Physical Science

Wade is comparing various materials. He is using the properties of size, texture, and magnetic attraction. Which types of materials are the most likely comparing?

• only solids

• only liquids

• solids and liquids

• liquids and gases

Stephanie filled a thermos with hot coffee. Then she added a sugar cube. She wants to make the sugar cube dissolve faster. Which of the following will most likely help the sugar dissolve faster?

• holding the thermos of coffee in her hands

• adding ice cubes to cool the coffee

• sitting the thermos on a table

• stirring the hot coffee

Xavier emptied out his piggy bank. He had a mixture of different kinds of coins. He wants to separate them by kinds of coins. What is the best property to use to separate the coins?

• size

• shape

• texture

• magnetic attraction

Navariah made a display showing chemical changes. Which of the following describes a chemical change caused by heating?

• water evaporating from a cup

• metal screws rusting

• bread dough baking

• water condensing

Alex created static electricity in two balloons. Which of the following explains why the balloons repel?

• Both balloons are made of the same material.

• Both balloons have opposite charges

• Both balloons have positive charges

• Both balloons are filled with the same amount of air.

Energy changes from one form to another. Which activity is an example of electrical energy changing to heat energy?

• using a toaster when making breakfast

• water in a pond being warmed by the sun

• rubbing your hands together to warm them

• toasting marshmallows over a wood-burning stove

Brayan creates an electrical circuit that has a switch as one of its parts. What would happen if Brayan changes the switch from closed to open?

• The light bulb would make a sound.

• The light bulb would glow brighter.

• The light bulb would stop glowing.

• The light bulb would start glowing.

Anahy classified objects as either conductors or insulators. She made this chart to organize and record her data.

______________________________________________________________

Conductors Insulators

paper clip rubber band

aluminum foil wooden block

steel nail bottle cork

wooden toothpick plastic spoon

Which item is not correctly classified?

• aluminum foil

• wooden toothpick

• paper clip

• wooden block

Amanda pushes a toy car to set it in motion. She calculates the speed by measuring how far the car goes in 15 seconds.

Which of these is most likely used to increase the speed of the car?

• Adding more mass and friction to the car.

• Pushing the car up the ramp.

• Pushing the car with a greater force.

• Take all the wheels off the car.

Andy pushes a 3 lb puppy in a wagon and pulls him around the block. What would most likely happen if he put a heavier dog in the wagon and used the same force?

• The wagon will not move as fast

• The heavier dog will create less air resistance

• The wheels on the wagon will turn more quickly

• The wagon will be able to make it around the block faster