7th Grade Science : 7th Grade Science
Study concepts, example questions & explanations for 7th Grade Science
All 7th Grade Science Resources
Example Questions
Example Question #1 :Earth And Space Science
Select the theory that states that the Earth's outer shell is divided into several plates that glide over the mantle.
Layered Theorem
Mantle Theorem
Plate Techtonics
Outer Techtonics
Plate Techtonics
Plate Techtonics states that the Earth's outer shell is divided into several plates that glide over the mantle.
Example Question #1 :7th Grade Science
Select the outer most layer of the Earth.
Outer Core
Mantle
Inner Core
Crust
Crust
The outer most layer of Earth is the Crust. The diagram provided illustrates the Earth's layers.
Example Question #1 :Earth And Space Science
What type of rock could be made out of sand and shells?
Sedimentary
Igneous and Sedimentary
Igneous
Metamorphic
Sedimentary
Both sand and shells are small materials. A sedimentary rock is formed from small materials, such as sand and shells; thus, sedimentary is the correct answer.
Example Question #4 :Earth And Space Science
Select the main difference between the three types of rocks: sedimentary, metamorphic, and igneous.
The texture of the rocks
The age of the rocks
How the rocks are formed
Where the rocks can be found
How the rocks are formed
The main difference between the types of rocks is how the rocks are formed.
Sedimentary rocksare formed from small particles of materials, such as sand or pebbles.
Metamorphic rocksare formed from changes in heat and pressure under the earth's surface.
Igneous rocksare formed from magna cooling and hardening.
Example Question #1 :7th Grade Science
什么时候在图像provided represents a wavelength?
A
B
C
D
A
A wavelength is the length of a complete wave cycle, from one crest to the next crest or one trough to the next trough.
Point A is the length from one crest to the next crest; thus, point A represents a wavelength.
Example Question #2 :Physical Science
什么时候在图像provided represents a crest?
A
D
B
C
C
The crest of a wave is the upper most point that a wave rises up. Point C is at the upper most point of a wave.
Example Question #2 :7th Grade Science
什么时候在图像provided represents a trough?
A
B
D
C
B
The trough of a wave is the lowest most point that a wave falls downward. Point B is at the lowest most point of a wave.
Example Question #2 :7th Grade Science
什么时候在图像provided represents an amplitude?
B
A
C
D
D
The amplitude is the distance from rest to a crest or from rest to a trough. Point D represents the distance from rest to the trough; thus, point D is the correct answer.
Example Question #1 :7th Grade Science
What controls a cell's activities?
Nucleus
Nuclear membrane
Cell wall
Cell membrane
Nucleus
To answer this question correctly, we need to know the function of the following organelles:
Thecell membranecontrols movement of materials in and out of the cell, and acts as a barrier between the cell and the environment.
Thecell wallprotects the cell, and allows water, oxygen, and carbon dioxide into and out of the cell.
Thenuclear membranecontrols movement in and out of the nucleus.
Thenucleuscontrols the cell's activities.
Nucleus is the correct answer.
Example Question #2 :7th Grade Science
What protects the cell, and allows water, oxygen, and carbon dioxide into and out of the cell?
Cell membrane
Cell wall
Nucleus
Nuclear membrane
Cell wall
To answer this question correctly, we need to know the function of the following organelles:
Thecell membranecontrols movement of materials in and out of the cell, and acts as a barrier between the cell and the environment.
Thecell wallprotects the cell, and allows water, oxygen, and carbon dioxide into and out of the cell.
Thenuclear membranecontrols movement in and out of the nucleus.
Thenucleuscontrols the cell's activities.
Cell wall is the correct answer.
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