Physical Science

Physical Science Review

By Chrissy Lenard

Multiple Choice

Fada watched her father boil some water in an enclosed container to make tea. She realized that this was an example of a physical change. Which property of water does NOT change when water boils in an enclosed container?

• Mass

• Shape

• Density

• Temperature

Multiple Choice

Dani adds 10 grams (g) of salt to a jar of water. She then adds 10 g of sand to a second jar of water. She covers and shakes both jars and sets them on the table for five minutes. The materials Dani used are shown below.

What should Dani expect to observe after those five minutes?

• Both the salt and sand dissolved in the water.

• Both the salt and the sand settled to the bottom of the jar.

• The salt settled to the bottom of the jar, and the sand dissolved in the water.

• The salt dissolved in the water, and the sand settled to the bottom of the jar.

Multiple Choice

Two balloons contain the same amounts of water, sugar, and yeast. Two other balloons contain the same amount of water, but have no sugar or yeast. The following picture shows the balloons. Which balloon would you predict will get bigger the fastest?

• Balloon 1

• Balloon 2

• Balloon 3

• Balloon 4

Multiple Choice

Energy is the ability to cause motion or change. Some students used heat energy in a science experiment involving water and salt as shown below. What changes first when heat energy is used in this experiment?

• Color of the water

• Temperature of the water

• Amount of salt in the beaker

• Amount of water in the beaker

Multiple Choice

Stephanie started pushing a bookcase across the room, as shown in picture 1. Then, she removed the books and continued pushing with the same force and direction, as shown in picture 2. How does removing the books affect the motion of the bookcase?

• The mass is decreased, making the bookcase move faster.

• The gravity is increased, making the bookcase move slower.

• The friction is increased, making the bookcase move slower.

• The mechanical energy is decreased, making the bookcase move faster

Multiple Choice

Electric circuits must be properly connected or electricity will not flow. Which of the following shows a properly connected circuit that would allow electricity to flow and light the bulb?

Multiple Choice

Isabelle classified some objects as conductors or as insulators. She made this chart to organize and record her data. Which item is classified incorrectly?

• Aluminum Foil

• Paper Clip

• Toothpick

• Wooden Block

Multiple Choice

Eric had papers spread all over his table while he was working on a project. When the air conditioner came on several of the papers slid off the table and fell to the floor.

What is the most likely explanation of why the papers moved when the air conditioner came on, and not before?

• The cooler air sank and took the papers along with it.

• The fan added enough energy to the air to push the papers.

• The air conditioner motor made the floor and the table shake.

• As dampness in the papers dried, they could slide more easily.

Multiple Choice

Four students recorded how long it took for 1 tsp. of sugar to dissolve in 1 cup of water. Their setups and results are shown below. Which of the following happened as the number of stirs increased?

• The speed of dissolving increased.

• The speed of dissolving decreased.

• The amount of sugar dissolved increased.

• The amount of sugar dissolved decreased.

Multiple Choice

    Carlos uses one golf ball to set another golf ball in motion. The following diagram shows how Carlos designs his experiment. Carlos releases the ball on the string from different heights. Each time, the first ball strikes the second ball, which then rolls down the track. Which force causes the first ball to swing downward?

•     a pull due to gravity

• a pull from the string

• a push from Carlos’s hand

• friction between air and the golf ball

Multiple Choice

    Richard is conducting an experiment to see how far a rubber ball will roll when he releases it at the top of an inclined plane.

Why does the ball speed up as it travels down the inclined plane?

•      The force of gravity pulls the ball down the inclined plane.

• The force of friction is reduced because the ball is rubber.

• The ball has less magnetic attraction to the plane as it travels.

• The ball has a greater mass as it travels faster.

Multiple Choice

  Philip is playing tug of war with Nancy. They both understand that to win the game of tug of war, one player must pull the flag over their opponent's line, but during this particular game, the flag tied to the center of the rope is not moving.

 

What is happening to the rope in this example?

• Philip is applying more force in one direction.

• Nancy is applying more force in one direction.

• Philip and Nancy are applying equal forces in the same direction.

• Philip and Nancy are applying equal forces in opposite directions.

Multiple Choice

Kimberly gets tired of waiting for her brothers to finish playing golf. She presses on the pedal of the golf cart and it starts to move.

 

Which of the following explains how the golf cart is able to move?

 

•     Mechanical energy from Kimberly's foot is transformed to electricity that moves the cart.

• Light energy absorbed from the Sun is transformed to electrical energy that moves the 

         cart.

• Sound energy created by the cart is transformed to heat energy that moves the cart forward.

• Chemical energy stored in the battery is converted into electrical energy and transformed to mechanical energy that moves the cart

Multiple Choice

Miguel is rolling a ball down a hill. This is an example of which form of energy?

•     chemical energy

• electrical energy

• mechanical energy

• thermal energy

Multiple Choice

   Maria roller-skates to the top of a hill and then starts rolling downward. What are the MAIN forces affecting Maria’s motion as she rolls down the hill?

 

• gravity and magnetism

• speed and friction

• friction and gravity

• push and pull