Grade 7 Science- Heat and tempurature topic 4 Flashcards
1
Q
Expansion
A
A substance that grows/increases in volume.
Example: marshmallows heated in a microwave.
2
Q
Contraction
A
A substance that shrinks/ decreases in size or volume
Example: mountain bikes tires deflate during winter
3
Q
Particle model
A
temperature increases= particles moving faster and spreading out more(expand)
temperature decreases= particles slow down come closer together(contract)
4
Q
Pure substance
A
A pure substance is a type of matter that is made of only one kind of particle. Pure substances can exist as solid,liquid,gas.
5
Q
4th matter of state
A
Plasma- made at extreme temperatures(like those on the surface of the sun)
