STAAR Science Review

I am ductile - I can be drawn into wires.

• Metals

• Nonmetals

• Metalloids

Answer explanation

Metals are ductile, meaning they can be drawn into wires. This property is characteristic of metals, while nonmetals and metalloids do not exhibit this behavior.

Tags

NGSS.MS-PS1-1

I am a semi-conductor

• Metals

• Nonmetals

• Metalloids

Answer explanation

Metalloids are elements that have properties of both metals and nonmetals, making them suitable as semiconductors. Metals are good conductors, while nonmetals are poor conductors, so the correct choice is metalloids.

Tags

NGSS.MS-PS1-1

What is the unit to measure force?

• Kilogram

• Meter

• Pounds

• Newton

Answer explanation

The unit to measure force is the Newton, which is defined as the force required to accelerate a one-kilogram mass by one meter per second squared. Other options like kilogram and meter measure mass and distance, respectively.

A ____________ is a push or a pull on an object.

• friction

• force

• magnet

• gravity

Answer explanation

A force is defined as a push or pull acting on an object. Friction, magnet, and gravity are types of forces, but the term that directly fits the definition in the question is 'force'.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which liquid is the least dense?

• Oil

• Water

• Syrup

• Plastic bottle

Answer explanation

Oil is less dense than both water and syrup, making it the least dense liquid among the options provided. This is why oil floats on water.

Tags

NGSS.MS-PS1-2

• 4N 
• 6N 
• 10 N 
• 14 N 

Tags

NGSS.MS-PS2-2

A (a)   changes the form or shape of the substance. An example would be (b)   .

A (c)   changes what the substance is. An example would be (d)   .

• boiling water

• burning wood

• chemical change

• physical change

Tags

NGSS.MS-PS1-4

change occurs when a substance changes in appearance, such as dissolving. change occurs when a new substance is formed, with evidence being precipitate formation.

• Physical

• Chemical

• Electrical

Tags

NGSS.MS-PS1-2

A property that can be used to identify an object or substance is called a (a)   . Density is a (b)   property. It is due mostly to how (c)   the molecules or atoms in an object are.

• property

• physical

• close

• big

• chemical

I could be shiny OR dull

• Metals

• Nonmetals

• Metalloids

Answer explanation

Metalloids can exhibit properties of both metals and nonmetals, making them shiny or dull. This characteristic distinguishes them from pure metals, which are typically shiny, and nonmetals, which are usually dull.