Science 2023 End of Year Review

Solids can be described as having TWO of the following properties:

• particles that move freely

• definite volume

• definite shape

• takes shape of container

If a coin and a cork are placed in a tub full of water what will happen?

• F. The cork will float, and the coin will sink

• The coin will float, and the cork will sink.

• Both will float on top of the water

• They will both sink to the bottom of the tub.

Solutions are a type of mixture and share many similarities with other mixtures. One way that solutions may differ from other mixtures is..

• solutions may change their physical properties while other mixtures keep their physical properties.

• solutions from new substanves while other mixtures do not form new substances

• asolutions re a mixture of only two substanes while other mixtures can mix 3 or more substances

• Solutions are not easily separated while ,ixtures are easily separated.

Which statementdoes NOT accurately represents thermal energy?

• Thermal energy can be transferred from one object to another.

• Thermal energy can cause a change in the state of matter.

• Humans can detect thermal energy with their eyes.

• An example of thermal energy can include boiling water.

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

• chemical

• sound

• light

• electrical

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Which of the following is an important safety practice during a lab investigation of thermal energy?

• Using insulated gloves when handling heated beaker.

• Making sure your hands are dry when plugging in a sound recorder.

• Remembering not to look directly at the Sun while investigating shadows

• Informing the teacher of a broken graduated cylinder

Which is the best conductor?

• wood

• plastic

• metal

• paper

8. When water freezes and expands in the crack pictured below, the crack will-

• keep its shape

• disappear

• get wider

• ne narrower

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How is a magnet helpful to a construction worker that dropped nails and bolts?

• gravity will pick up the nails

• friction will push away nails and bbolts

• The magnet will pick up the nails

• The magnet will pull the nails and bolts towards it

Which force causes a bicycle to move forward?

• Gravity pulling the bike down to the ground

• Pushing the petals

• Pulling the pedals

• Magnetism between the wheels and pedals.