Less1

Question 1

A _______ is one of the different forms in which matter can exist, such as solid, liquid, or gas.

Answer 1

state of matter

Question 2

_______ is the scientific study of the composition, structure, properties, and reactions of matter.

Answer 2

Chemistry

Question 3

When you mix sugar in water, the sugar will _______ and become part of the water.

Answer 3

dissolve

Question 4

When water is heated, it will _______ and turn into steam.

Answer 4

evaporate

Question 5

As a gas cools, it can contract and _______ in volume.

Answer 5

expand

Question 6

The _______ of water is 0°C, the temperature at which it freezes and becomes a solid.

Answer 6

freezing point

Question 7

_______ are a state of matter in which particles are spread out and move freely, filling any container.

Answer 7

Gases

Question 8

A(n) _______ in a substance can affect its properties, such as the presence of dirt in water.

Answer 8

impurity

Question 9

_______ can flow and take the shape of their container, and their particles are close together but can move past each other.

Answer 9

Liquids

Question 10

_______ is anything that has mass and occupies space.

Answer 10

Matter

Question 11

The _______ of ice is 0°C, the temperature at which it melts and turns into water.

Answer 11

melting point

Question 12

A _______ is a combination of two or more substances that retain their individual properties.

Answer 12

mixture

Question 13

A _______ is the smallest unit of a substance, such as an atom or molecule.

Answer 13

particle

Question 14

The _______ of a substance refers to whether it is a solid, liquid, or gas at a particular temperature.

Answer 14

physical state

Question 15

_______ is the force exerted by gas molecules when they collide with the walls of a container.

Answer 15

Pressure

Question 16

A _______ is a material made up of only one type of particle, such as an element or a compound.

Answer 16

pure substance

Question 17

_______ have a fixed shape and volume because their particles are tightly packed and vibrate in place.

Answer 17

Solids

Question 18

The _______ is the substance that is dissolved in a solution, like salt in water.

Answer 18

solute

Question 19

A _______ is a homogeneous mixture in which a solute is completely dissolved in a solvent.

Answer 19

solution

Question 20

Water is often a common _______ that dissolves substances to form solutions.

Answer 20

solvent

Question 21

The process of a solid turning directly into a gas without becoming a liquid is called _______.

Answer 21

sublimation