DefinitionsP (part 2)

Click for each heading

then for the answer

Physics =

phun

Phototropism

Growth response of a plant to light

• Plant gets more light

• More photosynthesis happens

• More food for plant

• Grows bigger faster

Physical Change• No new substance is made

• Usually easy to reverse

• Little or no energy needed

• Ice melting or gas condensing = examples

Physical Digestion

• Food is cut into smaller particles

• by chewing or grinding

• in mouth and stomach.

Periodic Table of Elements

• All elements arranged in order of atomic number – smallest to largest

• Designed by Mendeleev

Periods

Groups

Names of Groups• Group One

• Alkali Metals

• Group Two

• Alkaline Earth Metals

• Group Eight (zero)

Noble Gases

• Group Seven

Halogens

Pitfall trap

• Used to trap small insects, spiders, slugs etc

• Jam jar in ground covered by stone.

Placenta (the afterbirth)

• Allows two-way transfer of substances between mother and child blood

• Blood of child and mother don’t mix together

• Leaves the uterus 15- 20 minutes after the baby is born – “after” “birth”

Plasma

• Liquid part of blood

• 90% water

• 10% dissolved substances

Plastics

• Man made materials made from crude oil

• Do not bio-degrade(rot)

• Pollution problem – so reduce, reuse, recycle

Pollution

• Adding unwanted waste material to the environment

Producer

• Plant that makes own food in Photosynthesis

• Starts off every food chain

Product

• The substance made in a chemical reaction ( e..g. hydrogen when acid and metal react)

• Or made when an enzyme acts on (changes) a substrate• E.g. maltose is product of amylase working on starch

Protein• Food type used for growth and repair• Meat, fish, eggs are high in protein• Test – add biuret solution (Blue) to sample • RESULT

changes from blue to lilac• Conclusion

Protein is present

Puberty

• Time when child gradually becomes sexually mature due to sex hormones

• Approx 10 – 15 years of age

• Do I know it??• Phototropism• Physical change• Physical

digestion• Periodic Table of Elements

• Pitfall Trap• Placenta

•Plasma•Plastic•Pollution•Producer•Product•Protein•Puberty