Unit 1 Review (Physical Science

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

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

  
  

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

  
  

• 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.

  
  

Tags

NGSS.MS-PS4-1

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

• A scientist uses a model to predict the stock market.
• A scientist uses a model to create a new recipe.
• A scientist uses a model to design a new car.
• Marbles placed inside a hollow sphere are used to describe protons in a nucleus.

  
  

Tags

NGSS.MS-PS1-1

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

• Gravity exists between any two masses.

  
  

• The law of gravity is a theory that has not been proven.
• The law of gravity is only relevant in outer space.
• The law of gravity only applies to Earth.

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NGSS.MS-PS2-4

Which statement best defines a universal law?

• A guideline that is often ignored in practice.
• A rule that only applies in specific situations.
• A theory that is subject to frequent changes.
• It is in effect at all times.

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?

• Temperature of the water

• Type of sugar
• Amount of water
• Time spent stirring

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 time spent stirring the water.
• The amount of sugar that can dissolve in water.
• The volume of water used.
• The temperature of the water.

Tags

NGSS.MS-PS3-4

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

• meter
• kilometer
• centimeter
• millimeter

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

• pound
• kilogram
• ton
• gram

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?

• Height from which the ball is dropped
• Material of the ball
• Surface the ball bounces on
• Temperature of the ball

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?

• Air pressure
• Drop height
• Ball material
• Bounce height