Unit 1 - Explaining Physical Changes 1 Flashcards Preview

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Flashcards in Unit 1 - Explaining Physical Changes 1 Deck (27)
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1
Q

Particles

A

The smallest pieces of matter

2
Q

Intermolecular forces

A

The forces between particles in matter

3
Q

Malleable

A

Able to be bent without breaking

4
Q

Strength

A

The ability of a solid to withstand a force

5
Q

Hardness

A

A measure of how easy it is to scratch a solid

6
Q

Soluble

A

Able to dissolve in a solvent

7
Q

Conduct

A

Transfer of heat or electrical charge by passing on energy to nearby particles

8
Q

Alloy

A

Mixtures of metals

9
Q

Hypothesis

A

An idea that explains facts or observations and is the basis for experimentation (X depends on Y)

10
Q

Brownian motion

A

Movement of solid particles caused by collisions with liquid particles

11
Q

Kinetic theory

A

Theory that all matter is made up of particles

12
Q

Evidence

A

Information gathered in a scientific way which supports or contradicts a conclusion

13
Q

Viscosity

A

The ability of liquids and gases to flow

14
Q

Compressed

A

When particles are squashed together by a force

15
Q

Solubility

A

The mass of solute that dissolves in a solvent at a particular temperature

16
Q

Sublimation

A

When a solid turns straight into a gas without a liquid state

17
Q

Melting point

A

The temperature at which a solid changes state to a liquid

18
Q

Boiling point

A

The temperature at which liquid changes state to a gas

19
Q

Latent heat

A

The heat energy needed to change the state of a substance

20
Q

Evaporation

A

Change from a liquid to a gas a t the surface of a liquid

21
Q

Boiling

A

When a liquid changes state into a gas

22
Q

Surface area

A

The area of the outside surface of an object

23
Q

Thermal expansion

A

When particles in a solid or a liquid gain enough energy to occupy more space

24
Q

Atom

A

The basic building block of an element that cannot be chemically broken down

25
Q

Element

A

A substance made up of only one type of atom

26
Q

Compound

A

Two or more elements that are chemically joined together such as water (Hydrogen + Oxygen)

27
Q

Particle model

A

Used to explain the kinetic theory of solids, liquids and gases