7th Grade Summer Review : Question Preview (ID: 10168)

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Natalie is trying to explain the solar system to her younger brothers. What three objects should she choose to best represent the sun, earth, and the moon?
a) A chair, a book, and a candle
b) Paper, a pencil, and a crayon
c) A basketball, a softball, and a table tennis ball
d) An apple, an orange, and an lemon

Children are trying to get supplies up into their tree house. The simple machine which would be most useful would be a
a) Pulley
b) lever
c) wheel and axle
d) screw

Which of the following simple machines makes up the base of a lightbulb?
a) wheel and axle
b) lever
c) pulley
d) screw

A knife or a chisel is an example of what type of simple machine?
a) an inclined plane
b) lever
c) wedge
d) pulley

5. You are boiling water on your stove next to a window. You notice water droplets on the inside of the window. This is an example of what kind of scientific investigation?
a) observation
b) experimentation
c) collecting speciemsn for analysis
d) none of these

Rollerblades are an example of what type of simple machine
a) a wheel and axle
b) an inclined plane
c) wedge
d) pulley

6. 7. Jeannie wanted to find out if cold water was more dense than warm water. She added red food coloring to a beaker of warm water and then used an eyedropper to add the warm red
a) Observation
b) Experimentation
c) Collecting specimens for analysis
d) None of these

What characteristic best describes what happens during a physical change?
a) Composition changes
b) Composition stays the same
c) Forms stays the same
d) Mass is lost

How can you change matter from one state to another?
a) By changing its container
b) By adding or removing heat
c) By dividing it in half
d) By changing its volume

Which of the following is an example of a physical change?
a) Painting a block of wood
b) burning charcoal
c) decomposing leaves
d) rusting nail

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