Flashcards: Fundamentals of Chemical and Magnetic Science — 16 cartões

Chemical reactions — definition?

Processes where substances change into new substances.

Reactants — role?

Substances that undergo a chemical change.

Products — role?

Substances formed after a reaction.

Metal + acid — pattern?

Produces salt and hydrogen gas.

Physical change — example?

Melting ice or crushing chalk.

Chemical change — example?

Burning wood or rusting iron.

Law of conservation — form?

Mass remains constant in reactions.

Mass of reactants — equals?

Mass of products in a reaction.

Reaction types — main?

Combination, decomposition, combustion.

Magnetic poles — types?

North and South poles.

Like poles — do?

Repel each other.

Unlike poles — do?

Attract each other.

Magnetic field — region?

Around a magnet where forces act.

Field lines — direction?

From North to South pole.

Electromagnet — core material?

Soft iron nail.

Variables — in investigations?

Independent, dependent, and controlled variables.