Chemistry
Physics
Biology
Mixed Bag
Easy Peasy
100

Explain types of Bunsen burner flames and how they are created.

Air hole fully open ==> Roaring blue flame (Noisy blue)

Air hole half open ==> Medium blue flame

Air hole fully closed ==> Safety flame (Quiet yellow flame)

100

Explain the effects a force can have on an object.

A force can change the shape or size of an object,

change the speed of a moving object (speed up/slow down), or 

change the direction of a moving object.

100

Name the 7 life processes

Mrs Gren thingie

100

Name four contact forces.

any 4 valid: example friction, air resistance, water resistance, upthrust

100

Type of wave where Particles vibrate parallel to the direction of the wave? 

Longitudinal

200

Explain three types of mixtures and give examples.

Suspension: Solids settle over time. Example: Muddy water.

Colloid: Tiny particles don’t settle. Example: Milk.

Solution: Solute fully dissolves. Example: Salt in water.

200

Explain the relationship between force, area, and pressure and give an example.  

Pressure = force ÷ area.

Greater force   increases pressure;

smaller area increases pressure;

200

Name 7 types of organ systems in humans. (That we learned in class)

Give any example of 1 organ for each organ system.

Breathing system: Trachea, lungs 

Circulatory system: Heart, blood vessels – 

Digestive system: Mouth, oesophagus, stomach, intestines 

Nervous system: Brain, spinal cord, nerves – 

Urinary system: Kidneys, bladder – 

Locomotor system: Muscles, bones – 

200

Name two specialized cells in plants and their function.

root hair cell – absorbs water; 

xylem – transports water

200

Plant organ for photosynthesis

Leaf

300

Explain the difference between boiling and evaporation

Evaporation:

- any temperature

- happens at the surface

- slow

- No bubbles

Boiling (..Valid points opposite to evaporation)

300

Explain how a motorbike maintains steady speed using balanced forces

The forward force from the engine equals the opposing forces of friction and air resistance, keeping the speed constant

300

Describe the function of:

1. Nucleus

2. Mitochondria

3. Chloroplast

Nucleus ==> Controls the cell

Mitochondria ==> Produces energy

Chloroplast ==> Capture sunlight to make food 

300

Explain why a sharp knife cuts better than a blunt knife.

- Small area

- Larger pressure

300

Breaking down compound with heat

Decomposition

400

Explain the difference between an atom, a molecule, an element, and a compound. Give two examples of each and describe how they are formed.

Atom: Smallest particle of an element. Example: Hydrogen (H), Oxygen (O). Formed naturally. (+ 2 Valid Examples)

Molecule: Two or more atoms bonded together. Example: O₂, H₂O. Formed by chemical bonding. (+ 2 Valid Examples)

Element: Substance made of only one type of atom.(+ 2 Valid Examples)

Compound: Substance made of two or more elements chemically bonded. (+ 2 Valid Examples)

400

Compare transverse and longitudinal waves

Transverse: particle motion perpendicular to wave, e.g., water waves;

Longitudinal: particle motion parallel to wave, e.g., sound waves; 

Both transfer energy without matter.

400

Describe what the Diaphragm is and how it works.

- Muscular sheet under lungs

- helps with breathing

- Move downwards ==> lungs bigger ==> Fills with air

- Move upwards ==> Lungs smaller ==> Air goes out

400

Describe how to test for carbon dioxide.

Bubble gas through limewater; it turns milky if CO₂ is present.

400

Colloid type for blood

Sol

500

Describe 4 methods of separating mixtures. Give 1 example for each.

Filtration: Separates insoluble solids from liquids. Example: Sand + water using filter paper.

Evaporation: Separates soluble solids from solution. Example: Salt from saltwater.

Distillation: Separates liquids and dissolved solute from a mixture. Example: Pure water from salt solution

Chromatography: Separates different solutes in a mixture. Example: Ink colours using chromatography paper.

500

Explain, step by step, how sound waves travel through the ear and are detected by the brain.

- Enters ear canal

- Eardrum vibrates

- Tiny bones vibrates ==> Amplify vibrations

- Hair in Cochlea vibrates ==> Creates impulses (electrical signals)

- Impulses travel along Auditory Nerve

- Sent to brain

500

Describe the function of:

1. Kidneys

2. Small Intestine

3. Large Intestine

4. Stomach

5. Heart

6. Lungs

Kidneys: Cleans blood; Produces urine

Small Intestine: Absorbs nutrients into blood

Large Intestine: Removes water

Stomach: Breaks down food using stomach acid

Heart: pumps blood around your body

Lungs: Gives oxygen to blood for respiration and takes out carbon dioxide

500

Explain what happens when a spring is stretched. Your explanation should include what happens initially, and then eventually at the end.

- Initially, extension ∝ force (Hooke’s law)

- Beyond elastic limit → spring does not return to original length

500

Tissue transporting water in plant

Xylem