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What is matter? Bellwork: Put a check next to each item on the sheet that you believe to be matter.

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Presentation on theme: "What is matter? Bellwork: Put a check next to each item on the sheet that you believe to be matter."— Presentation transcript:

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2 What is matter? Bellwork: Put a check next to each item on the sheet that you believe to be matter.

3 Notes

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5 How to Measure MASS MASS – the amount of MATTER in an object; measured in grams (gm) Triple Beam Balance

6 Mass- digital scale

7 How to Measure VOLUME (Liquid Volume) – The amount or liquid; measured in milliliters (ml) Graduated Cylinder

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10 A meniscus is the curve of the surface of the water in a graduated cylinder. A meniscus is the curve of the surface of the water in a graduated cylinder. Water "sticks" to the walls of the graduated cylinder, but only on the sides and not the middle. Water "sticks" to the walls of the graduated cylinder, but only on the sides and not the middle. When you look at the surface, the water level is not straight – it’s curved like a smile. When you look at the surface, the water level is not straight – it’s curved like a smile.

11 Measurement should be at the BOTTOM of the meniscus. Measurement should be at the BOTTOM of the meniscus. Read the meniscus at eye level in to get an accurate reading. Read the meniscus at eye level. Read the meniscus at eye level in to get an accurate reading. Read the meniscus at eye level. Read the volume here

12 Volume of a regular solid object To measure the volume of a regular solid object (a cube or rectangular object), you multiply its length, width, and height. To measure the volume of a regular solid object (a cube or rectangular object), you multiply its length, width, and height.

13 Volume of an Irregular Object The volume of an irregular object can be found by measuring displaced water in a graduated cylinder. The volume of an irregular object can be found by measuring displaced water in a graduated cylinder.

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15 Notes Volume – the amount of space that matter takes up. Volume – the amount of space that matter takes up. Of a liquid – measure in a beaker or g.c. Of a liquid – measure in a beaker or g.c. Of a regular solid – L x W x H Of a regular solid – L x W x H Of an irregular object – displacement in a g.c. Of an irregular object – displacement in a g.c.

16 Density Density – the amount of matter in a given space. Density – the amount of matter in a given space. Which is more dense a golf ball or table tennis ball? Why? How do their volumes compare? Their masses?

17 Density Density = Mass Density = Mass Volume Volume

18 Density can help identify a substance

19 Physical Properties (Fill in Spider) Ways to physically describe matter: density density physical state (solid, liquid or gas at certain temperatures and pressures) physical state (solid, liquid or gas at certain temperatures and pressures) color color odor odor solubility in water (the ability of substance to dissolve in water) solubility in water (the ability of substance to dissolve in water)

20 melting point melting point boiling point boiling point hardness hardness malleability malleability conductivity conductivity Some more examples of physical properties are:

21 Chemical Property A chemical property describes an object/substances’ ability to change into something new. A chemical property describes an object/substances’ ability to change into something new. FLAMMABILITY FLAMMABILITY REACTIVITY REACTIVITY

22 Some examples of chemical properties are: paper burns paper burns iron rusts iron rusts gold does not rust gold does not rust wood rots wood rots nitrogen does not burn nitrogen does not burn silver does not react with water silver does not react with water sodium reacts with water sodium reacts with water

23 In each of these, the substance's chemical property is its tendency to: react react tarnish tarnish corrode corrode explode explode

24 Physical vs. Chemical Properties Wood Physical Property: Grainy texture Chemical Property: Flammable

25 Baking Soda Physical Property: Physical Property: White powder Chemical Property: Chemical Property: Reacts with vinegar to produce bubbles

26 Physical vs. Chemical Properties Iron Physical Property: Physical Property: Malleable (able to be shaped) Chemical Property: Chemical Property: Reacts with oxygen to form rust

27 DRAW IN NOTEBOOK Physical Chemical Wood Bike Gasoline Penny Mentos

28 Physical and Chemical Changes Same or Different

29 Physical Change Changes Changes only the physical property property of the substance An An example of a physical change occurs when making a baseball bat. Wood is carefully crafted into a shape which will allow a batter to best apply force on the ball. Even though the wood has changed shape and therefore physical properties, the chemical nature of the wood has not been altered. The bat and the original piece of wood are still the same chemical substance.

