Science 8 Q3 Review

__________ properties are the characteristics of matter that can be seen or measured through direct observation.

• Chemical

• Physical

Color, melting point, density are all examples of ________ properties.

• Physical

• Chemical

Flammability, toxicity, and reactivity are all examples of _________ properties.

• Chemical

• Physical

The atomic number is equal to the

• number of protons

• number of neutrons

The mass number is equal to _______ + _______________.

• protons; protons

• protons; neutrons

• protons; electrons

• neutrons; electrons

In a neutral atom the number of protons must be equal to the number of ______

• electrons

• neutrons

Describe the energy transformation for a battery powered flashlight.

• chemical-electrical-light

• light-chemical-electrical

• mechanical-electrical-light

• light-mechanical-electrical

Which of these is an example of light energy transforming into chemical energy?

• electrical lamp

• stove

• apple tree

• toaster

What type of energy transformation takes place inside a motor?

• chemical-magnetic

• thermal-electrical

• gravitational-chemical

• electrical-mechanical

Which statement is the most correct?

• Electric currents and magnets exert a force.

• Electric currents exert a force but magnets do not.

• Neither an electric current nor a magnet exert a force.

• Electric currents do not exert a force but magnets do not exert a force.