BIOLOGY
The bodies of all plants and .... are made up of tiny living units called ....
1. animals, 2.cell
What is diffusion?
The spreading out of particles.
Metals are good ... of electricity
conductors
What is photosynthesis?
Photosynthesis is the process in which green plants use sunlight to make their own food.
What does palisade cell do?
Absorb sunlight in order to make food.
In a solution of water and sugar, what is the water and sugar called?
Sugar: solute; Water: solvent
What object gives out its own light?
A luminous
What is the reflection of light?
The reflection occurs when a light ray hits a surface and bounces off.
Carbonhydrate, protein, fat, vitamins, minerals, fibre
What are the electric structure (arrangement of electrons) for:
- Lithium atom:
- Sodium atom:
- Potassium atom
- 2,1
- 2, 8, 1
- 2, 8, 8, 1
Vaccum - No air so that nothing will carry the vibrations
During changes in puberty,
- Boys have a hormone called ... which is produced by ...
- Girls have a hormone called ... which is produced by ...
- Testosterone, the testes
- Oestrogen, the ovaries
In the man, the testes make the sperm cells. The sperms are stored in a coiled tube called the ....
epididymis
Correct methods for seperating:
- muddy water
- copper sulfate solution
- pea and sand
- iron filings and sawdust
1. filtration
2. distillation
3. sieving
4. magnetic attraction
The spreading out of colours is called...
The range of colours in white light is called...
Spectrum
Dispersion
2 Adaptations that the Arabian oryx has to live in hot deserts?
- White coat reflects much of the radiation from the Sun.
- Wide feet that help them stay on top of the sand.
- Feed mostly at night, so they don't lose so much water from their bodies by evaporation.
- Have hooves with a large area which helps to stop them from sinking into soft sand.
1. When the baby reaches 9 weeks old it's called a ...
2. The umbilical cord attaches the baby to the ...
1. foetus; 2. placenta
1. Layers of rocks are called... (1)
2. Ignious rocks form when... (3)
3. Metarmorphicrocks have been changed by ... (3)
1. Strata
2. Magma cools down
3. Heat or pressure
- What is the principle of moment?
- How to measure the volume of an irregular shape?
- Clockwise = Anticlockwise
- Put that object into a cyclider that contains water. Measure the volume of water and the volume of it after putting the object into the cyclinder. The increase in volume is the volume of that object.
Word equations for:
- Carbonate and acid
- Acid and alkali
- Metal and acid
- Metal in water
- Carbonate + acid -> Salt + water + carbon dioxide
- Acid + alkali -> Salt + water
- Metal + acid -> Salt + hydrogen
- Metal + water -> Metal hydroxide + hydrogen