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Classifying Matter..
Physical Science Unit/Fernan Grade 5
Question | |
---|---|
The number of elements... | over 100 |
The particles of an atom that are found outside the nucleus... | electrons |
2 or more atoms joined together...the smallest unit of many substances... | molecule |
a new substance made up of atoms of different elements joined together to form a molecule | compound |
a compound made of iron atoms and oxygen atoms | iron oxide or rust |
a compound made of sodium and chlorine | salt |
a kind of mixture in which substances break up into their most basic particles that are too small to be seen and spread evenly through another substance | solution |
lemonade is an example of a special kind of mixture... | solution |
a physical property which describes how much a substance will stretch... | elasticity |
this kind of property describes how substances can be observed with the senses (color, shape, texture, odor, magnetism, melting point, state of matter, etc...) | physical property |
one of the new substances that forms after wood combines with oxygen (when wood burns) | ash |
this kind of property describes how a substance reacts with other substances, what a substance acts like, what happens when a substance changes. | chemical property |
this kind of property helps you know the difference between the element GOLD and the compound PYRITE (iron sulfide) | chemical property |
a lettuce, tomato, and cucumber salad is an example of a... | mixture |
2 or more substances mixed together...but can be separated... because their atoms are not combined | mixture |
a chart that classifies elements by their properties | periodic table of elements |
cake baking is an example of... | chemical change |
apples turning brown in the air is an example of... | chemical change |
tomato ripening is an example of... | chemical change |
H2O in the solid state of matter | ice |
H2O in the liquid state of matter | a puddle of liquid water |
H2O is the symbol for a molecule of... | water: 2 atoms of hydrogen (H) and 1 atom of oxygen (O) |
this liquid is combined with baking soda to produce carbon dioxide, water, and basic salt | vinegar |
Elements are arranged by similar properties or “groups.” The “groups” on the periodic table are found in... | columns (up ↑ and down ↓ ) |
the particle in an atom that has a (+) positive electrical charge | proton |
the particle in an atom that has a (-) negative electrical charge | electron |
an atom of an element has the same number of these particles... | protons and electrons |
this new material made of a mixture of calcium and phosphate | “bone cement” |
temperature a substance will melt or freeze... | melting point |
has mass and takes up space... | matter |
iron filings and powdered sulfur... | a mixture |
a chemical property of wood... | wood can burn in the presence of oxygen |