Science test 2019

Which of the following is the best example of using mechanical energy to perform a task?

• Viewing an insect with a hand lens

• sharpening a pencil with a handheld sharpener

• boiling noodles in water on a stove

• listening to music with a solar-powered radio

All of the following tools are useful when investigating heat EXCEPT-

• a hot plate

• a Celsius thermometer

• a timing device

• a spring scale

Which tool is best to separate a solution:

• hot plate

• magnet

• balance

• filter

A Beaker contains a mixture of salt, sand, gravel, and iron filings. Which substance is soluble in water?

• salt

• sand

• iron filings

• gravel

When wires are connected to a battery and a lightbulb in a circuit, the lightbulb is lit. Which types of energy are produced by the battery and lightbulb?

• electrical and light

• sound and light

• electrical and sound

• all of these

Which of these could NOT be used to replace a wire in a circuit?

• iron nail

• bendable straw

• steel spoon

• aluminum foil

Does water reflect or refract light?

• Only refracts light

• Only reflects light

• Refracts and reflects light

• not here

Which object best reflects light?

• sealable bag

• shower curtain

• aluminum foil

• drinking glass

What happens when light strikes a dark, heavy object?

• Light is refracted

• The light passes through the medium

• Light is absorbed

• Light is reflected

Which Science tool could be used to reflect light?

• camera

• mirror

• prism

• hand lens