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Seventh Grade (Grade 7) Science Questions

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Grade 7 Waves and Sound
                is the bouncing off or turning back of light from a surface.
  1. Reflection
  2. Refraction
  3. Retraction
  4. Imaging
Grade 7 Waves and Sound
Blowing into an almost empty bottle produces                   .
  1. a high pitch sound
  2. no sound
  3. a low pitch sound
Grade 7 Human Reproduction
The male sex cell is the
  1. sperm.
  2. egg.
  3. testes.
Grade 7 Evolution
Species change over time through
  1. evolution.
  2. adaptation.
  3. extinction.
  4. genetic variation.
Grade 7 Earth's Layers
Put the layers of Earth in order from outside layer to inside layer.
  1. mantle, crust, core
  2. core, mantle, crust
  3. crust, mantle, core
  4. mantle, core, crust
  5. crust, core, mantle
Grade 7 Waves and Sound
The distance between E and H is called                .
Transverse Wave Anatomy
  1. a crest
  2. a wavelength
  3. the amplitude
  4. the frequency
Grade 7 Cell Structure and Function
What is the purpose of mitosis?
  1. reproduction
  2. growth
  3. replacement
  4. all of the above
Grade 7 Atomic Structure
An ion of the element carbon has a different number of                 .
  1. protons
  2. electrons
  3. neutrons
  4. all of the above
Grade 7 Heat Transfer
                    is a decrease in a material's volume when its temperature decreases.
  1. Thermal contraction
  2. Conduction
  3. Convection
  4. Radiation
Grade 7 Scientific Method
All the things in an experiment that must be the same to make the results fair are
  1. independent variables.
  2. dependent variables.
  3. controlled variables, or constants.
  4. controlled experiments.
Grade 7 Properties of Matter
All of the following are physical properties except                .
  1. color
  2. density
  3. melting point
  4. flammability
Grade 7 Cell Structure and Function
What is the system of membranes that modifies and packages proteins for export by the cell?
  1. nucleus
  2. mitochondria
  3. cell membrane
  4. Golgi apparatus
Grade 7 Respiration, Digestion, and Excretion
What is the purpose of the respiratory system?
  1. to break down food for energy and nutrients
  2. to facilitate the exchange of oxygen and carbon dioxide
  3. to provide response to stimuli in the world around us
  4. to provide structure and support for the body
Grade 7 Earth's Layers
The crust and the upper mantle together form the
  1. asthenosphere.
  2. mesosphere.
  3. lithosphere.
  4. inner and outer core.
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