STAAR Review for Science

A clear liquid from a flask is poured into another clear liquid in a beaker. Which of the following results of this procedure would indicate a new substance was formed?

• The level of the substance in the beaker is higher after the other liquid is added.

• A yellow solid forms and then settles to the bottom of the beaker.

• Small white crystals are left behind in the flask that held the first liquid.

Tags

NGSS.MS-PS1-2

Which liquid is the least dense?

• Oil

• Water

• Syrup

• Plastic bottle

What is the acceleration of a 50 kg object pushed with a force of 500 newtons?

• 100 m/s²

• 25,000 m/s²

• 10 m/s²

• 25 m/s²

Tags

NGSS.MS-PS2-2

Forces that have a net force of zero 

• Balanced force

• Unbalanced force

What is the term for the movement of particles from an area of higher concentration to an area of lower concentration?

• Osmosis

• Diffusion

• Active transport

• Endocytosis

What is the primary function of the chloroplasts in plant cells?

• To break down sugar molecules to release energy

• To store water and nutrients

• To capture light energy and convert it into chemical energy

• To control the entry and exit of substances in and out of the cell

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-6

Which of the following is NOT a renewable resource?

• Solar energy

• Wind energy

• Coal

• Hydroelectric power

What type of symbiotic relationship benefits one organism without harming the other?

• Mutualism

• Commensalism

• Parasitism

• Predation

Which of the following is a chemical change?

• Dissolving salt in water

• Boiling water

• Burning wood

• Melting ice

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the term for the amount of matter in an object?

• Weight

• Density

• Mass

• Volume