sciences exam

Electrical Charges

Positive objects attract negative objects, positive repels positive, and negative repels negative.

Short Circuit

Danger prevented by a fuse or breaker in a circuit.

Series Circuit

Current is the same at every point; if one component fails, the circuit is interrupted.

Bioaccumulation

Substance concentration increases as it moves up the food chain.

Black Hole

End state of a massive star.

Fusion

Process by which the sun produces energy.

Isotopes

Same protons but different neutrons.

Ionic Compound

NaCl is an example with a metal and non-metal.

Molecular Bonds

Result from electron sharing between atoms.

Noble Gas

Neon belongs to this group.

Alkali Metals

Group 1 elements like Fr with 1 valence electron.

Density Calculation

Formula D = mass/volume used to find density.

Energy Calculation

Formula E = Power x Time for energy calculation.

Trophic Levels

Producers receive the most energy in an ecosystem.

Ozone Layer

Protects from harmful rays.

Circuit Components

V = Voltage, R = Resistance, I = Current.

Parallel Circuit

Multiple paths for electricity flow.

Resistance

Occurs when electrons slow down, leading to overheating.