Mixtures compounds and/or elements mixed together but not bonded together heterogeneous mixture- Separation can be seen. Different throughout or chunky.

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Presentation transcript:

Mixtures compounds and/or elements mixed together but not bonded together heterogeneous mixture- Separation can be seen. Different throughout or chunky granite, orange juice with pulp, Italian dressing homogeneous mixture- No Separation can be seen. Even throughout milk and saltwater Solution really well mixed homogeneous mixtures

Breakdown of classification

Separating Mixtures Mixtures can be separated by chemical or physical means Separating Compounds compounds can ONLY be separated by chemical means (requires a chemical change)

Separating Elements atom is from the Greek word atomos, meaning not able to be cut. elements can NOT be separated by chemical or physical means. The only way to separate an atom is through a nuclear reaction.

Mass Volume and Density

What is matter? Matter is what the universe is made of. Matter is anything that has mass and volume. Examples include just about everything (any solid, liquid or gas). Example of things that are not matter include electricity, sound and light.

What is the difference between mass and volume? Mass- how much matter is present Measured in Kg, g and mg Volume- how much space something takes up Measured in mL, L and cm 3 Which weighs more a ton of bricks or a ton of feathers? Neither, they both have the same mass. However, the feathers will have a much higher volume.

The difference between mass and weight. Weight is the force of gravity pulling down on the mass of an object. Weight = mass x gravity and % of the time gravity is a constant (9.8 m/s 2 ) A normal scale will divide for you and give you your mass However there are differences

Weight is a force, it pulls in a definite direction. Weight is measured in Newtons (N) Weight changes with altitude. On the moon you would weigh 1/6 of what you do on Earth. Mass is inertia (resistance to change in motion) it has no direction. Mass is measured in kilograms (Kg). Mass never changes, unless you remove or add matter to the object.

How to measure volume. If it is a cubic solid, measure length. width and height and multiply them. l x w x h = v If it is a liquid, pour it in a graduated cylinder and read from the meniscus (the low point of the curve). water air meniscus ALWAYS PUT YOUR HEAD AT THE SAME LEVEL AS THE MENISCUS

Measuring an irregular solid first pour water into a graduated cylinder large enough to hold the solid, and read its volume. then place the solid into the water being careful not to spill any water. read the new volume. subtract the new volume from the old for the volume of the solid.

How to measure mass If it is a “nonmessy” solid, weigh it on a scale. If it is a liquid or messy (a powder, greasy etc.) get a weighing tray or beaker. weigh the empty weighing tray or beaker and record its mass. add the object to the weighing tray or beaker and weigh it and subtract the mass of the empty beaker.

Scale Rules Gently place objects on scale. Make sure the scale is clean. (wipe off excess powder) Make absolutely certain before you use it it reads 0.00 g