Evaluate 4th grade Physical Science part 1

Erica puts two objects near each other. She feels them pull toward each other. Which of the following explanations best explains why this happens?

• One pole has a magnetic field.

• Like poles are facing each other.

• One pole is stronger than the other.

• Opposite poles are facing each other.

Cora observes some items in her science kit. When she moves the rock from the kit, a paperclip inside the kit moves towards the rock. What causes the paper clip to move towards the rock?

• mechanical energy

• magnetic energy

• electrical energy

• magic

On a camping trip, Bryan notices that the needle of a compass always points north to south. Why does this happen?

• Earth has a magnetic field and the needle is magnetic.

• The sun makes the needle point north to south.

• Gravity makes the needle point north to south.

• The needle points toward the colder places.

Karen wants to know how two magnets behave when they are together. The magnets below show her investigation. What must be true of the two magnets shown?

• The two poles are the same poles.

• The two poles are opposites, south and north.

• The two poles are opposites, north and south.

• It is not possible to tell anything about the magnets.

Alexa has two different magnets. She wants to test which magnet is stronger. What test could she perform that would best show which magnet is stronger than the other magnet?

• Find a small block of wood and test which magnet will be attracted to it.

• Put the magnets together and test if the magnets will attract to each other.

• Set a nail on the table and test which magnet will attract to the same nail from a farther distance.

• Pick a different group of objects for each magnet and see which magnet attracts the most objects.

Magnets come in different shapes. Some magnets have a shape like the letter U or a horseshoe. How could you tell where the north-seeking pole is on a horseshoe magnet?

• Bring the magnet near some paper clips on a piece of paper.

• Bring the magnet near the pole of another magnet.

• Bring the magnet near any nonmagnetic material.

• Bring the magnet near a piece of paper.

Dorothy has a blue plastic set of alphabet letters that stick to her refrigerator. She decides to sort the letters using a physical property. Which of the following physical properties would be best for her to use?

• color

• hardness

• magnetism

• shape

During science class, the teacher displays a glass containing a liquid. The teacher says that the liquid is either water or colorless vinegar. What physical property would the students most likely use to identify that the liquid is vinegar?

• color

• mass

• odor

• volume

Cara places a group of objects on her desk. She wants to describe the object by using only one physical property. Which physical property is most likely similar for all of these objects?

• attraction to magnets

• hardness

• texture

• shape

Kim sees some one centimeter cubes in her classroom. She observes that some of the cubes float in water and some do not. Which of the following statements is true about all the cubes?

• Their shape is the same but their volume is different.

• Their mass is the same but their volume is different.

• Their volume is the same but their mass is different.

• Their volume is the same but their size is different.