What PPE can you see in the picture ?
• Safety goggles • Mask • Ear plugs / hearing protection • Safety gloves • Closed-toed shoes • Hair net / helmet • Lab coat
Can you guess what the symbolsmean?
Highly flammable
Can you guess what the symbolsmean?
CORROSIVE: Substances that attack and destroy living tissues, including the eyes and skin
Can you guess what the symbols mean?
TOXIC: Can cause death when swallowed,breathed in or absorbed through the skin
What is independent variables?
Independent variable: A factor that is changed by the experimenter on purpose
What is dependent variables?
A factor that may change as a result of changes made to the independent variable
What is control variables?
The variable(s) in an experiment that is always the same
What is an element?
An element is any substance made of only one type of atom.
What is a compound?
A compound is a substance formed when two or more chemical elements are chemically bonded together.
What is a mixture?
A mixture is made when two or more substances are combined, but not chemically bonded
Physical properties of metals?
Lustrous (shiny) • Good conductor of electricity • Solids with a high melting point • Malleable (can be shaped) Ductile (can be stretched into wires) • Opaque
Physical properties of non-metals?
Dull (not shiny) • Insulators(poor conductor of electricity) • Substances with low melting point • Brittle when solid(breaks easily) Non-ductile • Transparent
In the periodic table, which wow call " period"? How many periods the table?
The horizontal rows are called periods, there are 7 periods in the periodic table.
