Physical/ Chemical change? breaking a window
physical
A characteristic of matter that allows it to change to something new is a chemical ________ (property/ change)
chemical property
Physical/ Chemical Property: boiling point
physical
Physical/ Chemical change? frying a hamburger
chemical
Natural/ Synthetic Material: nylon
synthetic
Natural/ Synthetic Material: cement
synthetic
True/ False: Synthetic materials have undergone chemical reactions.
True
Physical/ Chemical change? burning paper
chemical
Physical/ Chemical change? a peeled banana turns black
chemical
?
Add another hydrogen atom to the product molecule that has one hydrogen atom
Physical/ Chemical Property: ability to reach with oxygen
chemical
True/ False: Matter can be classified based on chemical properties.
True
True/ False: Malleability is a physical property.
True
Physical/ Chemical Property: melting point
physical
Physical/ Chemical change? melting wax
physical
Physical/ Chemical change? bending a pop can
physical
True/ False: Synthetic materials are obtained directly from nature.
False
True/ False: The state of matter is a physical property.
True
Physical/ Chemical change? dew evaporating from grass
physical
True/ False: Chemical reactions can eithe release more energy that they absorb or absorb more energy than they release, depending on the reaction.
True
True/ False: Energy is needed to break bonds in chemical reactions.
True
True/ False: When a substance undergoes a physical change, its identity does not chage.
True
Any physical matter that is obtained or made from plants, animals, or the group without undergoing a chemical process is called a natural material.
True
Physical/ Chemical change? freezing water
physical
The model represents one molecule of hydrazine. The black spheres represent nitrogen, the white spheres represent hydrogen. Based on this model, what is the atomic composition?
2 atoms of nitrogen and 4 atoms of hydrogen
True/ False: Energy is neither created or destroyed.
True
Physical/ Chemical Property: flammability
chemical
Natural/ Synthetic Material: wood
natural
Physical/ Chemical Property: combustibility
chemical
True/ False: Temperature is the average kinetic energy of a substance.
True
A combustion reaction occurs between one molecule of methane (CH4) and two molecules of oxygen (O2). How many atoms of carbon, hydrogen, and oxygen make up the products for this combustion reaction?
1 carbon, 4 hydrogen, and 4 oxygen
?
solid & liquid
Physical/ Chemical Property: ability to react with an acid
chemical
Physical/ Chemical change? milk sours
chemical
Physical/ Chemical change? dissolving sugar in to water
physical
Physical/ Chemical Property: density
physical
True/ False: As a car speeds up, its kinetic energy decreases.
False
Physical/ Chemical change? evaporating of mud puddle
physical
Physical/ Chemical change? mashing potatoes
physical
The state of matter of a material depends on its ___________.
temperature
Physical/ Chemical Property: ability to be attracted by a magnet
physical
A change in __________ is a sign of energy being used in a chemical reaction.
temperature
Natural/ Synthetic Material: polyester
synthetic
True/ False: Energy is the ability to do work.
True
True/ False: Density is an example of a chemical property.
False- physical property
True/ False: The properties of synthetic materials are different from the natural materials from which they are made because they have undergone a chemical process.
True
True/ False: Shape is a physical property.
True
Physical/ Chemical Property: when a log burns in a fire
chemical (new substances are formed)
True/ False: Particles of matter are always in motion.
True
Physical/ Chemical Property: a characteristic of matter that allows it to change to something new
chemical
Physical/ Chemical Property: ability to dissolve in water
physical
Physical/ Chemical change? lighting a match
chemical
Physical/ Chemical Property: solubility
physical
Which material would you choose to make a tool that has to be strong and withstand very high temperatures? (plastic, wood, metal, or rubber)
metal
What is the law of conservation of mass?
The mass before a reaction is the same as the total mass after a reaction.
True/ False: Potential energy is the energy of motion.
False
What is the difference in potential and kinetic energy?
Potential energy is stored energy. Kinetic energy is energy of motion.
True/ False: Mass is a chemical property.
False- physical property
True/ False: Synthetic materials have only negative effects on the environment.
False
What is the formula for density?
D= m/v
Physical/ Chemical Property: oxidation (the ability to react with oxygen)
chemical
True/ False: Synthetic materials have no similarity to materials in nature.
False
Natural/ Synthetic Material: cotton
natural