Science Msl

When a light bulb is lit, electrical energy is changed into light energy and

• chemical energy
• magnetic energy
• heat energy
• mechanical energy

Which form of energy is produced when a guitar string vibrates?

• chemical
• light
• magnetic
• sound

Why do some animals hibernate in the winter?

• to find food for their young
• to adapt to environmental changes
• to attract a mate
  
• to avoid predators
  

The function of a plant’s roots is to take in

• light and water.
• light and air.
• nutrients and water.
• nutrients and soil.

Which object placed at X would complete the circuit and light the bulb?

An incomplete electric circuit is shown below. The light bulb is not lit.

• magnet
• battery
• metal nail
• second light bulb

During winter, the white fur of an arctic fox blends in with the snow. This adaptation is called

• hibernation
• migration.
• camouflage
• movement

Lucy noticed that her coin collection had begun to tarnish. Some of the metal in the coins had begun to change color. The formation of tarnish is most similar to which of the following changes?

• shredding a piece of paper into hundreds of tiny strips
• dropping a dinner plate on the floor
• melting ice cubes in a glass of juice
• burning a piece of paper to ashes in a fireplace

When walking along an asphalt street after sundown, a person often feels heat coming off the pavement. The heat is moving from the asphalt to the person by

• conduction.
• convection.
• expansion.
• radiation.

Which is an example of kinetic energy?

• sitting at a desk reading a book
• lifting a book from the floor to the table
• holding a bag full of heavy books
• pushing against a large tree

When two animals live in the same area and depend on the same organism for food, they are

• competing
• decomposing
• germinatin
• hibernatin