article http://roadkillgoldfish.com/texas-officials-upset-over-low-staar-scores/
1. Which of the following elements are ordered from least reactive to most reactive according to the Periodic Table?
A. Ar, Cu, Na
B. Na, Ar, Cu
C. Na, Cu, Ar
D. Ar, Na, Cu
2. Evidence of a chemical reaction can be determined by all of the following except?
A. Modifying the arrangement of atoms
B. Endothermic and exothermic reactions
C. Equal masses of reactants and products
D. No change in energy
3. Which of the following is a star with an absolute magnitude of +10 and a temperature of 25,000K?
A. Main Sequence
B. Super Giant
C. Giant
D. White Dwarf
4. Which of the following below is not considered evidence of plate tectonics?
A. The shape of continents fits together like a puzzle
B. Fossil comparisons exist along where the continents would fit together
C. The Mid-Atlantic Ridge shows where new crust is formed
D. There is a large amount of inland seismic activity
5. On December 22 of every year, the people in the southern hemisphere of the earth experience which event?
A. Summer Solstice
B. Winter Solstice
C. Spring Equinox
D. Fall Equinox
6. Our planet's oceans are experiencing climate changes, pollution, and overfishing. Which of the following answers is not a result of human activity?
A. Diminishment of coral reefs
B. Destruction of food webs
C. Increased population of all species
D. Degradation or total loss of wetlands
7. In mosses, eggs and sperm are produced by:
A. Spores
B. Sporophytes
C. Gametophytes
D. Zygotes
8. Which statement correctly states the work-energy theorem?
A. The change in kinetic energy of an object is equal to the work done by the object
B. The change in kinetic energy of an object is equal to the work done on an object
C. The change in potential energy of an object is equal to the work done by the object
D. The change in potential energy of an object is equal to the work done on an object
9. Balance the following reaction between sulfuric acid and aluminum hydroxide by filling in the correct stoichiometric values for each chemical.
_ H2SO4 + _ Al(OH)3 => _ Al2(SO4)3 + _ H2O
A. 3, 2, 1, 6
B. 2, 3, 1, 3
C. 3, 3, 2, 6
D. 1, 2, 1, 4
10. Which of the following situations would result in the generation of new crust?
A. Two crustal plates converge
B. Two crustal plates move apart
C. Two crustal plates slide past one another
D. A crustal plate is pushed down into the mantle
Grade 8 Science Answer Key