Science Practice 2

Tim put one thermometer in the sunlight and one thermometer in the shade. What was he doing when he wrote down the temperature reading on each thermometer?

• recording data

• identifying patterns

• analyzing data

• displaying results

What process in the water cycle changes liquid water to water vapor?

• freezing

• melting

• condensation

• evaporation

When water is heated to 100 degrees Celsius, it begins to boil. some of the water begins to escape as steam. Which best describes what has happened to the water?

• its mass has changed.

• Its state has changed.

• Its density has increased.

• its temperature has decreased.

Which of the following will not dissolve in water?

• salt

• sand

• sugar

• vinegar

Which is an example of a physical change?

• Water boiling

• popping popcorn

• burning paper

• making pancakes

Margarita has built a simple circuit with a switch to open and close the circuit. When the circuit is closed, the light bulb lights up. What will happen if Margarita removes the switch and connects the wires on either side of the switch to each other?

• Energy will flow form the bulb to the battery

• The bulb will light up

• The battery will die

• The light bulb will remain dark.

Duane left his bicycle outside in the rain for several days. He notices some spots on the bicycle's iron frame have changed color from silvery-gray to reddish-orange. these spots are also rough to the touch. The rest of the frame is smooth. Which statement best describes what has happened?

• The water chemically reacted with the iron to form a new compound called rust.

• The water cooled the iron, which caused it to become rusty.

• The water coated the iron and cooled to form a reddish-orange solution called rust.

• The water eroded the outer layer of the iron to expose the rust underneath.

Haley used wires, light bulbs, and batteries to make four electrical circuits. Which circuit creates a complete path so the light bulbs will light up?

• 
• 
• 

What types of energy does the Sun transmit to Earth?

• nuclear energy and magnetic energy

• sound energy and mechanical energy

• heat energy and light energy

• hydroelectric energy and chemical energy

Lisa left her flashlight on while she went in the living room for a moment. When she returned, she noticed the flashlight felt warm when she picked it up. What best explains the reason the flashlight was warm?

• Lisa's hands got cold while she was in the living room.

• Lisa left the flashlight near a source of heat.

• The flashlight produces heat as well as light.

• The battery in the flashlight is not working correctly.