S1U1 8th Grade Science Test Review

Which sentence is an example of how a scientist might use a model?

• A microscope is used to magnify a group of cells on a slide.

• The end of a slinky is moved vertically up and down to simulate a wave.

• A wrench is used to tighten a nut onto a piece of wood.

  
  

• A stopwatch is used to time the rate of a chemical reaction.

  
  

Which sentence is an example of how a scientist might use a model?

• Microscopes are used to magnify a group of cells on sets of slides.

  
  

• Marbles placed inside a hollow sphere are used to describe protons in a nucleus.

  
  

• A wrench is used to tighten a nut onto a piece of wood.

  
  

• Stopwatches measure the amount of time it takes for runners to complete a mile.

  
  

Tags

NGSS.MS-LS1-2

NGSS.MS-LS2-3

Why is the law of gravity an example of a universal law?

• Gravity exists only on the earth and the moon.

  
  

• Gravity exists for masses in a closed system only.

  
  

• Gravity exists between small masses in an open system only.

  
  

• Gravity exists between any two masses.

  
  

Tags

NGSS.HS-PS2-4

Which statement best defines a universal law?

• It is in effect some of the time.

  
  

• It operates only under specific conditions.

  
  

• It is in effect at all times.

  
  

• It changes over time.

  
  

A student conducts an experiment to test how the temperature affects the amount of sugar that can dissolve in water. In the experiment, she uses 100 milliliters of water in each trial and stirs for five minutes each time.

What is the independent variable?

• the amount of water

  
  

• the temperature of the water

  
  

• the amount of sugar

  
  

• the time stirred

  
  

Tags

NGSS.MS-PS1-4

A student conducts an experiment to test how the temperature affects the amount of sugar that can dissolve in water. In the experiment, she uses 100 milliliters of water in each trial and stirs for five minutes each time.

What is the dependent variable?

• the amount of water

  
  

• the temperature of the water

  
  

• the amount of sugar

  
  

• the time stirred

  
  

Tags

NGSS.MS-PS3-4

Which unit of measure is the correct SI unit to use to measure the length of a rope?

• yards

• meters

• feet

• inches

Which unit of measure is the correct SI unit to use in measuring the mass of a boulder?

• tons

• kilograms

• pounds

• ounces

A student conducts an experiment to test how the temperature of a ball affects its bounce height. The same ball is used for each test, and the ball is dropped from the same height each time. 

What is the independent variable?

• the type of ball

  
  

• the temperature of the ball

  
  

• the drop height of the ball

  
  

• the bounce height of the ball

  
  

Tags

NGSS.MS-PS1-4

A student conducts an experiment to test how the temperature of a ball affects its bounce height. The same ball is used for each test, and the ball is dropped from the same height each time. 

What is the dependent variable?

• the type of ball

  
  

• the temperature of the ball

  
  

• the drop height of the ball

  
  

• the bounce height of the ball