Science STAAR Review

What are positively charged particles found in the nucleus of an atom called?

• Neutrons

• Electrons

• Protons

• Photons

What is the charge of electrons?

• Negatively charged

• Positively charged

• Neutrally charged

• Variable charge

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What is the formula for calculating acceleration?

• Acceleration = (Final velocity - Initial velocity) / Time

• Acceleration = (Initial velocity - Final velocity) / Time

• Acceleration = Final velocity / Time

• Acceleration = (Final velocity + Initial velocity) / 2

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What is the term for a change in which one or more substances are converted into different substances?

• Chemical reaction

• Physical change

• Phase transition

• Chemical equilibrium

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

• Weight

• Volume

• Density

• Mass

What is a sign that a chemical reaction has occurred?

• Bubbles of gas appear

• The temperature remains constant

• The color of the substance stays the same

• The mass of the substance increases

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What is the charge of neutrons?

• Positive charge

• Negative charge

• No charge (neutral)

• Variable charge

What is the central region of an atom where its neutrons and protons are located?

• Nucleus

• Electron Cloud

• Orbital

• Shell

How do you calculate speed?

• Speed = Distance + Time

• Speed = Distance - Time

• Speed = Distance / Time

• Speed = Time / Distance

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What is the law of conservation of mass?

• Mass is neither created nor destroyed in a chemical reaction.

• Mass can be created but not destroyed in a chemical reaction.

• Mass can be destroyed but not created in a chemical reaction.

• Mass is only conserved in physical changes, not chemical reactions.

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