Definitions P (part one)

DefinitionsP (part one)

Click for each heading

then for the answer

Physics is

phun

Potential Energy

• Energy due to position or condition

• Water behind a dam or at top of waterfall

• Wound up spring e.g. wind up clock

pH• pH more than 7

base (blue)

• pH = 7

neutral (green)

• pH less than 7

acid (red)

Pollination

• Transfer of pollen• From anther (of stamen)

• To stigma (of carpel)

• 2 methods WIND

• or INSECT

2 methods

Photosynthesis

• Plants make food (and oxygen)

• from carbon dioxide and water

• using sunlight energy and chlorophyll

• Test leaf for starch to see if photosynthesis has happened

Water Glucose + OxygenCarbon+Dioxide

Sunlight

Chlorophyll

Energy

Traps Light

Energy

Chemical Energy =

food

From air through stomata

From soil Through roots and

xylem

For respirationOUT to air

Through stomata

Photosynthesis Equation

Photosynthesis Experiment

Leaf in hot water 10 mins

To soften leaf

Leaf in hot alcohol (A)10 -15 mins

To remove chlorophyll

Leaf in hot water 5s

To rinse leaf

Add iodine

Goes blue-black

Starch is present

Power

• Power = work done time taken

Measured in WATTS (W)

Also electrical power – more watts / more elec. Used per second

6W

60W

Pooter

• Instrument for collecting small animals and insects in ecology

Proton

• Particle inside an atom

• In the nucleus

• POSITIVE in charge

• How many??

• Atomic number (small number)

Pregnancy

• Time when embryo or foetus is

• Developing in the womb (uterus)

• 9 months for human

Phloem

• Tubes for carrying Food in plants

• (Flow-em …..Food)

Premolars

• Type of tooth for crushing and grinding

• Pressure = Force

Area

• Units = (Pa) pascals (N/m2)

• Large area – small pressure • Small area – large pressure

• High pressure = good weather• Barometer = measures atmospheric pressure • Pressure increases with depth ( shape of dams)

Pressure

Platelets

• Clot the blood

• Clotting stops bleeding

• Prevents entry of bacteria

• Do I know it??

• Potential energy

• pH

• Pollination

• Photosynthesis•

Photosynthesis Equation•

Photosynthesis Experiment

• Power

• Pooter

•Proton•Pregnancy•Phloem•Premolars•Pressure•Platelets