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Misc. 7th Gr Science Review 3
Test Description: Multiple choice questions covering 7th gr Ky science content
Instructions: Answer all questions to get your test result.
1) Which statement about the atoms of a chemical element is TRUE?
A
The atoms of a chemical element do not break down in chemical reactions
B
The atoms of a chemical element can break down when exposed to an electric current
C
The atoms of a chemical element can break down when mixed with an acid
D
The atoms of a chemical element can break down when heated
2) Which of these never changes during a chemical change?
A
the total number of molecules
B
the total number of atoms
C
the colors of the reactants
D
the arrangement of atoms
3) Suppose an unbalanced force acts on an object. An unbalanced force can change
A
the speed but never the direction of a moving object
B
neith the speed nor the direction of a moving object
C
the direction but never the speed of a moving object
D
both the speed and direction of a moving object
4) Which of these do geologists consider a constructive force?
A
a tsunami sweeping away acres of marshland
B
a volcano blasting ash into the air
C
a glacier grinding stones into dust
D
a river carving out a valley in a plain of rock
5) Which of these statements is correct?
A
The moon revolves around the earth and the earth revolves around the sun.
B
The earth rotates around the moon and the moon rotates around the sun
C
The earth revolves around the moon and the moon revolves around the sun.
D
The moon rotates around the earth and the earth rotates around the sun
6) The tides are caused mainly by
A
the moon's gravity
B
the earth's rotation
C
the earth's winds
D
the moon's phases
7) The human body has levels of organization. Which is the MOST complex?
A
tissue
B
organ system
C
organ
D
cell
8) Which cell component can you see only in a plant cell?
A
mitochondrion
B
cell membrane
C
cell wall
D
nucleus
9) Genes code for inherited traits. Which BEST describes a gene?
A
a small protein molecule
B
a chromosome
C
a carbohydrate molecule
D
a section of a DNA molecule
10) In which rock type are you MOST LIKELY to find fossils and evidence of past climates?
A
sedimentary
B
metamorphic
C
granite
D
igneous
*select an answer for all questions
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