Niamh Cullen's Yr8 Science Summer
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Where the reactions happen
Controls chemical reactions in a cell, contains DNA.
Controls entry and exit of substances.
Solid- 1 of the 3 states of matter?
- Very close together.
- Regular arrangement
- Particles held tightly
- Can't move from place-to-place.
Liquid- 1 of the 3 states of matter?
- Particles held weakly
- Very close together
- Random arrangment
- Constantly move past eachother
Gas- 1 of the 3 states of matter?
- No attraction between particles
- Far apart
- Random arrangement
- Move quickly in all directions
A group of CELLS make up a...
A group of TISSUES makes up an...
A group of ORGANS makes up a...
A group of SYSTEMS makes up an...
Contains a liquid called cell sap
Made of cellulose and gives the cell strength
Contain chlorophyll. Which gives the plant it's GREEN colour. Photosyntlesis takes place here. Chloroplasts traps light energy from the sun
First 20 elements?
Consist of only one type of atom.
Consist of more than one type of atom which are not easily seperated
Consist of more than one type of atom which are easily seperated
The father of Periodic Table?
- Dmitri Mendeleev
- Born: 1834
- Died: Jan 20th 1907
Characteristics of living things? (MRS GREN)
Job of blood vessel?
To carry blood around the body.
Job of heart?
Keep the blood moving and pump it around the body
Job of arteries?
Carry blood AWAY from heart
Job of veins?
Carries blood BACK again
Job of capillaries?
Tiny blood vessels that CONNECT the two.
What is more dangerous? Cutting 1 ARTERY or a COUPLE CAPILLARIES?
1 ARTERY; because the artery carries FAR more blood.
What do the walls allow substances to do?
The walls allow substances to pass backward & forwards between the blood and the cells
How many stages in the life cycle of a butterfly?
- 1) Egg.
- 2) Larvae
- 3) Chrysalis
- 4) Adult.
First thing the larvae eat?
The egg case.
Differences between ASEXUAL and SEXUAL?
Asexual- Requires one gamestes. Can reproduce inviduals veery quickly. There will be very little variation in the offspring.
Sexual- Requires 2 individual organisms. Lots of variation because they have a different cell from each parent. Slow to reproduce sexually.
What is a 'zygote'?
What seperates to become an embryo?
When blood flows TOWARDS the heart it travels in...
When blood travels AWAY from the heart it travels in...
- (Top) RIGHT ATRUIM.
- (Going down right) RIGHT VENTRICLE
- PULMONARY ATERY
- PULMONARY VEIN
- (Bottom) LEFT ATRUIM
- (Going up left) LEFT VENTRICLE
- BODY CELLS
- VENA CAVA
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