Final Review Questions 1-28 Flashcards
What two things does matter have?
Mass and volume
What is mass?
How much stuff is inside a particular material.
Which is denser a one-inch block of gold or a one-inch block of wood?
The cube of gold
What are the three states of matter?
Solid, liquid, and gas
In which state of matter are molecules most active?
Gas
In which state of matter are molecules least active?
Solid
Which two states of matter do not have a particular form or shape but take on the shape of their container?
Gas and liquid.
What do we call the point at which a solid becomes a liquid?
Melting point.
What do we call the point at which a liquid becomes a gas?
Boiling point.
What temperature is the freezing point of water?
32 F
What temperature is the boiling point of water?
212 F
What is an atom?
The smallest particle of an element that still keeps the properties of that element.
What is an element?
A substance that contains only one kind of atom.
What is the charge of a proton?
Positive
What is the charge of an electron?
Negative
What is the charge of a neutron?
Neutral
What do we call a solid with a regular repeating arrangement of atoms?
A crystal.
Which kind of polymer is widely used because it is light, easy to shape and can be recycled and remolded into other things?
Plastic.
Which kind of reaction changes a substance into a different substance?
Chemical reaction
Which kind of reaction changes only the form or appearance of a substance?
A physical reaction
True or false: A base tastes like vinegar and corrodes metal?
False
What do we call a mixture in which the individual parts cannot be seen as separate?
Homogeneous mixture
What do we a call a mixture in which the individual parts can easily be seen?
Heterogeneous mixture
Which law states that objects at rest tend to stay at rest and objects in motion tend to stay in motion in a straight line unless acted upon by force?
Newton’s first law of motion.
Which law states that for every action there is an equal and opposite reaction?
Newton’s third law of motion.
True or False: Friction is a force that resists movement between 2 objects?
True
What does a lubricant do?
A substance that reduces friction.
What is the law of universal gravitation?
The law that tells us all objects are attracted to other objects according to their mass and distance.
