Science CBA 1 Review Part 2

A mixture can be created by -

• • combining two or more materials

• •  

  • melting a solid to form a liquid

• • blowing air through a straw

• pouring some water into a glass

What tool can be used to easily separate a mixture of iron and plastic paper clips?

• • Beaker

• • Strainer

• •  

  • Balance

• •  

  • Magnet

• All of the following objects produce sound energy EXCEPT –

• radio

• drum

• flashlight

• television

When students look at a computer screen, they are using what kind of energy produced by the screen?

• Light Energy

• Thermal energy

• Mechanical Energy

• Solar Energy

The picture shows the kind of pencil sharpener found in many classrooms.

Turning the handle of the pencil sharpener to sharpen a pencil is an example of using —

• Light Energy

• Mechanical Energy

• Electrical Energy

• Thermal Energy

What does MELTS stand for?

An object that has a definite shape

List two physical properties of the object (in picture)

• Solid & Round

• Liquid & Transparent

• Gas & no definite volume

• Gas & takes shape of container

Sometimes a burning candle will have wax dripping down the side. This happens because the heat of the flame –

• • uses some of the gases in the air

• •  

  • creates tiny air currents around the candle

     

• • causes water to collect on the candle

• • turns the wax of the candle to a liquid