Science-Texas Coach-Chapter 2 Review

Which kind of energy do you use to run a TV?

• light

• sound

• electrical

• thermal

Which part of an electrical circuit starts and stops the flow of electricity?

• battery

• light bulb

• wire

• switch

The drawing below shows the light ray passing from the air through a piece of glass and back into the air. Which word describes what is happening to the light ray shown?

• absorption

• refraction

• reflection

• bouncing

Which picture shows a circuit that will cause the light bulb to lightB

• A

• B

• C

• D

A student is planning an experiment that tests the effect of gravity on different objects. Which of the following MOST LIKELY describes a step in the experiment?

• measure the time it takes to lift each object 1 meter

• measure how far a magnet can move each object

• measure the volume of each object

• measure the force needed to lift each object 1 meter

Which sentence about heat is true?

• heat always moves from objects that are cooler to objects that are warmer

• heat always moves from objects that are warmer to objects that are cooler

• heat sometimes moves from objects that are cooler to objects that are warmer

• heat does not usually move

A student conducted an experiment to test whether two objects made of unknown materials are conductors or insulators. The student attached each object to a circuit. The two circuits included identical batteries, bulbs, and wires. Which statement is true?

• the experiment is not good because it included more than one kind of material

• the experiment is not good because it tested unknown materialsw

• the experiment is good because it tested more than one variable

• the experiment is good because it tested one variable

A magnetic field forms around an iron nail when you

• wrap loops of wire around the nail and pass electricity through the wire

• wrap loops of wire around the nail

• place the nail near a battery

• wrap plastic around the nail and heat the nail and plastic

Antony van Leeuwenhoek used lenses to make scientific discoveries. What did the lenses do that made them useful?

• absorbed light

• reflected light

• blocked light

• refracted light

Which would you use a spring scale to measure?

• the amount of matter that makes up an object

• how far an object moves in a certain amount of time

• the force of gravity on an object

• how much space an object takes up