Science CBA Review Units 1-4

Science CBA Review Units 1-4

by Jennifer Flores

Multiple Choice

The diagram shows how 80°C water changed temperature when equal amounts were placed in four different cups that were left out on a counter for two hours. Use the diagram to answer the question.

Which cup kept the temperature of the water the warmest for the two-hour period?

• Glass Cup

• Metal Cup

• Plastic Cup

• Foam Cup

Multiple Choice

The diagram shows an electrical plug with a cord that has been cut. Use the diagram to answer the question.

Which parts of the electical plug will insulate against heat loss and will not conduct electricity well?

• D only

• A only

• C and D

• B and C

Multiple Choice

The chart shows the densities of three different liquids.

Which illustration correctly shows how these liquids would appear if they were poured into a cylinder?

Multiple Choice

The picture below shows a mixture of water, sugar, and sand, which has settled in a glass beaker after it was stirred for a few minutes.

How could the water be separated from the mixture, so the beaker only has sugar and sand left?

• Filter the mixture, causing the sugar and sand to get caught but not the water.

• Heat the mixture, causing the water to evaporate.

• Stir the mixture, causing the water to move above the sugar and sand.

• Boil the mixture, causing the water to be destroyed.

Multiple Choice

 Keung had a box of metal buttons and emptied them into a bowl. Later, his mother wanted to use the bowl for cooking. Without looking, she poured a cup of water into it. Which of the following ways would NOT be effective for removing the buttons from the water without touching the mixture?

• Running a magnet through the mixture.

• Straining the mixture.

• Boiling the mixture.

• Placing the mixture in the freezer.

Multiple Choice

Mr. Johnson is teaching his students about mixtures. He decides to mix sand and iron filings to see whether his students can determine the best way to separate the iron from the sand. The best way for Mr. Johnson's students to separate this mixture is by —

• adding water to the mixture.

• sifting the mixture.

• shaking the mixture.

• running a magnet through the mixture.

Multiple Choice

Arturo mixed a cup of a red powdered fruit drink mix with 2 liters of water in a pitcher. What happened to the fruit drink mix and the water?

• The drink mix dissolved, and the water became red and sweet.

• The drink mix became a solid and sank to the bottom of the pitcher.

• The drink mix floated to the top of the pitcher and remained in clumps.

• The drink mix chemically reacted with the water and created a new substance.

Multiple Choice

Which of the following is an example of a physical change?

• Leaves burning

• Plant decaying

• Ice Melting

• Nail Rusting

Multiple Choice

Luz mixed a cup of sugar with a cup of milk in a pitcher.  What happened when she mixed the sugar with the milk?

• The sugar dissolved, and the milk became sour.

• The sugar dissolved, and the milk became sweet.

• The sugar evaporated and left the milk in the pitcher.

• The sugar floated on the surface of the milk in the pitcher.

Multiple Choice

A solar panel on top of a house converts light energy into electrical energy. The electrical energy can be used to -

• reduce the use of appliances in the house.

• buy appliances for the house.

• remove appliances from the house.

• power appliances in the house.

Multiple Choice

These students are using thermal energy in a science experiment.

The thermal energy is -

• heating the substance in the test tube.

• cooling the substance in the test tube.

• measuring the substance in the test tube.

• shocking the substance in the test tube.

Multiple Choice

A jackhammer moves up and down to break up concrete.

What type of energy does the jackhammer use to break up the concrete?

• Sound

• Mechanical

• Thermal

• Electrical

Multiple Choice

The picture shows Matthew listening to the radio.

This means that the electric current from the house's power source has -

• reached Matthew's radio through the cord.

• reached Matthew's radio through the air around the radio.

• reached Matthew's radio through the glass of water on the desk.

• reached Matthew's radio through the desk.

Multiple Choice

A circuit is shown.  

What is most likely to happen in this circuit?

• The lightbulb is producing only light.

• The lightbulb is dark and cool.

• The lightbulb is dark but is producing heat,

• The lightbulb is producing light and heat

Multiple Choice

A computer is connected to an electrical outlet through a power cord. What happens when the computer is turned on?

• The electrical current passing to the computer can produce heat, light, and sound.

• The electrical current passing to the computer can produce heat.

• The electrical current passing to the computer can produce only heat and sound.

• The electrical current passing to the computer can produce only light and sound.

Multiple Choice

Which describes how light travels in air?

• In a circular motion

• In a straight line

• In a zigzag pattern

• In a curved path

Multiple Choice

Crystal stands in front of a mirror to see her reflection. If the arrows in the diagrams below represent light, which diagram represents the way light travels to create Crystal's reflection?

Multiple Choice

During a storm, the power went out at Sarah's house. Worried about her pet fish, Sarah used a flashlight to check on it. The diagram shows what she saw.

What property of light did Sarah observe?

• Light is a form of energy that can generate heat.

• Light changes direction when it passes through one kind of matter into another.

• Light travels at a speed of 186,000 miles per second.

• Light can be absorbed by matter and transformed into heat.