Properties of Matter
Refer to page 64
The ability to dissolve in water
Solubility
Name three things that happen when a chemical change occurs.
Refer to page 69 and 70
A new substance is created, puts off a smell or odor
puts off light, puts off heat, changes color
Name two examples of a physical change
breaking glass, making lemonade, making a paper airplane
What does "Conservation of Matter" mean?
Refer to page 75
Matter cannot be created or destroyed
Name the four systems (spheres) of the Earth
Refer to page 13
Geosphere, Biosphere, Hydrosphere, Atmosphere
The ability to transfer or conduct heat or electricity
Conductivity
Name an scenario of a chemical change happening
burning log, baking cake, fireworks, baking soda mixed with vinegar, baking soda mixed with kool-aid
With a physical change, there is no new substance, no smell is produced, the substance can go back to its original form, no heat is produced. There is no reaction when substances are mixed.
If a piece of paper weighs half a pound and you make the piece of paper into a paper airplane, how much will the paper airplane weigh?
Half a pound
Why do volcanoes and earthquakes often occur together?
The ability to attract a magnet
magnetism
Name a change in matter that is not a chemical change, but a physical change
breaking glass, making lemonade, melting an ice cube
Explain how a rusted shovel is not a physical change
The rusted part of the shovel cannot become metal again. A new substance has been created.
What does a log turn into after it has been burned?
Refer to page 76
Ash, smoke, water vapor
Why can't we drink much of Earth's freshwater?
It is trapped in ice caps and glaciers.
How tightly packed the matter is
Density
What are three things that happen when a log is burning that are chemical changes?
There is a smell, the log becomes something completely different, heat is produced, light is produced.
Explain how making lemonade is a physical change
The lemon juice, sugar, and water can all be separated to their original forms. There is no smell, light, or heat produced. A new substance has not been created.
Explain why an ice cube weigh the same before and after it was frozen
The mass of the water and the ice cube are the same
Refer to page 71
Define weather and give one example of weathering
Refer to pages 30 and 31
The wearing away or breaking down of Earth's material by wind or water.
Examples: A boulder becoming an arch, the Grand Canyon, a rocky cliff becoming sand from the ocean waves.
Name at least three other properties of matter. Refer to page 64
smell, taste, texture, boiling point, melting point, color, hardness
When does a chemical change occur?
When two or more substances occur and their molecules react with each other
Name the physical changes that can happen to water if heated or put in the freezer and explain how the two scenarios are physical changes.
When heated, water turns to gas. When put in the freezer, water turns to ice. They are physical changes because in both cases the gas and the ice cube can be turned back into water.
Which weighs more, 5 pounds of cookie dough or the 5 pounds of cookie dough made into cookies.
They both weigh the same
Define erosion and give one example of erosion
The movement of Earth's materials from one place to another after it has been weathered.
Examples: water carrying away soil, wind blowing away sand