Chapter 9
Substances have a fixed composition, while the composition of __________ can vary.
What are mixtures?
Astronomers measure vast distances in space in ___________________.
What are astronomical units?
What process primarily releases oxygen into the environment?
What is photosynthesis?
What does fire need to keep it going?
What is oxygen?
Change in temperature, a release of light, a release of gas, a change in color or odor, and the formation of a solid from two liquids are all indicators that what has occurred?
What is a chemical reaction?
Solutions are mixed at the ____________.
What is atomic level?
True or False: Mercury has no atmosphere.
What is true?
What does all matter have?
What is mass?
The process that moves water across a
semipermeable membrane from high to low
concentrations is called ___________.
What is osmosis?
In a chemical reaction, atoms of __________ rearrange and form __________.
What are reactants and products?
_________________ is the amount of solute that is dissolved.
What is concentration?
The __________________ makes Venus the hottest planet.
What is greenhouse effect?
Planets orbit around ___________.
What are stars?
Weather patterns in the United States of America
generally travel from the ___________________.
What is West to the East?
Which type of reaction is the reverse of a decomposition reaction?
What is synthesis?
______________ is the maximum amount of a solute that can dissolve.
What is solubility?
A dwarf planet orbits a ____________.
What is a star?
What keeps planets of the solar
system in orbit around the sun?
What is gravitational force?
What is the boiling point of water?
What is 212 degrees F or 100 degrees C?
Balance the equation on the board
Answer will be revealed on the board
Acids form __________ ions in water and bases form ____________ ions in water.
What are hydronium ions (acids) and hydroxide ions (bases)?
What is the largest and smallest planet in our solar system?
Largest: Jupiter
Smallest: Mercury
Which of the following waves in the electromagnetic
spectrum has the longest wavelength?
What are radio waves?
A sheet of ice would float on a freshwater lake
because ice is ______________.
What is less dense than water?