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31 The material itself is the same before and after the change. The change CAN be “undone.” Ice melting: an example of physical change Ice melting: an example of physical change Ice melting: an example of physical change

32 Chemical Change Occurs when one or more substances are changed into entirely NEW substances Occurs when one or more substances are changed into entirely NEW substances They have different properties from the original substance They have different properties from the original substance Some signs (or evidence) of chemical change are: Some signs (or evidence) of chemical change are: a gas is produced, a gas is produced, the temperature changes, the temperature changes, a substance disappears, a substance disappears, a solid is formed a solid is formed a color change occurs, a color change occurs, a new odor is produced. a new odor is produced.

33 Examples of Physical and Chemical Changes Physical ChangesChemical Changes Aluminum foil is cut in half.Milk goes sour. Clay is molded into a new shape.Jewelry tarnishes. Butter melts on warm toast.Toast is burnt Water evaporates from the surface of the ocean.Rust forms on a nail left outside. A juice box in the freezer freezes.Gasoline is ignited. Rubbing alcohol evaporates on your hand.Hydrogen peroxide bubbles in a cut. A stick is broke in two. Food scraps are turned into compost in a compost pile. A window is shattered.A match is lit. A car is wrecked You take an antacid to settle your stomach. Hair is cutYour body digests food.

34 More examples frame.htm frame.htm

35 Summing it Up Physical Change: Physical Change: The matter is the same. The matter is the same. The original matter can be recovered. The original matter can be recovered. The particles of the substance are rearranged. The particles of the substance are rearranged. Chemical Change: Chemical Change: The matter is different. The matter is different. The old matter is no longer present. The old matter is no longer present. The original matter cannot be recovered. The original matter cannot be recovered.

36 Physical or Chemical Change? How do you know? (Fill in the sheet on page 66 for these examples)

37 Physical or Chemical Change? Burnt Toast

38 Physical or Chemical Change? Chemical the process cannot be undone the toast it burnt

39 Physical or Chemical Change? ewkey=c cf3c09dc71d6 Vinegar and Baking Soda

40 Physical or Chemical Change? ewkey=c cf3c09dc71d6 Chemical the process cannot be undone A gas is produced

41 Physical or Chemical Change? Ice Melting

42 Physical or Chemical Change? Physical the process can be undone hasn’t changed the chemicals still H 2 O

43 Physical or Chemical Change? Glowsticks

44 Physical or Chemical Change? Chemical the process cannot be undone energy is given off in the form of light

45 Physical or Chemical Change? Bleach on Construction Paper

46 Physical or Chemical Change? Chemical the process cannot be undone a substance disappears (color) color change occurs

47 Physical or Chemical Change? Apples turn brown

48 Physical or Chemical Change? Chemical the process cannot be undone color change occurs

49 Physical or Chemical Change? Alka-Seltzer and Water

50 Physical or Chemical Change? Chemical the process cannot be undone a gas is produced a substance disappears

51 Physical or Chemical Change? Tarnished Penny

52 Physical or Chemical Change? Chemical the process cannot be undone a color change occurs

53 Physical or Chemical Change? Broken Pencil

54 Physical or Chemical Change? Physical the process can be undone hasn’t changed the chemicals

55 Physical or Chemical Change? Burned Paper

56 Physical or Chemical Change? Chemical the process cannot be undone a substance has disappeared a gas is produced a color change occurs

57 Physical or Chemical Change? Burning Candle

58 Physical or Chemical Change? Chemical the process cannot be undone a substance has disappeared heat is produced a color change occurs

59 Physical or Chemical Change? Torn Paper

60 Physical or Chemical Change? Physical the process can be undone hasn’t changed the chemicals


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