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(element/compound/mixture) Oxygen gas
element
(element/compound/mixture) carbon dioxide gas
compound
(element/compound/mixture) air
mixture
(element/compound/mixture) mineral water
mixture
(element/compound/mixture) distilled water
compound
Name the elements present in the compound sodium chloride.
sodium and chlorine
at 20 degree Celsius, most metals are . . . . . but non-metals will be found in all three . . . .
solid; states
metals are usually . .. . . dense than non-metals
more
Give three physical properties of metals.
high melting points. good conductors of electricity. good conductors of heat. high density. malleable. ductile.
Give three physical properties of non-metals
Poor conductors of electricity and heat. Non-Ductile metals. Brittle solids. Maybe solids, liquids or gases at room temperature. These are not sonorous. Transpa
we can pull or push an object. when we do this, we are making a ____ act on the object. A force from one object can act on another object even if the objects are not ____. For example the Sun pulls on the Earth across empty space because _
force; touching; gravity
The force of attraction between all objects with mass is due to _____
gravity
Two solid objects rubbing against each other experience the force of _____
friction
an object moving through the atmosphere is slowed down by the force due to ______
air resistance
(before/after/reflected/stopped) an echo is caused when a sound is ____. The echo reaches the listener _____ the original sound.
reflected; after
