Term
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Definition
1. water is made up of atoms bonded to form molecules.
2. water contains half as many oxygen atoms as hydrogen H2O.
3. Water molecues tend to stick together.
4. Water molecules are polar molecules (they are not magnetic!). |
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Term
| What is water's chemical formula |
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Definition
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Term
| Why is a water molecule a polar molecule? |
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Definition
| It is a molecule that has electrical charges. The positive hydrogen ends of one water molecule attract the negative oxygen ends of nearby water molecule. |
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Term
| The positive hydrogen ends of one water molecule attract the _____ ______ ends of nearby water molecules. |
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Definition
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Term
| Name for facts about water's surface tension |
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Definition
1. It helps insects "skate" across the surface of the water.
2. It refers to the tightness across the surface of water.
3. It is caused by polar molecules attracting each other.
4. It causes raindrops to form round beads. |
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Term
| What is water's surface tension mean? |
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Definition
| It refers to the tighness across the surface of the water. |
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Term
| How does surface tension force the surface of water to curve? |
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Definition
| The molecules at the surface are being pulled by other molecules. The pulling forces the water to curve. |
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Term
| 4 facts about capillary action |
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Definition
1. it explains how water moves against the forces of gravity.
2. It is due to the attraction among molecules of water and surrounding materials.
3. It allows water to move through materials with pores.
4. ???It does not cause clothing to stay dry. |
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Term
| A mixture that forms when one substance dissolves another is called a(an) __________. The substance that does the dissolving is called a(an) _______. |
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Definition
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Term
| Why can water dissolve many substances? |
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Definition
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Term
| List the 3 states of matter |
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Definition
| 1. solid 2. liquid 3. gas |
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Term
| Solid water is called _________. |
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Definition
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Term
How water changes state:
Type of change MELTING |
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Definition
Starts as solid
ends as liquid |
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Term
How water changes state:
Type of change BOILING |
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Definition
starts as liquid
ends as gas |
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Term
How water changes state:
Type of change EVAPORATION |
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Definition
starts as liquid
ends as gas |
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Term
How water changes state:
Type of change CONDENSATION |
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Definition
starts as gas
ends as liquid |
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Term
How water changes state:
Type of change FREEZING |
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Definition
starts as liquid
ends as solid |
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Term
| Name an example of evaporation |
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Definition
| air drying your hair after swimming |
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Term
| True of False: Ice is less dense than liquid. |
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Definition
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Term
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Definition
| The amount of heat needed to increase the temperature of a certain mass of a substance by one degree Celcius. |
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